Swift by Sundell

Antoine van der Lee, creator of SwiftLee, joins John to discuss the new language features that are being introduced as part of Swift 5.5 — from the brand new concurrency system, to convenience features and various improvements.

Sponsors

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• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Links

• Antoine on Twitter
• John on Twitter
• WeTransfer
• SwiftLee
• RocketSim
• The 2019 holiday special with Antoine and Donny Wals
• Xcode source editor extensions
• Automatic conversions between Double and CGFloat values
• Effectful read-only properties
• Computed properties vs methods
• Sendable
• Using the if compiler directive within expressions
• Unwrapping optionals within SwiftUI views
• Codable synthesis for enums with associated values
• Attaching property wrappers to function arguments
• Antoine’s article about using property wrappers for dependency injection
• Using static protocol APIs to create conforming instances
• The original Swift concurrency manifesto
• Previous episode about Swift’s concurrency features, with Doug Gregor from Apple
• Async/await
• NSLock
• Actors
• Structured concurrency
• Async let
• Connecting async/await to other Swift code
• The Operation type
• Using Combine subjects
• Async sequences
• Async streams
• RxSwift
• Intro and outro music by Dariusz Dziuk

Jordan Morgan returns to the show to discuss some of the key new APIs and frameworks that were announced at WWDC21, and how they can be integrated into the apps that we build, now that about two months have passed since the conference took place.

Sponsors

• Bitrise: Rock-solid continuous integration for your Swift project, which now offers 50% faster builds and ad-ons for things like automatic deployment. Go to bitrise.io/swift to get started for free.
• Instabug: Incredibly useful bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to start your free trial.

Links

• Jordan on Twitter
• John on Twitter
• The “A Best-in-Class iOS App” book series
• The “A Best-in-Class iOS App” article
• Spend Stack
• The previous episode with Jordan
• Swift by Sundell Discover
• DocC
• ShazamKit
• Taking UIKit’s new button configuration API for a spin
• Building modern collection views in Swift
• UISheetPresentationController
• Accessibility audio graphs
• SwiftUI’s accessibilityRepresentation API
• The new AttributedString type
• New SwiftUI list customization APIs
• Jordan’s “Spend Stack: Year One” article with an email reply from Craig Federighi
• SharePlay
• Previous episode all about Swift’s concurrency features
• Combine
• NotificationCenter
• AsyncStream
• Intro and outro music by Dariusz Dziuk

Malin Sundberg joins John to talk about her experiences of using SwiftUI to build and ship the time-tracking and invoicing app Orbit on most of Apple’s platforms, and what sort of things that can be good to keep in mind when using SwiftUI in a cross-platform context.

Sponsors

• Tower: Take advantage of Git’s powerful feature set with Tower, a beautifully designed Git client that makes it easy to perform everything from commits to rebases. Get a 50% discount using the offer code SUNDELL at git-tower.com.
• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Links

• Malin on Twitter
• John on Twitter
• Orbit
• Malin’s NSSpain talk about SwiftUI
• SwiftUI and UIKit interoperability
• Orbit’s Trello board
• Using Xcode Previews
• Swift compiler directives
• The navigationSubtitle modifier
• SwiftUI’s new List APIs
• Intro and outro music by Dariusz Dziuk

Chris Lattner returns to the show to discuss Swift’s new concurrency features, the ongoing evolution of the language, and the importance of both language and API design. This, and much more, on this special 100th episode of the show.

Sponsor

Bitrise: Rock-solid continuous integration for your Swift project, which now offers 50% faster builds and ad-ons for things like automatic deployment. Go to bitrise.io/swift to get started for free.

Links

• Chris on Twitter
• John on Twitter
• LLVM
• SiFive
• The previous episode with Chris
• RISC-V
• Matrix multiplication
• The bfloat16 floating-point format
• Value semantics
• Publish
• The original Swift concurrency manifesto
• Grand Central Dispatch
• Automatic Reference Counting (ARC)
• Async/await
• Actors
• Structured concurrency
• The MainActor attribute
• The Sendable protocol
• Haskell
• Erlang
• Swift’s built-in error handling system
• Variadic generics
• Optionals
• Intro and outro music by Dariusz Dziuk

Doug Gregor from Apple joins John to discuss Swift 5.5’s new concurrency features in great detail. How do features like async/await and actors work under the hood, and how were those concepts adapted in order to feel right at home within Swift’s existing ecosystem? That, and much more, on this WWDC21 special episode of the show.

Sponsors

• DetailsPro: A native, fast, and beautiful design tool for iPhone, iPad and Mac, which lets you design, prototype and even build entire SwiftUI-powered UIs super easily. Try it for free at detailspro.app.
• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Links

• Doug on Twitter
• John on Twitter
• Swift Evolution
• Async/await
• Futures and Promises
• Combine
• Task
• URLSession’s async/await-powered APIs
• Continuations
• Using SwiftUI’s refreshable modifier
• SwiftUI’s task modifier
• Calling async APIs from a synchronous context
• AsyncSequence
• Doug and Dario Rexin’s WWDC21 talk about actors
• Erlang
• Akka’s implementation of actors
• The Sendable protocol
• The MainActor type
• Intro and outro music by Dariusz Dziuk

Sean Allen returns to the show to talk about using the MVVM design pattern within SwiftUI-based apps, building a course around MapKit and CloudKit, how to approach all of the new material that WWDC has to offer, and what goes into making a really great developer portfolio.

Sponsors

• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive discount on their two-year plan, and an extra free month, at nordvpn.com/sundell.
• MacStadium: The leading provider of cloud solutions built on real Mac hardware. Get started at macstadium.com/sundell.

Links

• Sean on Twitter
• John on Twitter
• Sean’s new course: Dub Dub Grub
• Sean’s YouTube channel
• CloudKit
• Dribbble
• Behance
• Sean’s MVVM video
• Different flavors of view models in Swift
• The SwiftUI environment API
• Stack Overflow answer about SwiftUI and view models
• The factory pattern
• The recent episode with David Smith
• WWDC by Sundell & Friends
• Sean’s most recent portfolio review video
• Intro and outro music by Dariusz Dziuk

Ish ShaBazz returns to the show for a special pre-WWDC episode about what new APIs and developer tools that Apple might announce at this year’s edition of the conference. What’s in store for Swift and SwiftPM, how might UIKit and SwiftUI continue to evolve, and will this be the year when we’ll finally see Apple’s new AR/VR platform?

Sponsors

• Instabug: Incredibly useful bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to start your free trial.
• MacStadium: The leading provider of cloud solutions built on real Mac hardware. Get started at macstadium.com/sundell.

Links

• Ish on Twitter
• John on Twitter
• Capsicum
• Stacktrace
• The official changelog for Swift 5.5
• Actors
• Async/await
• Chained implicit member expressions
• Grand Central Dispatch
• OperationQueue
• Combine
• TextEditor
• Using the SwiftUI app lifecycle
• WidgetKit
• SwiftUI’s state management system
• Widgetsmith
• NSHostingView
• ARKit
• Intro and outro music by Dariusz Dziuk

Adam Bell returns to the show to talk about animations, both how to make great use of the built-in animation tools that the iOS SDK ships with, but also how to drive custom, gesture-driven animation logic and the sort of performance optimizations that are typically required when writing that sort of code.

Sponsors

• MacStadium: The leading provider of cloud solutions built on real Mac hardware. Get started at macstadium.com/sundell.
• Instabug: Incredibly useful bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to start your free trial.

Links

• Adam on Twitter
• John on Twitter
• Motion
• The previous episode with Adam
• Decomposed
• CATransform3D
• SIMD
• Core Animation
• UIViewPropertyAnimator
• CADisplayLink
• Time complexity
• Imagine Engine
• Swift’s @_specialize attribute
• Static vs dynamic dispatch in Swift
• Swift’s @inlinable attribute
• CATransaction
• UISpringTimingParameters
• CAKeyFrameAnimation
• SwiftUI’s animation API
• Detecting whether the “reduce motion” accessibility setting is enabled
• Intro and outro music by Dariusz Dziuk

Brent Simmons returns to the show to discuss multi-threading and concurrency, and how to make good use of tools like Grand Central Dispatch. Also, building NetNewsWire in the open, the current state of SwiftUI, and the type of responsibilities that senior developers typically have.

Sponsors

• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive discount on their two-year plan, and an extra free month, at nordvpn.com/sundell.
• Bitrise: Rock-solid continuous integration for your Swift project, which now also supports ad-ons for things like automatic deployment. Go to bitrise.io/swift to get started for free.

Links

• Brent on Twitter
• John on Twitter
• NetNewsWire
• Brent’s blog: inessential.com
• The previous episode with Brent
• NetNewsWire on GitHub
• How NetNewsWire Handles Threading
• Basics: Grand Central Dispatch
• Using the more advanced features of Grand Central Dispatch
• OperationQueue
• Pure functions
• Intro and outro music by Dariusz Dziuk

Benedikt Terhechte returns to the show to discuss the pros and cons of using technologies like Catalyst and SwiftUI to build Mac apps, and also to share tips and tricks on how to use AppKit for use cases that Apple’s more modern frameworks do not yet support.

Sponsors

• Stream: Build scalable in-app chat or activity feeds in record time using Stream’s open source, Swift-native SDK that’s backed by enterprise-grade server infrastructure. Get started for free at getstream.io/sundell.
• Clubhouse: A lightweight, yet powerful project management tool that’s built specifically for software teams. Try it for free for two months at clubhouse.io/sundell.

Links

• Benedikt on Twitter
• John on Twitter
• Hyperdeck on Twitter
• The previous episode with Benedikt
• Hyperdeck
• The Contravariance podcast
• Mac Catalyst
• NSDocument
• An example of embedding a GeometryReader as a background
• The isFlipped property
• The NSView animator API
• NSProxy
• NSCollectionView
• Triggering terminal commands from Swift
• Intro and outro music by Dariusz Dziuk

Donny Wals, book author and iOS developer at Disney Streaming Services, joins John to give practical tips on Combine and Core Data. How to manage and test increasingly complex Combine pipelines, and how come the opinions on Core Data are so divisive? Also, working on internal SDKs and frameworks, and taking a pragmatic approach to unit testing.

Sponsors

• Emerge: A new tool that can help you visualize and reduce your app’s binary size. Visit emergetools.com to learn more, and to request a demo.
• Bitrise: Rock-solid continuous integration for your Swift project, which now also supports ad-ons for things like automatic deployment. Go to bitrise.io/swift to get started for free.

Links

• Donny on Twitter
• John on Twitter
• Practical Combine
• Practical Core Data
• The 2019 holiday special
• UML
• Quick
• Unit testing
• Donny’s try! Swift talk about Core Data
• Connecting and merging Combine publishers
• The Publisher protocol
• OperationQueue
• Grand Central Dispatch
• PromiseKit
• Combine’s Future type
• Building your own Futures and Promises system
• Building custom Combine publishers
• PassthroughSubject
• Unit testing asynchronous code
• Unit testing Combine-based code
• NSPersistentContainer
• Core Data’s perform API
• Realm
• Intro and outro music by Dariusz Dziuk

Kaitlin Mahar, lead engineer at MongoDB and member of the Swift Server Work Group, joins John to discuss the current state of server-side Swift, designing APIs for server-side libraries, and Swift’s upcoming suite of structured concurrency features.

Sponsor

Clubhouse: A lightweight, yet powerful project management tool that’s built specifically for software teams. Try it for free for two months at clubhouse.io/sundell.

Links

• Kaitlin on Twitter
• John on Twitter
• MongoDB’s Swift driver
• MongoDB Atlas
• The MongoDB + Vapor integration library
• MongoDB’s specifications repo
• Swift Server Work Group
• Cassandra
• The Server category on the Swift forums
• SwiftNIO
• Swift Package Index
• The Swift Server Work Group’s incubation process
• Async/await
• Futures and Promises
• Structured concurrency in Swift
• Combine
• The Builder pattern
• The Factory pattern
• Rust
• Codable
• BSON
• Publish’s Markdown metadata decoder
• Amazon’s Smoke framework
• Property wrappers
• Result/function builders
• Intro and outro music by Dariusz Dziuk

David Smith, creator of apps like Widgetsmith, returns to the show to discuss whether SwiftUI is currently capable and stable enough to build production-level apps, and what sort of things that can be good to keep in mind when starting to deploy SwiftUI in production.

Sponsors

• Instabug: Incredibly useful bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to start your free trial.
• Clubhouse: A lightweight, yet powerful project management tool that’s built specifically for software teams. Try it for free for two months at clubhouse.io/sundell.

Links

• David on Twitter
• John on Twitter
• Widgetsmith
• Watchsmith
• Under the Radar
• The previous episode with David
• The new SwiftUI-based app lifecycle
• Sleep++
• Using the SwiftUI preferences system to build layouts
• Syncing the width or height of two SwiftUI views
• GeometryReader
• SwiftUI and UIKit interoperability
• SwiftUI’s environment API
• ObservableObject
• Avoiding singletons in Swift
• Intro and outro music by Dariusz Dziuk

Matt Gallagher, creator of Cocoa with Love, returns to the show to discuss how the introduction of SwiftUI and Combine has impacted how apps are architected on Apple’s platforms, and what sort of principles that are good to keep in mind when designing a solid app architecture.

Sponsors

• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• Instabug: Incredibly useful bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to start your free trial.

Links

• Matt on Twitter
• John on Twitter
• Cocoa with Love
• Matt’s previous appearance on the show
• Combine
• RxSwift
• Published properties
• Function/result builders
• SE-0298: Async/Await: Sequences
• Futures and Promises
• Connecting and merging Combine publishers
• The objc.io App Architecture book
• Matt’s articles about SwiftUI app architecture
• Unit testing
• View models
• SwiftUI’s state management system
• PassthroughSubject
• Intro and outro music by Dariusz Dziuk

Ellen Shapiro returns to the show to discuss framework and SDK development, and how that often requires a somewhat different process from app development. Also, API design, GraphQL, using the standard library’s protocol-oriented design, and more.

Sponsors

• Clubhouse: A lightweight, yet powerful project management tool that’s built specifically for software teams. Try it for free for two months at clubhouse.io/sundell.
• Genius Scan: Add advanced document scanning features to your app using Genius Scan’s powerful SDK. Learn more at geniusscansdk.com, and mention Swift by Sundell when requesting a demo or quote for a 20% discount for a whole year.

Links

• Ellen on Twitter
• John on Twitter
• Apollo
• GraphQL
• The documentation for Apollo’s iOS SDK
• The roadmap for Apollo’s iOS SDK
• Cloudflare’s GraphQL analytics API
• Publish’s PublishingStep API
• Using Apollo’s interceptor API
• OkHttp
• Codable
• Identifiable
• Swift’s Collection protocol
• Intro and outro music by Dariusz Dziuk

On this special episode of the show, John wraps up the 2020 season by revisiting some of the key themes and topics that were discussed on the show during the year.

Sponsors

• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive 68% discount on their two-year plan, and extra free months, at nordvpn.com/sundell.

Links

• “Swift Playgrounds” with Holly Borla and Grace Kendall
• “Key paths, functions and closures” with Vincent Pradeilles
• “A huge year for SwiftUI” with Josh Shaffer and Eliza Block
• “What’s new in Swift 5.3” with JP Simard
• “All about UICollectionView” with Ben Scheirman
• “Many layers of SwiftUI” with Tobias Due Munk
• “Adventure into widgets” with Simon Støvring
• “Polymorphic interfaces” with Dave Abrahams
• “Tools are just apps” with Gui Rambo
• “MVPs and prototypes” with Leah Culver
• “Adopting new system features” with Jordan Morgan
• Intro and outro music by Dariusz Dziuk

Chris Eidhof returns to the show to go on a deep dive into the SwiftUI layout system. What are the different phases involved in determining a given view’s layout, how do concepts like layout priorities and flexibility work, and what makes SwiftUI different from UIKit and AppKit in terms of layout?

Sponsor

NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive 68% discount on their two-year plan, and extra free months, at nordvpn.com/sundell.

Does your company want to sponsor Swift by Sundell and reach tens of thousands of Swift developers like you? Check out this sponsorship page for more information.

Links

• Chris on Twitter
• John on Twitter
• objc.io
• Swift Talk
• The previous episode with Chris (and Matt Gallagher)
• Thinking in SwiftUI
• Elm
• Talk about Incremental
• The SwiftUI Lab
• Session 237 from WWDC 2019
• objc.io article about how HStack layouts are computed
• GeometryReader
• A guide to the SwiftUI layout system
• UICollectionViewFlowLayout
• Intro and outro music by Dariusz Dziuk

Daniel Steinberg joins John to discuss how various functional programming patterns can be adopted in Swift, and how many of those patterns can be found in both the standard library and in frameworks like Combine and SwiftUI.

Sponsors

• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• Instabug: Bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to learn more about Instabug’s new App Performance Monitoring feature, and to start your free trial.

Links

• Daniel on Twitter
• John on Twitter
• Daniel’s books on Swift, SwiftUI and functional programming
• Function builders
• @StateObject
• React
• The Core Animation programming guide
• Map, flatMap and compactMap
• One of Daniel’s talks about map and functional programming
• The Gang of Four book on design patterns
• Combine
• The Result type
• The implementation of the map function
• First class functions
• Passing key paths as functions
• The previous episode with James Thomson
• The delegate pattern
• Ink
• Publish
• Managing dependencies using the Swift Package Manager
• dimsumthinking.com
• Intro and outro music by Dariusz Dziuk

James Thomson, creator of PCalc, returns to the show to discuss how developers can bring their apps to multiple Apple platforms using technologies like Catalyst and SwiftUI, and how and when it can be a good idea to share code across platforms.

Sponsors

• Genius Scan: Add advanced document scanning features to your app using Genius Scan’s powerful SDK, which you can integrate with just a single line of code. Learn more at geniusscansdk.com, and feel free to mention that you heard about them on Swift by Sundell when requesting a demo or quote.
• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive 68% discount on their two-year plan at nordvpn.com/sundell.

Links

• James on Twitter
• John on Twitter
• PCalc
• Dice by PCalc
• Previous episode with James
• James’s blog post about Catalyst
• The new “Optimize Interface for Mac” Catalyst feature
• SwiftUI’s Picker control
• Importing a UIKit view into SwiftUI
• SceneKit
• SpriteKit
• Metal
• Core Animation
• Core Graphics
• Imagine Engine
• Intro and outro music by Dariusz Dziuk

Vincent Pradeilles joins John to discuss various ways to use Swift language features like key paths and closures, how they relate to patterns typically used within functional programming, and when and how to adopt such patterns.

Sponsors

• Instabug: Bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to learn more about Instabug’s new App Performance Monitoring feature, and to start your free trial.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Vincent on Twitter
• John on Twitter
• ios_memes
• Function builders
• Property wrappers
• Combining dynamic member lookup with key paths
• SwiftUI’s List type
• NSSpain (use offer code “Sundell” for 10% off, by the way)
• Key paths
• Passing key paths as functions
• Map, FlatMap and CompactMap
• Combine
• GraphQL
• CaseIterable
• Sourcery
• First class functions
• Function currying
• Haskell
• Dependency injection using functions
• Pure functions
• Vincent’s talk about function composition
• Vincent’s talk about implementing pseudo-keywords through functional programing
• Swift’s closure capturing mechanics
• Kickstarter’s iOS app
• The delegate pattern
• Vincent’s KeyPathKit library
• Vincent’s YouTube channel
• “Crazy idea: What if we used marketing to start a tech blog?“
• Intro and outro music by Dariusz Dziuk

Simon Støvring, the developer behind several powerful iOS productivity apps, including Scriptable, joins John on an episode all about the new home screen widgets introduced in iOS 14. Topics include how to create and update dynamic widgets, managing and sharing data between an app and its widgets, and much more.

Sponsors

• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on, and unlock your video streaming services. Get a massive 68% discount on their two-year plan at nordvpn.com/sundell.
• NSSpain: An online, continuous 36-hour Apple developer conference taking place on November 19th and 20th, 2020. Get a 10% discount on your ticket by using the offer code SUNDELL when buying your ticket at nsspain.com.

Links

• Simon on Twitter
• John on Twitter
• The previous episode with Simon
• Scriptable
• Data Jar
• Jayson
• Widgetsmith
• A Scriptable widget using the Spotify web API
• A custom calendar and app launcher built with Scriptable
• Displaying custom weather and calendar information using Scriptable
• JavaScriptCore
• The JSExport protocol
• WidgetKit
• Configurable widgets using intents
• The TimelineProvider protocol
• Sharing UserDefaults data within an app group
• WidgetCenter
• In-app intent handling
• SDWebImage
• SwiftUI’s state management system
• Intro and outro music by Dariusz Dziuk

Jordan Singer joins John to discuss various approaches of turning designs into fully implemented UIs, how to manage things like mock data during the development process, and when to turn a given view into a reusable component. Also, the story behind the Airport app and Jordan’s recent SwiftUI experiments.

Sponsors

• Instabug: Bug, crash, and performance monitoring for iOS apps. Go to instabug.com/sundell to learn more about Instabug’s new App Performance Monitoring feature, and to start your free trial.
• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Links

• Jordan on Twitter
• John on Twitter
• Jordan’s website: ibuildmyideas.com
• Cash App
• Airport
• lil software
• Sketch
• Figma
• Framer
• SwiftUI implementation of “About this Mac”
• SwiftUiPod Classic
• Rdio remake
• Apple’s Fruta example app
• Using SwiftUI’s App protocol
• An entire SwiftUI app within a tweet
• Swift’s warning directive
• Episode with Meng To
• SwiftUI’s ButtonStyle protocol
• InsetGroupedListStyle
• Intro and outro music by Dariusz Dziuk

Carola Nitz, iOS developer at Netflix, joins John to discuss how larger iOS development teams typically operate, and how smaller teams can prepare their code bases for future growth. Also, organizing remote conferences, balancing feature development with bug fixing, and much more.

Sponsors

• Paw: An advanced API tool for the Mac. Paw is a full-featured HTTP client that lets you test and describe the web APIs that you build or consume. Get started for free, or get a 20% discount on your license, at paw.cloud/sundell.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Caro on Twitter
• John on Twitter
• App Builders
• The Swift Alps
• The rule of threes
• Feature flags
• Caro’s website
• Intro and outro music by Dariusz Dziuk

Nick Lockwood returns to the show to go on a deep dive into data structures and algorithms, what some of the pros and cons of writing high-performance code in Swift are, and how all of that relates to parallelization and performance.

Sponsor

Reveal: Inspect, debug, and modify your app’s UI in real time. Reveal takes UI debugging to a whole new level, and lets you instantly make all sorts of tweaks while your app is running. Get started for free at revealapp.com/sundell.

Links

• Nick on Twitter
• John on Twitter
• SwiftFormat
• ShapeScript
• Deckset
• RetroRampage
• Handmade Hero
• Publish
• The Collection protocol
• Imagine Engine’s Timeline API
• Grand Central Dispatch
• Combining value and reference types
• Creating custom collections
• Time complexity
• Tail call
• RetroRampage multithreaded rendering
• Intro and outro music by Dariusz Dziuk

Ben Scheirman, creator of NSScreencast, joins John on an episode all about UICollectionView. How have UICollectionView’s features evolved over time, and how are modern APIs like compositional layouts and diffable data sources changing the way collection views are built and used?

Sponsors

• Instabug: Join thousands of companies, including Lyft and eBay, who use Instabug to enhance their app quality and iterate faster. Go to instabug.com/sundell to try it for free for 3 months.
• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Links

• Ben on Twitter
• John on Twitter
• Get a 20% discount on NSScreencast
• Ben’s new video series “Working with modern collection views”
• UICollectionViewFlowLayout
• The NSScreencast iOS app
• UICollectionViewDiffableDataSource
• UICollectionView’s batch update API
• NSDiffableDataSourceSnapshot
• UICollectionViewCompositionalLayout
• CSS FlexBox
• UIListContentConfiguration
• Using UICollectionView to build lists on iOS 14
• The new CellRegistration API
• Tonal Therapy
• Intro and outro music by Dariusz Dziuk

JP Simard returns to the show to discuss Swift 5.3’s main new features and improvements, and what those changes might tell us about the current state of Swift and its evolution process.

Sponsor

Noted: Bring audio and notes together with Noted. Create contextual notes for your online lectures, meetings and conferences across all Apple devices. Try it for free at everythingnoted.app/sundell.

Links

• JP on Twitter
• John on Twitter
• Swift Unwrapped
• Holiday special with JP and Jesse Squires
• Swift’s closure capturing mechanics
• SE-0269: Implicit self capturing
• SE-0279: Multiple Trailing Closures
• SwiftUI’s DSL
• SE-0280: Enum cases as protocol witnesses
• SE-0266: Synthesized Comparable conformance for enum types
• SE-0281: The @main attribute
• Using SwiftUI’s new App protocol
• Foundation’s Bundle API
• SE-0271: Package Manager Resources
• WWDC session about Swift package resources
• WWDC session about adding custom views to the Xcode Library
• SE-0273: Package Manager Conditional Target Dependencies
• Intro and outro music by Dariusz Dziuk

Jordan Morgan joins John to discuss various strategies for adopting new system features and APIs, how to keep up with the rapid changes to iOS, macOS and Apple’s other platforms, and how to allocate time between different projects.

Sponsor

Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift, and also check out their new podcast “Mobile DevOps is a Thing!”.

Sponsor the Swift by Sundell podcast and reach tens of thousands of developers, just like you! Learn more here.

Links

• Jordan on Twitter
• John on Twitter
• Buffer
• Spend Stack
• Swiftjective-C
• The Juggling Act
• A Best in Class iOS App
• Jordan’s Twitter thread about iOS design and UX
• Apple’s Human Interface Guidelines
• Accessibility videos from Apple
• Atomic Habits
• UIScene
• Avoiding singletons
• Combine
• Widgets
• Jordan’s conference talk from try! Swift
• Intro and outro music by Dariusz Dziuk

Josh Shaffer and Eliza Block from Apple join John to talk about what’s new in SwiftUI, how Xcode Previews work under the hood, the new home screen widget system, Apple’s internal process of adopting and improving SwiftUI, and much more.

Sponsors

• Instabug: Join thousands of companies, including Lyft and eBay, who use Instabug to enhance their app quality and iterate faster. It’s perfect for teams that are working remotely. Go to instabug.com/sundell to try it for free for 3 months.
• Clubhouse: A lightweight, yet powerful project management tool that’s fantastic for remote collaboration. Built specifically for software teams. Sign up for free at clubhouse.io/sundell.

Links

• Josh on Twitter
• Eliza on Twitter
• John on Twitter
• Last year’s episode with Josh
• SwiftUI’s documentation
• UIViewRepresentable
• App
• Scene
• The new ColorPicker
• StateObject
• watchOS complications
• DrawingGroup
• Widgets
• The new commands modifier
• NSDocument
• DocumentGroup
• Intro and outro music by Dariusz Dziuk

Dave Verwer and Sven A. Schmidt join John to talk about their newly launched Swift Package Index, and what the overall state of Swift’s package ecosystem currently is. Also, dependency management, composing libraries, deploying server-side Swift in production, and much more.

Sponsors

• NordVPN: Make your Internet connection private and secure, no matter which network that you’re on. Get 50% off their one-year plan at nordvpn.com/sundell, or when using offer code SUNDELL.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift, and also check out their new podcast “Mobile DevOps is a Thing!”.

Links

• Dave on Twitter
• Sven on Twitter
• John on Twitter
• iOS Dev Weekly
• The Swift Package Index
• Hummingbird
• Revisor
• Plot
• Arena
• Vapor
• Docker
• Orka
• The GitHub package registry pitch on the Swift forums
• Flask
• Django
• Dave’s website
• Sven’s website
• Intro and outro music by Dariusz Dziuk

On this special episode, John is joined by the entire team behind the award-winning apps Halide and Spectre, Apple’s 2019 App of the Year. Ben, Sebastiaan and Rebecca share their stories of how these apps came to life, how they’re working together between design and development, and how technologies like Computational Photography and Augmented Reality are influencing their work.

Sponsor

• Clubhouse: A lightweight, yet powerful project management tool that’s fantastic for remote collaboration. Built specifically for software teams. Sign up for free at clubhouse.io/sundell.

Links

• Ben on Twitter
• Sebastiaan on Twitter
• Rebecca on Twitter
• John on Twitter
• Lux Optics Inc.
• Lux Year 3: The End of the Beginning
• Halide
• Spectre
• Dribbble
• Metal Performance Shaders
• The Vision framework
• Core ML
• The iPad Pro LIDAR sensor and the Esper prototype
• SF Symbols
• Intro and outro music by Dariusz Dziuk

Kyle Lee, also known as Kilo Loco, joins John to go behind the scenes of Publish — the static site generator used to build Swift by Sundell. Also, how to make a code base accessible to new team members, learning from open source, getting started with Swift-based web development, and much more.

Sponsors

• GoodNotes: Apply to work on a popular, Apple-featured app, which makes great use of the latest iOS and macOS technologies. GoodNotes is hiring multiple iOS developers to join their team. Check out goodnotes.com/careers for more info.
• Instabug: Join thousands of companies, including Lyft and eBay, who use Instabug to enhance their app quality and iterate faster. It’s perfect for teams that are working remotely. Go to instabug.com/sundell to start your 14-day free trial.

Links

• Kyle on Twitter
• John on Twitter
• Kilo Loco on YouTube
• Kyle’s video about being hired by AWS
• Kyle’s video tutorial on how to get started with Publish
• Publish
• Plot
• Ink
• The Publish Foundation theme
• CaseIterable
• Vapor
• Cloudflare Workers
• W3Schools
• The Mozilla Developer Network
• AWS Amplify
• Intro and outro music by Dariusz Dziuk

Tobias Due Munk joins John to talk about using SwiftUI to build prototypes, how third party developers can extend SwiftUI’s built-in APIs in various ways, and to discuss the challenges of writing highly dynamic systems in Swift.

Sponsors

• Clubhouse: A lightweight, yet powerful project management tool that’s fantastic for remote collaboration. Built specifically for software teams. Sign up for free at clubhouse.io/sundell.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift, and also check out their new podcast “Mobile DevOps is a Thing!”.

Links

• Tobias on Twitter
• John on Twitter
• Into the Deep
• Prototyping Custom UI in SwiftUI
• A guide to the SwiftUI layout system
• Gui Rambo’s “You can use SwiftUI today” article
• Unwrapping optional SwiftUI views
• Episode with Josh Shaffer from Apple
• SwiftUI View Modifiers
• AnyView
• Storybook for React
• Tobias’s website
• The source code for “Into the Deep”
• Dias
• Intro and outro music by Dariusz Dziuk

Dave Abrahams joins John to talk about Protocol-Oriented Programming and how to make the most out of the Swift Standard Library. Also, discussions on Swift’s overall design, why it puts such a strong emphasis on value types and protocols, and how it’s been influenced by other languages.

Sponsor

NordVPN: Make your Internet connection private and secure, no matter which network that you’re on. Get 50% off their one-year plan at nordvpn.com/sundell, or when using offer code SUNDELL.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• Dave on Twitter
• John on Twitter
• Protocol-Oriented Programming in Swift
• Embracing Algorithms
• Alexander Stepanov
• The C++ Standard Template Library
• Boost
• Enums with custom raw types
• Previous Swift for TensorFlow episode with Paige Bailey and Brennan Saeta
• Sean Parent
• Haskell Type Classes
• AnyCollection
• Specializing protocols
• Type erasure using closures
• Codable
• “The Genuine Sieve of Eratosthenes” by Melissa E. O’Neill
• Swift for TensorFlow open design meetings
• Intro and outro music by Dariusz Dziuk

Christian Selig, creator of the Apollo Reddit app, joins John to talk about building apps against third party APIs, and what sort of criteria an app needs to meet to be considered a “good platform citizen”. Also, REST vs GraphQL, architecting API clients, and more.

Sponsor

Instabug: Join thousands of companies, including Lyft and eBay, who use Instabug to enhance their app quality and iterate faster. It’s perfect for teams that are working remotely. Go to instabug.com/sundell to start your 14-day free trial.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• Christian on Twitter
• John on Twitter
• Apollo
• The Reddit API
• LPLinkMetadata
• Codable
• GraphQL
• The YouTube API
• GitHub’s GraphQL API
• Cloudflare’s GraphQL Analytics API
• Feature flags
• Texture (AsyncDisplayKit)
• Intro and outro music by Dariusz Dziuk

Holly Borla and Grace Kendall, both software engineers at Apple, join John to go on a deep dive into the Swift Playgrounds app and Swift 5.2’s new diagnostics engine. Also, how Swift Playgrounds was ported to the Mac using Catalyst, and Swift’s role in education and as a language for beginners.

Sponsor

NordVPN: Secure all of the internet traffic of up to six devices at once, no matter which network that you’re on. Get up to 70% off your plan at nordvpn.com/sundell when using offer code SUNDELL.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• Holly on Twitter
• Grace on Twitter
• John on Twitter
• Grace and Holly’s WWDC talk from 2018
• Swift Playgrounds
• Assigning a playground’s liveView
• PlaygroundKeyValueStore
• Making a playground execute indefinitely
• An overview of the new diagnostics engine on the Swift blog
• Abstract Syntax Tree
• Opaque return types
• @autoclosure
• Google Summer of Code on the Swift Forums
• The Swift compiler’s source code
• Swift’s bug tracker
• Intro and outro music by Dariusz Dziuk

Leah Culver, co-founder and CTO of the Breaker podcast app, joins John to talk about her journey from iOS developer to startup founder, building MVPs and prototypes, iterating on and maintaining a code base, and growing a development team. Lots of tips and learnings about everything from app architecture to hiring.

Sponsor

• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• Leah on Twitter
• John on Twitter
• Breaker
• Multiline string literals
• Serial podcast
• Figma
• Marvel
• Django
• Alamo Square, San Francisco
• Pink Painted Lady on Instagram
• Pink Painted Lady on Twitter
• Breaker’s iOS audio engineer job listing
• Intro and outro music by Dariusz Dziuk

Ryan Nystrom returns to the show accompanied by designer Brian Lovin, to go behind the scenes of the new GitHub mobile app which the two have been building. Also, creating a design system, building custom controls, and more discussions on how developers and designers can work better together.

Sponsors

• NordVPN: Secure all of the internet traffic of up to six devices at once, no matter which network that you’re on. Get up to 70% off your plan at nordvpn.com/sundell when using offer code SUNDELL.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Ryan on Twitter
• Brian on Twitter
• John on Twitter
• Ryan’s previous appearance on the show
• The Design Details podcast
• GitHawk
• The Swift Unwrapped crossover episode
• UIViewPropertyAnimator
• View models
• IGListKit
• Dribbble
• Ryan’s GitHub profile
• Figma
• Fastlane plugin to remove inactive TestFlight users
• Brian’s website
• Intro and outro music by Dariusz Dziuk

Meng To, founder of Design+Code, joins John to go on a deep dive into SwiftUI from a design perspective, and to talk about how developers and designers can build scalable and flexible UIs using it. Also, structuring view code and components, the power of modifiers, and how SwiftUI compares to other UI tools and platforms.

Sponsors

• RevenueCat: In-app subscriptions made easy. RevenueCat handles the pain points of implementing subscriptions and in-app purchases, so that you can get back to building your app. Learn more at revenuecat.com.
• Zeplin: Improve the collaboration between developers and designers with a single source of truth for assets, fonts and colors, and easily exports designs into Xcode and your app. Learn more at zeplin.io.

Links

• Meng on Twitter
• John on Twitter
• Design+Code
• Meng’s SwiftUI course
• GeometryReader
• ViewModifier
• The frame modifier
• The CSS Flexbox system
• Intro and outro music by Dariusz Dziuk

On this special Stacktrace cross-over episode of the show, Gui Rambo joins John to talk about building custom developer tools, how open Apple’s tooling really is, writing “Swifty” code versus shipping great user experiences, and much more.

Sponsors

• Instabug: Thousands of companies, including Lyft and eBay, rely on Instabug to enhance their app quality and iterate faster. Go to instabug.com/sundell to start your 14-day free trial.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Stacktrace
• Chibi Studio
• WWDC for Mac
• AirBuddy
• JWT tokens
• AssetCatalogTinkerer
• Using SwiftUI to build tools
• Language Server Protocol
• SourceKit
• llbuild
• Building a command line tool using SwiftPM
• Smalltalk
• Haskell
• The Elm architecture
• dotSwift
• Plot
• Rambo’s guest article about AR on WWDC by Sundell
• Imagine Engine
• rambo.codes
• Intro and outro music by Dariusz Dziuk

Sean Allen joins John to kick off the fourth season of the show, by talking about interview processes, goal setting, prioritizing projects, and what we might expect from Swift and Apple’s developer tools in 2020.

Sponsors

• Zeplin: Improve the collaboration between developers and designers with a single source of truth for assets, fonts and colors, and easily exports designs into Xcode and your app. Learn more at zeplin.io.
• Ray Wenderlich: Accelerate the way your team learns new frameworks and technologies with a raywenderlich.com team subscription. Also, get a special discount on the Living by the Code book.

Links

• Sean on Twitter
• John on Twitter
• Sean’s new “Take home project” course
• Sean’s YouTube channel
• Swift for TensorFlow
• Publish
• Vapor
• SourceKit-LSP
• Splash
• Intro and outro music by Dariusz Dziuk

iOS developers and bloggers Donny Wals and Antoine van der Lee join John to wrap up the third season of the show with this year’s Holiday Special. How has Swift changed in 2019, and where might things be headed in 2020? Also, wishes for Xcode Santa, blogging and open source, and much more.

Sponsors

• JetBrains: Try AppCode, the smart IDE for iOS and macOS development, for free for 30 days. Check out what’s new in AppCode, and how JetBrains continue to make their popular developer tool even faster and more capable.
• Bitrise: Fast, stable and highly customizable continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Donny on Twitter
• Antoine on Twitter
• John on Twitter
• Disney Plus
• WeTransfer
• WeScan
• Binary Frameworks in Swift
• Plot
• Swift Concurrency Manifesto
• Donny’s website
• Donny’s “Advent of Swift” bundle
• SwiftLee
• Swift for Good
• Intro and outro music by Dariusz Dziuk

Kate Castellano joins John to discuss how views and UIs can be made more dynamic and data-driven, and how that could even enable certain views to get their entire layout configuration from the server. Also, view models, handling loading states, and much more.

Sponsors

• Ray Wenderlich: Accelerate the way your team learns new frameworks and technologies with a raywenderlich.com team subscription. Also, get a special discount on the Living by the Code book.
• Instabug: Thousands of companies, including Lyft and eBay, rely on Instabug to enhance their app quality and iterate faster. Go to instabug.com/sundell to start your 14-day free trial.

Links

• Kate on Twitter
• John on Twitter
• Women Who Code
• Clue
• Preventing views from being model aware in Swift
• HubFramework
• Kate’s UIKonf talk
• Kate’s Pragma Conference talk
• “Building a Server-driven User Experience” — ASCIIwwdc
• UITableViewDiffableDataSource
• UICollectionViewDiffableDataSource
• Intro and outro music by Dariusz Dziuk

Tim Condon, server-side Swift developer, writer and conference organizer, joins John to talk about all things networking. From organizing and abstracting networking code on the client-side, to using Swift on the server, and how to combine the two in order to write Swift end-to-end.

Sponsors

• Sherlock: The developer tool that gives your iOS simulator superpowers. Try Sherlock for free at sherlock.inspiredcode.io, and use offer code SUNDELL to get a 20% discount.
• Manning: Learn something new with a book or video course from Manning. Browse today’s Deal of the Day, or get a 40% discount on any of their products by going to deals.manning.com/sundell.

Links

• Tim on Twitter
• John on Twitter
• Tim’s blogging engine
• The “Server Side Swift with Vapor” book
• Functional networking in Swift
• PromiseKit
• Implementing Futures & Promises
• Combine’s Future type
• Constructing URLs in Swift
• Vapor
• Kitura
• Smoke
• SwiftNIO
• Swift Talk
• SwiftLog
• The Swift Server Work Group
• SourceKit-LSP
• Online Swift Playground
• The Swift Community Podcast
• Intro and outro music by Dariusz Dziuk

Indie iOS and watchOS developer “Underscore” David Smith joins John to discuss the current state of Apple Watch app development, and how SwiftUI is changing how watchOS apps are built. Also, managing and prioritizing multiple projects, Swift vs Objective-C, and whether SwiftUI is actually production-ready.

Sponsor

Bitrise: Fast, stable and easy to use continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• David on Twitter
• John on Twitter
• David’s website
• CalZones
• Geneva Moon
• Pedometer++
• John’s game engine: Imagine Engine
• WatchConnectivity
• Episode with Josh Shaffer
• ARC (Automatic Reference Counting)
• Under the Radar
• Intro and outro music by Dariusz Dziuk

Josh Shaffer, engineering director with the UIKit and SwiftUI team at Apple, joins John to go on a deep dive into SwiftUI. What inspired the creation and design of SwiftUI, how does it impact the way apps are developed and architected, how is Apple using and improving SwiftUI internally, and much more.

Sponsor

Soulver: The perfect calculation companion for developers. Calculate anything using variables, natural language processing, inline results, and more. It’s like Swift Playgrounds, but for math calculations. Try Soulver for free at soulver.app/sundell, and get a 15% discount using offer code SUNDELL.

Interested in advertising on Swift by Sundell? Check out this page, or get in touch for more information.

Links

• Josh on Twitter
• John on Twitter
• SwiftUI
• Opaque return types
• An example of type-driven development in Swift
• State and Data Flow in SwiftUI
• UITraitCollection
• The Swift 5.1 features that power SwiftUI’s API
• “New Diagnostic Architecture Overview” on the Swift blog
• Intro and outro music by Dariusz Dziuk

John is joined by Paige Bailey and Brennan Saeta from the Swift for TensorFlow team at Google, to talk about the work they’re doing adopting and adapting Swift for Machine Learning. What makes Swift a good fit for this task, how might the language need to evolve to support this type of use cases even better, and much more.

Sponsors

• Instabug: Meet the New Instabug, which helps mobile teams connect with customers, to iterate faster, and to release with a higher degree of confidence. Visit instabug.com/sundell for a free trial, and to get a free Instabug t-shirt when you integrate it into your app.
• Manning: Learn something new with a book or video course from Manning. Get a 40% discount on a great selection of content about Swift, iOS development, and beyond — by visiting deals.manning.com/sundell.

Links

• Paige on Twitter
• Brennan on Twitter
• John on Twitter
• Swift for TensorFlow
• Keras
• AlexNet
• Cloud TPUs
• dynamicCallable
• dynamicMemberLookup
• Google Colab
• Jupyter Notebooks
• fast.ai
• SwiftPlot
• SwiftAI
• “Basics of Swift for Deep Learning” video course
• AlphaGo Zero
• Monte Carlo tree search
• Intro and outro music by Dariusz Dziuk

Adam Bell joins John to talk about audio programming in Swift, and how SwiftUI makes rendering visual representations of audio and other custom shapes easier than ever before. Also, reverse engineering, mixing SwiftUI with UIKit and other view frameworks, and much more.

Sponsors

• Clubhouse: A lightweight, yet powerful project management tool built specifically for software development teams. Now free for up to 10 users! Learn more at clubhouse.io/sundell.
• Bitrise: Fast, stable and easy to use continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Adam on Twitter
• John on Twitter
• Adam’s blog
• Synthesizing Synths in Swift
• Combining Sounds in Swift
• Core Audio
• AudioKit
• AUM - Audio Mixer
• Ableton Live
• Reveal
• Hopper
• AVAudioPlayer
• AVAudioEngine
• AVAudioSession
• AudioToolbox
• Loopy
• AudioKit Synth One
• Texture
• “SwiftUI: Paths vs. Shapes” — objc.io
• Intro by Dariusz Dziuk, outro by Adam

Ish ShaBazz joins John to talk about indie app development, planning and productivity, deciding which system features to adopt and what trends to follow, what’s new in Xcode 11 and Swift 5.1, and much more.

Sponsors

• Bitrise: Fast, stable and easy to use continuous integration. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• Clubhouse: A lightweight, yet powerful project management tool built specifically for software development teams. Now free for up to 10 users! Learn more at clubhouse.io/sundell.

Links

• Ish on Twitter
• John on Twitter
• Ish’s website
• Review Swift by Sundell on Apple Podcasts
• Capsicum
• App: The Human Story
• PencilKit
• SF Symbols
• Intro and outro music by Dariusz Dziuk

Marin Todorov joins John to talk about bridging the gap between UIKit, Combine and SwiftUI, how to design intuitive and robust APIs, and how the developer community can augment Apple’s SDKs through open source.

Sponsors

• Apply Pixels: A fantastic collection of design resources, toolkits and templates for both designers and developers. Get a 30% discount on any purchase by visiting applypixels.com/sundell.
• Clubhouse: A lightweight, yet powerful project management tool built specifically for software development teams. Try Clubhouse for free for two months by going to clubhouse.io/sundell.
• Manning: Learn something new with a book or video course from Manning. Get a 40% discount on a great selection of content about Swift, iOS development, and beyond — by visiting deals.manning.com/sundell.

Links

• Marin on Twitter
• John on Twitter
• Marin’s website
• Combine: Asynchronous Programming with Swift
• Automatic Reference Counting (ARC)
• CombineDataSources
• RxDataSources
• The new standard library diffing API
• Advances in UI Data Sources — WWDC 2019
• Swift KeyPaths
• Monodraw
• Codextended
• Shai Mishali’s Combine publisher library
• Intro and outro music by Dariusz Dziuk

Benedikt Terhechte and Bas Broek join John to dive into iOS 13 and iPadOS, as well as Swift 5.1 — how it powers SwiftUI, and if it would be possible to backport parts of SwiftUI to earlier iOS versions. Also, text editors, new iPhone and iPad UI conventions, and more.

Sponsors

This episode of Swift by Sundell was made possible thanks to three wonderful sponsors. Make sure to check them out to help support this show:

• Clubhouse: A lightweight, yet powerful project management tool built specifically for software development teams. Try Clubhouse for free for two months by going to clubhouse.io/sundell.
• Instabug: Quickly squash bugs with Instabug. Get a 14-day free trial and their brand new t-shirt by integrating Instabug into your app before the 9th of September. Get started at instabug.com/sundell.
• Netatmo: Join Netatmo’s iOS team to work on truly groundbreaking smart home devices, or use offer code SUNDELL to get an exclusive 15% discount on any of their products. Visit netatmo.com/company to learn more.

Links

• John on Twitter
• Benedikt on Twitter
• Bas on Twitter
• AppVenture
• Contravariance
• Swift Weekly Brief
• The Swift Community Podcast with Bas and John
• Visual Studio Code
• SourceKit-LSP
• Episode with Kaya Thomas
• The Swift 5.1 features that power SwiftUI’s API
• Benedikt’s SwiftUI backport
• John’s SwiftUI experiment
• Advances in UI Data Sources — WWDC 2019
• Advances in Collection View Layout — WWDC 2019
• UI Element Colors
• VisionKit
• CryptoKit
• PanelKit
• UIModalPresentationStyle
• Modernizing Your UI for iOS 13 — WWDC 2019
• 7 essential WWDC session videos for iOS developers
• Bas’ website
• Intro and outro music by Dariusz Dziuk

Longtime Apple platforms developer Brent Simmons joins John to discuss how SwiftUI is ushering in a new era for Apple’s developer tools, and how we as third party developers can prepare for it. Also, Mac development, lots of tips for writing efficient code, and dynamic programming in Swift.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• RemObjects Software: Deploy your Swift code beyond Apple’s platforms with Elements from RemObjects. Start easily sharing code, and get more out of your existing Swift skills, by visiting remobjects.com/sundell.
• Duolingo: My favorite app for learning new languages is hiring iOS developers. Apply to work on a massively popular, high-quality Swift app that ships to over 300 million users at duolingo.com/sundell.

Links

• Brent on Twitter
• John on Twitter
• Rate or review Swift by Sundell on Apple Podcasts
• OmniFocus for the web
• Brent’s blog
• Brent’s GitHub projects
• NetNewsWire
• The NeXT Era Ends, the Swift Era Begins
• NSDocument
• UISceneDelegate
• Intro and outro music by Dariusz Dziuk

Casey Liss joins John to talk about Apple’s newly announced Combine framework for reactive programming, how it compares to existing tools like RxSwift, and different strategies for adopting it. Also, unit testing, life as an indie developer, and much more.

Sponsors

• Bitrise: A fast, stable and easy to use continuous integration service. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next software developer job at triplebyte.com/sundell.

Links

• Casey on Twitter
• John on Twitter
• Accidental Tech Podcast
• Analog(ue)
• Vignette
• Gravatar
• John’s work-in-progress HTML DSL
• Casey’s articles on Combine and RxSwift
• Clip from I Love Lucy
• The Swift by Sundell WWDC special
• RxCombine
• Redux
• Unit testing
• Pure functions
• Episode 8 with Marin Todorov and Florent Pillet
• Episode 45 with Chris Eidhof and Matt Gallagher
• Intro and outro music by Dariusz Dziuk

Kaya Thomas joins John to talk about Apple’s various accessibility technologies and how SwiftUI is taking things to a whole new level. Also, how UI testing and accessibility are closely related, and what makes declarative UI development so powerful.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Instabug: Squash bugs much faster with Instabug. Get a 14 day free trial and their brand new t-shirt when you signup and integrate Instabug in your app, by going to instabug.com/sundell.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next software developer job at triplebyte.com/sundell.

Links

• Kaya on Twitter
• John on Twitter
• Calm
• We Read Too
• Kaya’s UIKonf talk
• Xbox Adaptive Controller
• Accessibility for Developers
• Accessibility in SwiftUI
• KIF
• Episode with James Thomson
• Launch arguments in Swift
• Kaya’s website
• Intro and outro music by Dariusz Dziuk

Chris Lattner, creator of Swift, joins John on this 50th episode of the show — to discuss the current state of Swift and how it came to be, as well as to speculate about what the future of the language and its ecosystem might look like.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Manning: Learn something new with a book or video course from Manning. Get a massive 40% discount on a great selection of content about Swift, iOS development, and beyond — by visiting deals.manning.com/sundell.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next software developer job at triplebyte.com/sundell.

Links

• Chris on Twitter
• John on Twitter
• The Swift Community Podcast
• Contribute to the Swift Community Podcast
• Swift Evolution
• Haskell
• LLVM
• Smalltalk
• Swift’s compiler and standard library
• Presentation on MLIR
• “The NeXT Era Ends, the Swift Era Begins” by Brent Simmons
• Jupyter notebooks
• Swift for TensorFlow
• Swift by Sundell newsletter
• Chris’ website
• Intro and outro music by Dariusz Dziuk

It’s time for the 2019 Swift by Sundell WWDC special, featuring PCalc creator James Thomson — who, with his over 25 years of experience developing apps for Apple’s platforms, joins John to discuss SwiftUI, Catalyst, and the other exciting tools and frameworks introduced at this year’s WWDC.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Bitrise: A fast, stable and easy to use continuous integration service. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next software developer job at triplebyte.com/sundell.

Links

• James on Twitter
• John on Twitter
• PCalc
• HyperCard
• WWDC by Sundell
• Swift Package Manager + Xcode 11
• UIWindowSceneDelegate
• SwiftUI
• Combine
• Catalyst
• UIHostingController
• UIViewRepresentable
• Intro and outro music by Dariusz Dziuk

Automation enthusiast and Scriptable developer Simon Støvring joins John to discuss automation, scripting, and building tools. Also, app modularity, frameworks, and what it would take to bring automation on Apple’s platforms to the next level.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Reveal: Inspect, debug, and live-edit your UIs — including views, layers, constraints, and gesture recognizers. Start your free trial at revealapp.com/sundell, and get 25% off your license using offer code SWIFTBYSUNDELL.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next software developer job at triplebyte.com/sundell.

Links

• Simon on Twitter
• John on Twitter
• Scriptable
• Jayson
• Shortcuts
• Pythonista
• JavaScriptCore
• Charles Proxy
• fastlane
• Loco: localise.biz
• Files
• The CommandLine API
• Launch arguments in Swift
• Marathon
• x-callback-url
• Shapeshift
• RECaf
• Intro and outro music by Dariusz Dziuk

iOS developer and YouTuber Mayuko Inoue joins John to discuss team work and how a solid code structure can make teams more productive. Other topics include goal setting, how to grow as an engineer, and contributing to open source.

Sponsors

• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your next Swift developer job at triplebyte.com/sundell.
• Manning: Learn something new with a book or video course from Manning. Get a massive 40% discount on a great selection of content about Swift, iOS development, and beyond — by visiting deals.manning.com/sundell.

Links

• Mayuko on Twitter
• John on Twitter
• Mayuko’s YouTube channel
• Mayuko’s website
• Self-documenting code
• Intro and outro music by Dariusz Dziuk

Michael Ilseman, developer on the Swift team at Apple, joins John to go on a deep dive into the String type, its implementation, and its related APIs. Topics range from the way Swift’s String API is designed, to its underlying complexities, and practical performance tips.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Reveal: Inspect, debug, and live-edit your UIs — including views, layers, constraints, and gesture recognizers. Start your free trial at revealapp.com/sundell, and get 25% off your license using offer code SWIFTBYSUNDELL.
• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your Swift developer dream job at triplebyte.com/sundell.

Links

• Michael on Twitter
• John on Twitter
• “UTF-8 String” on the Swift blog
• SE-0247: “Contiguous Strings”
• The dropFirst method
• String literals in Swift
• “String Essentials”
• “String Consumption”
• SE-0241: “Deprecate String Index Encoded Offsets”
• String’s indices property
• “Piercing the String Veil”
• “The Philosopher's String”, Michael’s try! Swift talk
• Intro and outro music by Dariusz Dziuk

Chris Eidhof and Matt Gallagher join John to discuss app architecture, RxSwift and Functional Reactive Programming, and how to decide what patterns, frameworks, and concepts to adopt when architecting and building an app.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Triplebyte: Apply to work for over 400 top tech companies through one single, fair and efficient interview process. Get a $1000 signing bonus when you find your Swift developer dream job at triplebyte.com/sundell.
• Bitrise: A fast, stable and easy to use continuous integration service. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Chris on Twitter
• Matt on Twitter
• John on Twitter
• Cocoa with Love
• Matt’s article on why he removed his app StreamToMe
• Swift Talk
• The App Architecture book
• MVC
• MVVM
• The Elm architecture
• The power of Continuous Delivery for iOS apps
• Functional Reactive Animation
• RxSwift
• Previous episode with Chris
• Bindable values in Swift
• Futures and Promises
• Intro and outro music by Dariusz Dziuk

Janina Kutyn, former Apple Music developer and now an iOS developer in Amsterdam, joins John for a UI development special! Topics include various techniques for building UIs and layouts, measuring and fixing performance problems, and supporting different screen sizes and devices.

Sponsor: Manning

Manning offers a wide selection of books and courses for Swift developers — ranging from “Getting started with Swift” to “Classic computer science problems in Swift”. Get 40% off any purchase by going to deals.manning.com/sundell and use offer code sundellswift at checkout.

Thanks to Manning for sponsoring this episode. Checking them out using the above link helps support this show.

Links

• Janina on Twitter
• John on Twitter
• Janina’s talk about UI performance
• Core Animation
• The drawRect method
• Using child view controllers as plugins
• UISplitViewController
• CSS Media Queries
• Intro and outro music by Dariusz Dziuk

Dave DeLong, former Apple developer evangelist and now iOS architect and instructor, joins John to talk about handling dates in code, MVC & app architecture, Mac development, and to tell stories of how WWDC is put together.

Sponsor: Instabug

A complete solution for beta testing, bug & crash reporting, and user feedback. Get 20% off any plan when using offer code swiftbysundell2019. Go to instabug.com/sundell to learn more.

Thanks to Instabug for sponsoring this episode. Checking them out using the above link helps support this show.

Links

• Dave on Twitter
• John on Twitter
• Ejector
• Dave’s Syzygy frameworks
• Calendar documentation
• DateComponents documentation
• The builder pattern
• CommitStrip: “Are you any good at it?”
• “A better MVC” article series
• “A better MVC” conference talk
• Episode with Ben Sandofsky
• Dave’s website
• Dave’s GitHub
• Intro and outro music by Dariusz Dziuk

Ted Kremenek, manager of the Languages and Runtimes team at Apple, joins John to talk about Swift 5 — focusing on ABI stability and what it means for the future of the language, how the underpinnings of String have been improved in this release, how Apple is using Swift internally, and much more.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Zeplin: Improve the collaboration between developers and designers with a single source of truth for assets, fonts and colors, and easily exports designs into Xcode and your app. Learn more at zeplin.io.
• Instabug: A complete solution for beta testing, bug & crash reporting, and user feedback. Install their SDK in just a minute and get a free t-shirt by going to instabug.com/sundell.

Links

• Ted on Twitter
• John on Twitter
• ABI Stability and More
• Enforce Exclusive Access to Memory
• Plan for module stability
• String’s ABI and UTF-8
• SwiftNIO
• Reflection in Swift
• Swift’s Reflective Underpinnings
• Intro and outro music by Dariusz Dziuk

Dave Verwer joins John to take a look behind the scenes of the iOS Dev Weekly newsletter, to talk about working as an indie and how to increase your chances of success as an indie creator or developer, juggling multiple projects, as well as iOS development trends.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out to help support this show:

• Instabug: A complete solution for beta testing, bug & crash reporting, and user feedback. Install their SDK in just a minute and get a free t-shirt by going to instabug.com/sundell.
• Bitrise: A fast, stable and easy to use continuous integration service. Automatically build, test and distribute your app on every single commit that you make. Get started for free at bitrise.io/swift.

Links

• Dave on Twitter
• John on Twitter
• iOS Dev Weekly
• Ruby Weekly
• Mailchimp
• Functional networking in Swift
• Time traveling in Swift unit tests
• Ulysses
• John’s game engine
• Curated
• Episode with Ben Sandofsky
• Swift Weekly Brief
• NextDraft newsletter
• Hacker Newsletter
• Dave’s website
• Intro and outro music by Dariusz Dziuk

Ben Sandofsky, the developer behind the camera app Halide, joins John for this season 3 premiere of the show — to talk about designer/developer collaboration, what goes into building a camera app, iOS app architecture, handling dependencies, minimizing an app’s binary size, and much more.

Sponsor: Manning

Get started learning some of the core concepts of Swift and iOS app development, or fill in gaps in your existing knowledge, with Manning’s “Getting started with Swift” book bundle. Three books for a fantastic price — click here to check it out and support the show.

Links

• Ben on Twitter
• John on Twitter
• Halide
• Gui Rambo
• The Design of Everyday Things - Don Norman
• Web Typography - A Book Apart
• The Non-Designer's Design Book - Robin Williams
• Conway's law
• Mike Acton’s “Data-Oriented Design” talk
• John Carmack
• Game Engine Black Book: Doom
• Ben’s article about controller hierarchies
• UIViewController’s show method
• Original Design Patterns book
• Peter Norvig
• Adding Delight to your iOS App - WWDC 2018
• Recode article about the effects of an app’s binary size
• Intro and outro music by Dariusz Dziuk

JP Simard and Jesse Squires, the hosts of Swift Unwrapped, join John for this year's Holiday Special. Topics include ways that Swift has evolved during the year, what's coming up in Swift 5, maintaining open source projects, and continuing the tradition of sending wishes to Xcode Santa.

This is the last episode of season two of this show, which will be back for its third season at the end of January 2019.

Happy Holidays and a Happy New Year! 🎉

Sponsor: Bitrise

This episode of Swift by Sundell was made possible thanks to Bitrise. Easily set up continuous integration and continuously deliver new builds of your app to your team using their fast and friendly platform. Get started for free at go.bitrise.io/swift.

Links

• JP on Twitter
• Jesse on Twitter
• John on Twitter
• Swift Unwrapped
• Swift Weekly Brief
• Ole's "What's new in Swift 4?" playground
• Paul's "What's new in Swift 5?" playground
• The Lost Art of System Design
• Swift Unwrapped episode 67: Raw Strings
• Swift Unwrapped episode 69: Result
• SourceKit-LSP
• Jesse’s website
• Intro and outro music by Dariusz Dziuk

Kristina Fox, iOS and watchOS developer at Intuit, joins John to talk about Apple Watch development, building UI using storyboards vs in code, growing into a senior developer, and how to use change as a learning opportunity.

Sponsor: Bitrise

This episode of Swift by Sundell was made possible thanks to Bitrise. Easily set up continuous integration and continuously deliver new builds of your app to your team using their fast and friendly platform. Get started for free at go.bitrise.io/swift.

Links

• Kristina on Twitter
• John on Twitter
• Kristina's blog
• Silicon Valley TV show
• QuickBooks Self-Employed
• Embracing Change
• WatchConnectivity
• WKInterfaceObject
• Steve Troughton-Smith's watch face prototype
• Lottie
• Visual Format Language
• Intro and outro music by Dariusz Dziuk

Ellen Shapiro joins John to talk about all sorts of automated testing — unit tests, integration tests, UI test, you name it! The two also discuss Ellen's recent adventures into Kotlin and whether Kotlin Native could become a nice cross-platform solution for mobile apps.

Sponsor: Ray Wenderlich

This episode of Swift by Sundell was made possible thanks to Ray Wenderlich. Check out their massive Black Friday sale before November 26th, which lets you sign up for a full year of access to over 1,500 programming videos for only 99$/year, at store.raywenderlich.com.

Links

• Ellen on Twitter
• John on Twitter
• Hum
• Ellen's "Outside-in" talk from UIKonf 2016
• Running UI Tests on iOS With Ludicrous Speed
• UI testing analytics code in Swift
• KIF
• Jake Wharton's whitepaper on Kotlin for Android
• Kotlin Native
• Ellen's Kotlin Native test
• Bakken & Bæck's Kotlin Native test
• What's New in Testing - WWDC 2018
• Ellen's conference talks
• Intro and outro music by Dariusz Dziuk

Max Howell, creator of Homebrew and PromiseKit, joins John to talk about package manager design, asynchronous programming, interview processes, and also to tell some stories of how the Swift Package Manager was born.

Sponsor: Wingu

This episode of Swift by Sundell was made possible thanks to Wingu - an exciting new startup that makes it easy to build location-based apps and features. Start your free trial at wingu.app/sundell, and use offer code SUNDELL15 for 15% off your subscription.

Links

• Max on Twitter
• John on Twitter
• Max's FrenchKit talk
• PromiseKit
• Under the hood of Futures & Promises in Swift
• Episode with Felix Krause
• Mike McQuaid: Robot Pedantry, Human Empathy
• Splash
• Canopy
• Max on GitHub
• Intro and outro music by Dariusz Dziuk

Rahul Malik of Pinterest joins John to talk about working on a large-scale iOS app, using third party build systems, client/server networking architectures and much more.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out, which also helps support the show.

• Manning is giving everyone listening to this show an incredible 40% discount on their massive catalog of programming books. Check out their special Swift by Sundell bundle.
• Amazon Web Services' AppSync lets you easily add GraphQL-powered cloud syncing to your app. Try it, and see how much faster you can iterate on your app with GraphQL combined with Amazon's powerful tools.

Links

• Rahul on Twitter
• John on Twitter
• Facebook's MobileLab post about regression testing
• Build systems a la carte
• Bazel
• Buck
• Texture
• Logic controllers
• Model controllers
• Rahul's GitHub
• Intro and outro music by Dariusz Dziuk

Brandon Williams and Stephen Celis, formerly iOS developers at Kickstarter and now hosts of Point-Free, join John to talk about functional programming in Swift, and how it can be used to build apps, websites, and even control the world.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors. Make sure to check them out, which also helps support the show.

• Amazon Web Services' AppSync lets you easily add GraphQL-powered cloud syncing to your app, and using their Amplify command line tool, you can take working with GraphQL in Swift to a whole new level.
• Instabug is a super comprehensive bug and crash reporting SDK that takes just a few minutes to integrate. Get started for free and get a limited edition t-shirt before the 30th of October.

Links

• Brandon on Twitter
• Stephen on Twitter
• John on Twitter
• Point-Free
• The Functional Swift Conference
• Protocols with Associated Types - Alexis Gallagher
• UIKit Styling with Functions
• Server-Side Swift from Scratch
• SwiftNIO
• Episode with Tanner Nelson of Vapor
• swift-html
• iOSSnapshotTestCase
• DVR
• Stephen's NSSpain talk
• John's system design talk
• Functional core, imperative shell
• Stephen's website
• Intro and outro music by Dariusz Dziuk

Nick Lockwood, Core Animation veteran and creator of tools like SwiftFormat, joins John to talk about animations, layout, building parsers & compilers in Swift, declarative UI patterns and much more.

Sponsor: Amazon Web Services

Special thanks to Amazon Web Services for sponsoring this episode! AWS AppSync lets you easily add GraphQL-powered cloud syncing to your app, and using the Amplify command line tool, you can take working with GraphQL in Swift to a whole new level.

Check out Amazon's powerful iOS developer tools at aws.amazon.com/appsync.

Links

• Nick on Twitter: @nicklockwood
• John on Twitter: @johnsundell
• SwiftFormat
• iCarousel
• Imagine Engine
• Beyond Animations with Core Animation
• Core Animation documentation
• Layout
• Unbox
• Splash
• libSyntax
• Episode with Harlan Haskins and Robert Widmann
• Intro and outro music by Dariusz Dziuk

John heads to the Swift & Fika conference in Stockholm and, equipped with his portable recorder, speaks to four special guests about topics ranging from security to rendering performance to static analysis.

Featuring

• Alek Åström, the co-organizer of the Swift & Fika conference.
• Anastasiia Vixentael, security & encryption specialist.
• Janina Kutyn, ex-Apple Music developer & iOS developer at Adyen.
• JP Simard, creator of SwiftLint & Swift Unwrapped co-host.

Links

• Alek on Twitter: @misteralek
• Anastasiia on Twitter: @vixentael
• Janina on Twitter: @janinakutyn
• JP on Twitter: @simjp
• Swift & Fika videos
• Everyone is an API designer
• Themis
• Janina's talk from UIKonf
• Imagine Engine
• Swift Unwrapped
• Jazzy
• SourceKit
• Splash
• SwiftFormat
• Intro and outro music by Dariusz Dziuk

Felix Krause, creator of fastlane, joins John to talk about building developer tools, scaling open source projects, automation, code signing, how fastlane came to be, and how to take the perfect Twitter profile picture.

Sponsor: Bitrise

This episode of Swift by Sundell was made possible thanks to Bitrise - a fast, reliable and easy to use continuous integration platform for your apps & projects. Build, test and even ship your app on every single commit (with fastlane!). Get started for free at bitrise.io/swiftbysundell.

Links

• Felix on Twitter: @KrauseFx
• John on Twitter: @johnsundell
• krausefx.com
• whereisfelix.today
• fastlane
• Episode with Orta
• Trusting 3rd party SDKs
• iOS Dev Weekly
• fastlane's Swift support
• Episode with Tanner Nelson about Vapor
• Felix on GitHub
• Intro and outro music by Dariusz Dziuk

Sean Allen, YouTuber and host of Swift News, joins John to talk about sharing, creating content for the Swift community, mentoring and giving feedback, teaching new technologies, interviewing and much more.

Sponsor: Bitrise

This episode of Swift by Sundell was made possible thanks to Bitrise - a fast, reliable and easy to use continuous integration platform for your apps & projects. Build, test and even ship your app on every single commit. Get started for free at bitrise.io/swiftbysundell.

Links

• Sean on Twitter
• John on Twitter
• Sean's website
• Sean's YouTube channel
• John's first ever conference talk
• Using pinned notes in Apple Notes
• Sean's Patreon
• Stacktrace Patreon
• Intro and outro music by Dariusz Dziuk

Niels van Hoorn of Framer joins John to talk about prototyping, experimentation and learning new technologies. When and how to use prototypes, trying out new frameworks and techniques, the value of building your own tools and much more.

Sponsor: AppSpector

This episode of Swift by Sundell was made possible thanks to AppSpector - a brand new developer tool that lets you inspect and debug your app completely remotely. Check it out and get started for free at appspector.com/sundell.

Links

• Niels on Twitter: @nvh
• John on Twitter: @johnsundell
• Framer
• Swift Island
• Swift Alps
• Swift Aveiro
• TestDrive
• InVision
• Flinto
• John's prototyping talk from ADDC
• Niels on GitHub
• Intro and outro music by Dariusz Dziuk

Peter Steinberger, creator and CEO of PSPDFKit, joins John to talk about building and maintaining a large framework project, how PSPDFKit came to be, how his team works with Radar, and all the challenges and excitement that comes with running a business based on a closed source SDK.

Sponsors

This episode of Swift by Sundell was made possible thanks to two wonderful sponsors - make sure to check them out:

• Instabug is a super comprehensive bug and crash reporting SDK that takes just a few minutes to integrate. Get started for free and get 25% off any paid plan at instabug.com/sundell.
• Bitrise offers fast, reliable and easy to use continuous integration for your apps. Build, test and even ship your app on every single commit. Get started for free at bitrise.io/swiftbysundell.

Links

• Peter on Twitter: @steipete
• John on Twitter: @johnsundell
• PSPDFKit
• John's UI testing talk from UIKonf
• AFNetworking
• Fixing What Apple Doesn't
• Drag and drop in PSPDFKit
• Brisk
• PSPDFKit's new UI implementation
• PDF Viewer app
• Intro and outro music by Dariusz Dziuk

Ryan Nystrom of Instagram joins John to talk about data-driven UI development, working on open source, how to optimize performance, becoming an engineering manager and much more.

Sponsor: Bitrise

Special thanks to Bitrise for sponsoring this episode and for their continued support of this show! Bitrise offers fast, reliable and easy to use continuous integration for your iOS apps.

🚀 Sign up for free at bitrise.io/swiftbysundell.

Links

• Ryan on Twitter
• John on Twitter
• IGListKit
• GitHawk
• ComponentKit
• Redux
• HubFramework
• Intro and outro music by Dariusz Dziuk

David Hart, regular contributor to the Swift Package Manager, joins John to discuss the present and future of the SwiftPM project - how to get started both using and contributing to it, and how it lets the community build tools on top of it.

Sponsor: Bitrise

Special thanks to Bitrise for sponsoring this episode! Bitrise offers fast, reliable and easy to use continuous integration for your iOS apps.

🚀 Sign up for free at bitrise.io/swiftbysundell.

Links

• David on Twitter: @dhartbit
• John on Twitter: @johnsundell
• The Swift Package Manager
• Swift Package Manager documentation
• David's talk at App Builders
• AnyCollection
• CaseIterable
• Marathon
• bugs.swift.org
• Trusting third party SDKs, by Felix Krause
• David on GitHub
• Intro and outro music by Dariusz Dziuk

Ben Scheirman, creator of NSScreencast, joins John for a special WWDC episode of the show — to talk about the cool new things that Apple announced at the conference. iOS 12's focus on performance, UIKit apps on the Mac, what's new in Xcode and Swift 4.2, and much more.

Sponsor: Bitrise

Special thanks to Bitrise for sponsoring this episode! Bitrise offers fast, reliable and easy to use continuous integration for your iOS apps.

🚀 Sign up for free by using this link.

Special NSScreencast discount

Ben is offering all Swift by Sundell listeners 30% off the first 3 months of an NSScreencast subscription.

📺 Use this link to get the discount.

Links

• Ben on Twitter: @subdigital
• John on Twitter: @johnsundell
• UIBezierPath
• AppDevDiary
• Vibrato.fm
• NSUserActivity
• Marco Arment's blog post about watchOS audio APIs
• Overcast
• Chameleon
• Logging - Apple Developer Documentation
• The Magic of UI Testing - YouTube
• iStat Menus
• What's new in Swift - WWDC Videos
• Ben's website
• Ben on GitHub
• Intro and outro music by Dariusz Dziuk

Carola Nitz joins John to talk about LLDB and debugging, her work on the open source VLC app, how she got her previous job at Apple, and much more.

Sponsor: Instabug

Special thanks to Instabug for sponsoring this episode! Instabug makes it super easy to get good feedback and crash reports from your testers and users. Sign up for free here and use offer code SUNDELL to save 25% off any paid plan.

Competition: Win a free ticket to ADDC

The ADDC conference is giving away 3 free tickets to Swift by Sundell listeners! Share a link to your favorite episode of the show on Twitter and add the hashtag #sundelladdc to enter the competition. Winners will be picked randomly on the 1st of June.

Links

• Caro on Twitter
• John on Twitter
• Caro's debugging talk at UIKonf
• VLC
• The VLC iOS app on GitHub
• Cracking the Coding Interview
• LLDB
• Advanced Debugging book
• Visual Debugging with Xcode, WWDC 2016
• Chisel
• Picking the right way of failing in Swift
• Launch arguments in Swift
• Caro on GitHub
• Intro and outro music by Dariusz Dziuk

Harlan Haskins and Robert Widmann, who are both regular contributors to the Swift compiler, join John to take a deep dive into the internals of Swift, its type system, the compilation process and how they used LLVM to build their own programming language.

Links

• Harlan on Twitter
• Robert on Twitter
• John on Twitter
• Harlan and Robert's talk at App Builders
• Trill
• Silt
• Agda
• LLVM
• LLVMSwift
• libSyntax
• Conor McBride's talk
• LLVM Kaleidoscope tutorial
• Swift Intermediate Language (SIL)
• Robert's 3SAT Gist
• Conditional conformances in Swift
• Swift Forums
• Swift JIRA
• Swift for TensorFlow
• Episode with Meghan Kane about Machine Learning
• Harlan's try! Swift talk about libSyntax
• LLVM Swift Slack
• Harlan's website
• Intro and outro music by Dariusz Dziuk

Meghan Kane joins John for a special Machine Learning episode of the show — talking about how to get started with tools like CoreML and TensorFlow, what they can be used for, deciphering the terminology, how Swift might be used for ML tooling in the future, and much more!

Sponsor: Bitrise

Special thanks to Bitrise for sponsoring this episode! Bitrise offers fast, reliable and easy to use continuous integration for your iOS apps.

🚀 Sign up for free by using this link

Links

• Meghan on Twitter: @meghafon
• John on Twitter: @johnsundell
• Apple Machine Learning
• Mobile Machine Learning 101 Glossary by Jameson Toole
• ImageNet competition
• Meghan's talk at App Builders
• CoreML
• Metal Performance Shaders
• Accelerate framework
• Zyl, the ML-powered photo app
• Nuru, the app to detect crop disease in Africa
• TensorFlow
• Turi Create
• TensorFlow for poets
• CoreMLTools
• TensorFlow to CoreML Converter
• MobileNets
• Swift for TensorFlow
• Meghan's course on Udacity
• fast.ai
• Meghan's website
• Meghan's GitHub
• Intro and outro music by Dariusz Dziuk

Benedikt Terhechte joins John to talk about Mac development, working as an indie developer, code sharing between Apple's platforms, extending the standard library, system packages, and much more.

Sponsor: Bitrise

Special thanks to Bitrise for sponsoring this episode! Bitrise offers fast, reliable and easy to use continuous integration for your iOS apps.

🚀 Sign up for free by using this link.

Links

• Benedikt on Twitter: @terhechte
• John on Twitter: @johnsundell
• Benedikt's blog: appventure.me
• Cocoa Bindings
• NSView
• NSWindow
• NSViewController
• NSOutlineView
• The Stacktrace podcast
• Benedikt's blog post about Optional extensions
• Conditional conformances in Swift
• John's String.isNilOrEmpty extension
• Benedikt's blog post about system packages in Swift
• The Rust programming language
• ShellOut
• Paw
• Benedikt's GitHub profile
• Intro and outro music by Dariusz Dziuk

Radek Pietruszewski, software writer at Nozbe and creator of SwiftyUserDefaults, joins John to talk about developer seniority, being inspired by the React paradigm, singletons & dependency injection, micro features and much more.

Links

• Radek on Twitter: @radexp
• John on Twitter: @johnsundell
• DHH
• Nozbe
• The Podcast
• SwiftyUserDefaults
• Unbox
• Swifty methods
• Seniority - Krzysztof Zabłocki
• Functional Reactive Programming - Wikipedia
• Higher-order components in React
• The Hub Framework
• DiffyTables
• Episode with Mike Ash
• Avoiding singletons in Swift
• Pedro Piñera's Micro Features guidelines
• Twitter poll about the format of the show
• Radek's GitHub profile
• Radek's blog - radex.io
• Intro and outro music by Dariusz Dziuk

Erica Sadun joins John to talk about Swift Evolution and its proposal process, civility in the community, the state of Apple's developer tools, protocol extensions, Swift Foundation vs Objective-C Foundation and much more.

Sponsor

Big thanks to Ray Wenderlich for sponsoring this episode. Visit store.raywenderlich.com to get a 20% discount on the new Android Avalanche bundle until March the 30th.

Links

• Erica on Twitter
• John on Twitter
• Erica's website - ericasadun.com
• The Swift Evolution repository
• The Swift Evolution forum
• "Introducing role keywords to reduce hard-to-find bugs" - Swift Evolution forum
• "Unwrap or die" operator proposal
• The Stacktrace Podcast
• "Adding toggle to Bool" Swift Evolution proposal
• Proposal for removing C-style for-loops
• Intro and outro music by Dariusz Dziuk

Tanner Nelson, creator of the Vapor web framework, joins John to talk about the present & future of server-side Swift, designing Vapor’s API, Apple’s new SwiftNIO project, marrying the concepts of Swift with the web, and much more.

Links

• Tanner on Twitter
• John on Twitter
• Vapor
• Vapor Cloud
• Server Side Swift with Vapor, the book - Ray Wenderlich
• Server Side Swift with Vapor, the video series - Ray Wenderlich
• Fluent on GitHub
• Laravel
• SwiftNIO on GitHub
• Netty
• Chris Lattner's post about concurrency in Swift
• TCP - Wikipedia
• TLS - Wikipedia
• Quic - The Chromium Projects
• Protocol Buffers - Google Developers
• The Vapor Slack: vapor.team
• Intro and outro music by Dariusz Dziuk

Janie Clayton, author of the Metal Programming Guide, joins John to talk about Metal, GPU & graphics programming, shaders, when to dive into lower levels of abstraction, and much more.

Links

• Janie on Twitter
• John on Twitter
• Metal Programming Guide on Amazon
• Metal Programming Guide on InformIT
• Janie's game development blog
• Janie's regular blog
• GameplayKit - Apple Developer
• Game Development for App Developers
• Metal - Apple Developer
• RWDevCon 2018
• objc.io's Metal article
• Open GL ES - Khronos Group
• Metal Performance Shaders - Apple Developer
• OpenGL Shading Language - Wikipedia
• Metal Shading Language Specification - Apple Developer
• Intro and outro music by Dariusz Dziuk

Sommer Panage joins John to talk about all things accessibility, adaptive UIs, learning new APIs, UI testing, her secret (well, not so secret) life as a circus artist, and much more.

Links

• Sommer on Twitter
• John on Twitter
• Making your iOS App Accessible - Apple Developer
• WWDC app for Mac
• Ole Begemann's "What's new in Swift 4" playground
• Sommer's UIKonf talk about accessibility
• API for waiting for an element in a UI test
• Intro and outro music by Dariusz Dziuk

Chris Eidhof, founder of objc.io and co-host of Swift Talk, joins John to talk about app architecture, functional programming, the "rockstar developer culture", picking database solutions and much more.

Links

• Chris on Twitter: @chriseidhof
• John on Twitter: @johnsundell
• objc.io
• App Architecture book
• Functional programming - Wikipedia
• "Building an enum-based analytics system in Swift"
• DSL: Domain-specific language - Wikipedia
• UICollectionViewLayout - Apple Developer Documentation
• Kickstarter's iOS app - GitHub
• Git as a Document Format - Wil Shipley
• Separation of concerns using protocols in Swift
• Intro and outro music by Dariusz Dziuk

Tobias Due Munk, creator of Slør, Nataliya Patsovska from iZettle and Patrick Balestra, co-organizer of the Swift Alps & AppBuilders conferences, join John on this special holiday episode of the show! Personal stories about learning new technologies, staying motivated, profound career moments, conferences, wishes for Xcode Santa and much more.

Happy holidays and a happy new year to all of you! 🎉

Links

• Tobias on Twitter
• Nataliya on Twitter
• Patrick on Twitter
• John on Twitter
• Slør on the App Store
• iZettle
• AppBuilders conference
• Productivity
• Tweet about running Xcode + the iOS simulator in full screen
• Intro and outro music by Dariusz Dziuk

Orta Therox from Artsy joins John to talk about building developer tools, working on and maintaining open source projects, React Native, balancing coding time with personal time and much more.

Links

• Orta on Twitter: @orta
• John on Twitter: @johnsundell
• Artsy
• CocoaPods
• Danger
• Marathon
• Specta
• Expecta
• Pragmatic Testing
• React Native
• TypeScript
• JavaScriptCore - Apple Developer Documentation
• Open Source by Default - Artsy Engineering
• Moya Community Continuity Guidelines
• Orta's DNA
• Orta/Life
• Lake Orta - Wikipedia
• Intro and outro music by Dariusz Dziuk

Matthias Tretter of MindNode joins John to talk about Auto Layout, working on the iPad, refactoring Massive View Controllers, dealing with old code and much more.

Links

• Matthias on Twitter
• John on Twitter
• MindNode
• Episode with Gui Rambo
• NSTextAlignment - UIKit Documentation
• Accessibility on iOS - Apple Developer
• CGRectDivide - Core Graphics Documentation
• WTF Auto Layout
• "A micro Auto Layout DSL" - Chris Eidhof
• "Using child view controllers as plugins in Swift"
• UITableViewController - UIKit Documentation
• UIDocumentBrowserViewController - UIKit Documentation
• Intro and outro music by Dariusz Dziuk

Mike Ash joins John to talk about reference counting, learning new APIs, Swift tooling vs new language features, what if Swift would've been Objective-C 3.0, and much more.

Links

• Mike on Twitter: @mikeash
• John on Twitter: @johnsundell
• Plausible Labs
• Friday Q&A
• isKnownUniquelyReferenced() - Swift documentation
• CFGetRetainCount() - Core Foundation documentation
• Swift 4 Weak References
• Conditional conformances - Swift Evolution
• Mike's GitHub
• Intro and outro music by Dariusz Dziuk

Soroush Khanlou joins John to talk about blogging, MVVM and other iOS architecture patterns, unit testing, new features in iOS 11 & Xcode 9 and much more.

Links

• Soroush on Twitter: @khanlou
• John on Twitter: @johnsundell
• khanlou.com
• Container View Controllers
• Using tokens to handle async Swift code
• Under the hood of Futures & Promises in Swift
• Minority Report's gesture-based user interface - YouTube
• UIView.safeAreaInsets - UIKit documentation
• MVVM is Not Very Good
• Facade pattern - Wikipedia
• Cyclomatic complexity - Wikipedia
• Interviewing, with Erica and Sara - Fatal Error
• Intro and outro music by Dariusz Dziuk

Paul Hudson of Hacking with Swift joins John to talk about learning & teaching Swift, Storyboards vs XIBs vs code, game development, Swift on the server and much more.

Links

• Paul on Twitter: @twostraws
• John on Twitter: @johnsundell
• Hacking with Swift
• Crowdcast
• Swift Community Awards
• Kathy Sierra - O'Reilly
• Spaced repetition - Wikipedia
• Duolingo
• Stevia - GitHub
• EasyPeasy - GitHub
• SnapKit - GitHub
• Dive Into SpriteKit
• Imagine Engine - GitHub
• Unity
• Cocos2D
• Build Engine - Wikipedia
• Microsoft XNA - Wikipedia
• Vapor - GitHub
• Kitura - GitHub
• Stencil - GitHub
• Intro and outro music by Dariusz Dziuk

Marin Todorov and Florent Pillet, two of the four authors of Ray Wenderlich's RxSwift book, join John to talk about Rx, reactive programming, debugging, learning new technologies and much more.

Links

• Marin on Twitter: @icanzilb
• Florent on Twitter: @fpillet
• John on Twitter: @johnsundell
• Ray Wenderlich's RxSwift book
• RxSwift on GitHub
• RxSwift documentation on GitHub
• RxSwift example app on GitHub
• Adam Borek’s blog
• Debugging - RxSwift documentation
• NSLogger on GitHub
• List of apps using RxSwift - AppSight
• ReactiveCocoa on GitHub
• Marin’s website: underplot.com
• Intro and outro music by Dariusz Dziuk

Gui Rambo joins John to talk about reverse engineering, finding product details in leaked Apple firmware & SDKs, getting started with Mac development & open source, and much more.

Links

• Gui on Twitter
• John on Twitter
• Gui's open source projects
• WWDC app for macOS
• Delphi programming language - Wikipedia
• Hopper
• CAARPlayer
• Touch Bar API documentation
• Gui's patreon
• Intro and outro music by Dariusz Dziuk

Agnes Vasarhelyi of Topology Eyewear joins John to talk about moving to San Francisco, AR, architecture, getting started with iOS development and much more.

Links

• Agnes on Twitter: @vasarhelyia
• John on Twitter: @johnsundell
• Topology Eyewear on the App Store
• Graphics Programmer - Topology Eyewear jobs
• Intro and outro music by Dariusz Dziuk

Louis D'hauwe joins John to answer questions about architecture, UI design, compilers, creating a programming language and much more.

Links

• Louis on Twitter: @LouisDhauwe
• John on Twitter: @johnsundell
• Louis' blog & website
• Pixure on the App Store
• Susan Kare, Iconographer - Vimeo
• PanelKit
• The Lioness Programming Language
• MVC - Apple
• MVVM - Wikipedia
• VIPER - objc.io
• "So you want to write an interpreter?" by Alex Gaynor - YouTube
• Chris Lattner on the Accidental Tech Podcast
• Do you plan to rewrite the Swift compiler in Swift? - Swift FAQ, Apple
• Intro and outro music by Dariusz Dziuk