Stacktrace

It’s time for John and Rambo to play another round of Apple Keynote Poker! This time the two place their bets as to what Apple might introduce during the WWDC22 keynote and State of the Union session.

Links

• WWDC22
• Mark Gurman’s report about lock screen widgets
• SwiftUI’s Table view

Organizing workspaces and hobby projects, the pros and cons of view models and controllers, and rendering Core Animation layers within SwiftUI view hierarchies.

Links

• The Jarvis standing desk
• The iOS App Icon Book
• SwiftUI’s state management system
• Publish
• SwiftUI’s List component
• AirBuddy desktop widgets announcement tweet
• SwiftUI’s accessibilityRepresentation modifier
• The recent Swift by Sundell episode with Chris Eidhof
• ChibiStudio

A deep dive into how WidgetKit and SwiftUI’s serialization mechanism works under the hood, why John removed the ads from the Swift by Sundell website, and the discontinuation of the last iPod model.

Links

• 5 years of Swift by Sundell
• The landing page for Rambo’s new Brazilian podcast network
• WidgetKit
• SwiftUI
• XPC
• NSSecureCoding
• NSProxy
• Swift key paths
• Hopper
• Swift’s @main attribute
• Configuring a widget with an intent
• NSUserActivity
• Apple’s iPod touch press release

Balancing refactoring with feature development, abstracting system services, and building delightful UIs.

Links

• Kaleidoscope
• Using warning and error directives
• Rambo’s new UI for AirBuddy’s Spatial Audio support
• Assertions in Swift

Custom macOS virtualization on Apple Silicon, the pros and cons of SwiftUI’s List view, initial thoughts on WWDC 2022, and why Italy is such an amazing place.

Links

• SwiftUI’s List view
• Rambo’s new AirBuddy UI
• AirBuddy’s custom widget sheet
• Virtualizing macOS on Apple Silicon
• Asahi Linux
• WWDC 2022 announcement

New website, new logo, same show! Rambo shares his initial impressions of using Apple’s new Studio Display, along with some interesting spelunking results. Also, behind the scenes of the show’s new website, and a few web development tips.

Links

• RSS
• Publish
• Sweep
• Chrome’s Lighthouse testing suite
• Studio Display
• Rambo’s new desk setup

John and Rambo celebrate the show’s 4th birthday with a big announcement, and then talk about security research, project priorities, and how to combine SwiftUI views with protocol-based observable objects.

Links

• The first ever episode of the show
• The show’s new email: [email protected]
• Rambo’s blog post about his CVE
• Steve Jobs’s joke about iMovie on the App Store
• Demo of John’s SwiftUI-based game
• Modeling loading states using enums
• Protocol inheritance/specialization
• Reflection in Swift

John and Rambo share their first impressions of the products announced at Apple’s “Peek Performance” event — including the new iPhone SE and iPad Air, M1 Ultra, Mac Studio and the Studio Display.

Sponsors

• Journey: Get 10% off the new Journey cases for iPhone with code JOURNEY10.

• Kandji: A modern, cloud-based platform to manage and secure your Mac, iPhone, iPad, and Apple TV devices. Kandji saves IT teams hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• Apple’s “Peek Performance” event
• The Banker on Apple TV+
• “There is only one MTLDevice on M1 Ultra.”
• Mac Studio
• Studio Display

On this extra episode of the show, John and Rambo share their bets, hopes and predictions for Apple’s upcoming “Peek Performance” event.

Sponsors

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today. New users can use the code 'STACKTRACE' during sign-up to get 3 free months of Sentry.

• Kandji: A modern, cloud-based platform to manage and secure your Mac, iPhone, iPad, and Apple TV devices. Kandji saves IT teams hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• Upgrade
• Mac Studio rumors

Unit testing SwiftUI-based views, view and data architecture, as well as a behind the scenes look at Rambo’s home automation setup.

Sponsor

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today. New users can use the code 'STACKTRACE' during sign-up to get 3 free months of Sentry.

Links

• Unit testing SwiftUI-based views
• SwiftUI’s state management system
• The “Locks and Keys” principle
• Philips Hue
• Fibaro switches
• Zigbee
• Shelly 2.5

John and Rambo speculate what the SDK for Apple’s rumored AR/VR devices might look like, and what sort of user experiences that we might be able to build using it.

Sponsor

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today. New users can use the code 'STACKTRACE' during sign-up to get 3 free months of Sentry.

Links

• realityOS references in Apple’s open source code
• SwiftUI
• ARKit
• RealityKit
• Google Cardboard
• Blender
• Rambo’s AR article from 2019
• Reality Composer
• Quixel
• UIKit scenes
• Apple AR/VR headset renders
• IKEA Place

SwiftUI for animations, prototyping, and game development. Plus, a second review of the M1 Max-based MacBook Pro, and an update on how well it performs for gaming.

Sponsor

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today. New users can use the code 'STACKTRACE' during sign-up to get 3 free months of Sentry.

Links

• Rambo’s MacBook Pro specs
• Divinity: Original Sin 2
• SpriteKit
• Imagine Engine
• John’s new SwiftUI-based game demo
• Part of the source code from John’s new game
• SwiftUI animations
• The SwiftUI Namespace API
• Custom SwiftUI view modifiers
• SwiftUI transactions

How memory management works when using Swift’s new concurrency features, getting out of productivity traps, remote pair programming, and the process of installing Mac apps.

Sponsor

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today. New users can use the code 'STACKTRACE' during sign-up to get 3 free months of Sentry.

Links

• Memory management when using async/await in Swift
• Swift’s closure capturing mechanics
• AppZapper
• The dmg file format
• The pkg file format

Continued discussions around using SwiftUI for custom animations and layouts, more on phased rollouts and prioritizing bug fixes, content exclusivity and acquisitions, and various ways of sharing code across Apple’s platforms.

Sponsor

• Sentry: Actionable iOS error tracking and performance monitoring. Try Sentry for free today.

Links

• Yoshi's Instagram
• Asset catalog namespacing
• “Microsoft buys Activision Blizzard for $68.7B” — Polygon
• “Sony acquiring Bungie, creators of Destiny, in $3.6B deal” — Polygon
• Wordle
• Eero
• Call of Duty
• Starfield
• Customizing how an external Swift type is encoded or decoded
• Using compiler directives in Swift
• Bridging SwiftUI with UIKit or AppKit
• Dave DeLong’s article about building cross-platform frameworks
• Managing dependencies using the Swift Package Manager

John and Rambo revisit the topic of SwiftUI and UIKit interoperability, and discuss which of the two UI frameworks that’s recommend for beginners to start with. Also, the launch of AirBuddy 2.5, and using phased rollouts when releasing new app versions.

Links

• SwiftUI and UIKit interoperability
• Rambo’s HostingWindowController
• Sparkle
• Paddle
• Rambo’s “AirBuddy 2.5 development trivia” Twitter thread

Stacktrace is back! On this first episode of 2022, John and Rambo talk about their holidays, using Swift Playgrounds to build apps on the iPad, Mac gaming, and project goals.

Links

• Gastropod
• Rambo’s implementation of the App Library animation
• Ink
• Plot

Join John and Rambo on this special New Year’s Eve episode of Stacktrace, on which they celebrate some of their favorite moments, products, media, and learnings from 2021.

Sponsor

• ALOGIC: Get 10% off ALOGIC"S new BLAZE Docks & Hubs with code ALOGIC10. Enter the MacBook Pro giveaway.

Links

• Upgrade
• Raycast
• WWDC by Sundell & Friends
• Duolingo
• Xbox Game Pass
• Payoneer
• Rambo’s WWDC article about StoreKit 2
• John’s WWDC article about the new UIButton system
• Plot Components
• The Expanse
• Foundation
• Truth be Told
• Ted Lasso
• Metroid Dread
• The Forgotten City

John and Rambo share their first impressions of the newly released Swift Playgrounds 4, which enables developers to build full iOS apps right on the iPad. Also, the value of narrowly scoped open source libraries, and what it’s like using GitHub CoPilot in practice.

Links

• Gumroad
• Paddle
• Cloudflare Workers
• GitHub CoPilot
• Discover Concurrency on Swift by Sundell
• CollectionConcurrencyKit
• AsyncCompatibilityKit
• SimplyCoreAudio

The importance of sleep for both humans and async tasks, transferring apps and Apple developer accounts, and what things John and Rambo carry in their bags at all times.

Links

• Pillow (disclaimer: has sponsored the show in the past)
• Delaying an async Swift Task
• Swift’s closure capturing mechanics
• Rambo’s new company website

John and Rambo discuss software quality trends, async functions and unit testing, Apple’s approach to private data with CloudKit, and dealing with technical debt.

Links

• Using CloudKit for content hosting and feature flags
• CloudKit Web Services
• Functional networking in Swift
• Rambo roasting his own code on Twitter

It’s time for the first ever Stacktrace Headphone Holiday Guide! Along with discussions about writing technical articles, view models and the MVVM design pattern, and using Swift actors to solve race conditions and data races.

Sponsors

• Shortcut: The project management tool built specifically for software development teams. Start your extended two-month free trial at shortcut.com/sundell

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• NetNewsWire
• Tilt
• CloudKit 101
• Common pitfalls when using Keychain Sharing on iOS
• Swift actors: How do they work, and what kinds of problems do they solve?
• Beats Studio Buds
• Steelseries Arctis 7X
• View models
• SwiftUI’s state management system
• Combine subjects
• John “The Lost Art of System Design” talk
• Rambo’s “MVC: Many View Controllers” talk

Rambo shares his set of principles for when and how to rewrite existing Objective-C code in Swift, John talks about his preferred workshop formats, and the two discuss the current state of Apple’s services.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Connecting async/await to other Swift code
• SwiftUI and UIKit interoperability
• Periphery
• notify_register_dispatch
• Property wrappers
• The Shrink Next Door on Apple TV+
• Foundation on Apple TV+

John and Rambo discuss asynchronous unit testing, using Windows as a development platform, SwiftUI previews on laptops, and conclude their deep dive into Swift’s concurrency system by talking about actors and structured concurrency.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Unit testing Swift code that uses async/await
• Test expectations
• Unit testing in Swift
• Raspberry Pi Pico
• IOKit
• Audacity
• Actors in Swift
• The MainActor attribute
• Using async let to run multiple tasks in parallel

Rambo longs to get back to UI development, John releases a new open source project, and the two embark on part one of their deep dive into Swift’s new concurrency system. Also, organizing devices, and mechanical keyboards.

Sponsors

• Shortcut: The project management tool built specifically for software development teams. Start your extended two-month free trial at shortcut.com/sundell

• RevenueCat: RevenueCat makes it easy to build and manage in-app purchases on iOS, Android, and the web. Learn more.

Links

• Swift by Sundell episode with Christian Selig
• CollectionConcurrencyKit
• The new, concurrent version of Publish
• Async sequences and streams
• Sketch
• NSXPCConnection
• Swift’s concurrency system
• The WIP MultipeerKit concurrency implementation
• Adding pull-to-refresh to a SwiftUI List using async/await
• Making URLSession’s async APIs backward compatible
• Task
• An example of running async unit tests on Linux
• Keychron K2

John shares his first impressions of the new 14-inch MacBook Pro and how he has been utilizing Swift’s new concurrency features to get the most out of the M1 Max. Also, Rambo’s work with Shortcuts, maintaining SwiftUI-based Mac apps, and much more.

Sponsors

• Survivor: Protect your iPhone 13 w/ Survivors new MagSafe collection and enter to win the iPhone 13 Pro.

• RevenueCat: RevenueCat makes it easy to build and manage in-app purchases on iOS, Android, and the web. Learn more.

Links

• Using SwiftUI to build internal tools
• John’s MacBook Pro box tweet
• Swift’s new concurrency system gains backward compatibility in Xcode 13.2
• Publish

After a discussion about Swift generics and when to use them, Rambo shares his initial impressions of using the new iPad mini, and John explains why he’s going back to the Mac for his portable computing needs.

Sponsors

• Kandji: A modern, cloud-based platform to manage and secure your Mac, iPhone, iPad, and Apple TV devices. Kandji saves IT teams hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

• RevenueCat: RevenueCat makes it easy to build and manage in-app purchases on iOS, Android, and the web. Learn more.

Links

• Swift generics
• Plot’s NodeConvertible protocol
• Avoiding SwiftUI’s AnyView
• Pull Request adding SharePlay support to the WWDC app for Mac
• Rambo’s SharePlay WWDC article
• Rambo’s Instagram
• Pixelmator Photo

The 14 and 16-inch Apple Silicon-based MacBook Pros have finally been revealed, and John and Rambo share their initial impressions of these new products and everything else that Apple announced during their “Unleashed” event.

Sponsors

• Kandji: A modern, cloud-based platform to manage and secure your Mac, iPhone, iPad, and Apple TV devices. Kandji saves IT teams hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

• RevenueCat: RevenueCat makes it easy to build and manage in-app purchases on iOS, Android, and the web. Learn more.

• Totallee: Get 20% off totallee iPhone 13 cases and more with code SLEEK at totalleecase.com or (SLEEK20DEAL on Amazon).

Links

• The Moiré effect
• High-resolution version of John’s 3x iPhone 13 Pro photo of Warsaw’s Palace of Culture and Science
• The new Beats Fit Pro earbuds
• New AppKit API for retrieving the area next to the notch on the new MacBook Pros

John and Rambo share their bets, hopes, and predictions for Apple’s upcoming “Unleashed” event. Will we finally see a new, Apple Silicon-powered MacBook Pro, and what other products might make an appearance at the event? Also, SwiftUI backward compatibility, and re-prioritizing projects in preparation for new OS releases.

Sponsor

• Shortcut: The project management tool built specifically for software development teams. Start your extended two-month free trial at shortcut.com/sundell.

Links

• Poker scorecard
• AirBuddy
• Property wrappers in Swift
• SwiftUI backward compatibility
• Swift’s “Library evolution” effort

John gets back into game development, Rambo builds a custom Bluetooth packet parser for AirBuddy, and the two embark on another technical deep dive — this time into the big topic of performance tuning.

Links

• Imagine Engine
• John’s SwiftUI game demo
• Rambo’s debug app for inspecting BLE advertisements
• Synalyze It!
• Sets in Swift
• Time complexity
• Entity Component System (ECS)
• cloc

What it’s been like for John to upgrade from the iPhone X to the iPhone 13 Pro, Rambo’s continued adventures into the depths of Bluetooth LE, and opinions on the final production versions of iOS 15 and iPadOS 15.

Sponsors

• Western Digital: Get a special deal on the latest My Passport SSDs from WD in select configurations for a limited time. Enter the 9to5Mac and Western Digital M1 iMac giveaway.

• Incipio: Check out their new MagSafe case for the iPhone 13 lineup with 12ft drop protection and ultra-responsive press fit buttons. Also available to purchase at Verizon.com or your local Verizon store.

Links

• Previewing SwiftUI views in landscape
• Using compiler directives in Swift
• The Feedback number for Rambo’s macOS bug: FB9642258
• Accidental Tech Podcast
• Halide

After discussing various refactoring strategies and app extensions for iOS apps running on the Mac, John and Rambo dive into the latest App Store news, how Apple TV+ compares to its competitors, and how to switch networking environments within a beta app.

Links

• Non-optional optionals
• The “Locks and Keys” principle
• Chibi Studio
• Epic vs Apple ruling
• The outcome of the Japan Fair Trade Commission’s recent investigation into the App Store
• Apple TV+ wins big at the Emmys
• fastlane

John and Rambo share their first impressions of the products announced at Apple’s “California Streaming” event — including the iPhone 13 lineup, the new iPad "Classic" and iPad mini, and the Apple Watch Series 7.

Sponsor

• iMazing: Get the Swiss Army Knife of iOS device management for Mac and Windows 30% off for a limited time.

Links

• Combine
• John’s tip on how to visualize Combine output
• Apple’s “California Streaming” event video
• Ted Lasso

After a few brief discussions about distributed systems and preparing code bases for Apple’s new operating systems, John and Rambo place their bets as to what Apple might announce during their upcoming “California Streaming” event. Will we see the iPhone 13, an Apple Watch Series 7, or perhaps something brand new?

Sponsor

• Decluttr: Trade-in your iPhone or other device with a 28 day price lock and get an extra 10%* cash back with code 9TO5MAC (*$30 cap).

Links

• StatusBuddy
• AirBuddy
• UINavigationBar’s new scrollEdgeAppearance API
• The UIAppearance proxy API

John and Rambo discuss the iOS 15 beta process, the latest round of App Store debates, Swift concurrency backward compatibility, and whether Apple should embrace a more continuous delivery process for new APIs and system features.

Sponsor

• Things: The award-winning to-do app for iPhone, iPad, and Mac — now with Markdown support!

Links

• rambo.codes
• Files
• TestFlight for Mac beta
• FusionCast TestFlight beta
• Doug Gregor’s Swift concurrency PR
• Apple’s press release about its App store “updates”
• “Apple loosens rules for developers in major concession amid antitrust pressure” - The Washington Post
• The StatusBuddy code base

On this 150th episode of the show, John and Rambo go on a series of accidental deep dives into universal links, how Catalyst and AppKit can be integrated, and more. Also, what does being a technical leader entail, and what’s the current state of Swift Evolution?

Sponsor

• Baseus: Get a special deal on the new Baseus 10,000mAh portable Mag-Safe charger and power bank with code 9TO5MACBASE.

Links

• Data Jar
• Swift by Sundell episode with Simon Støvring
• Accessibility audio graphs
• SwiftUI’s accessibilityRepresentation API
• DistributedNotificationCenter
• Navigation in Swift
• Showing view controllers, rather than pushing them
• Dismissing a SwiftUI modal or detail view
• Swift for TensorFlow
• Combining dynamic member lookup with key paths

Prompted by recent rumors around a redesigned Apple Watch, John and Rambo discuss the state of the Watch as a platform, both as users, and from a development perspective. Also, managing an app’s colors, getting started with freelancing, and NSOperations.

Sponsors

• Chargeasap: Get a special preorder deal on the new 25,000 mAh Flash Pro Plus portable charger.

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Working Copy
• Secure ShellFish
• Swift Playgrounds
• Defining dynamic colors in Swift
• CARROT Weather
• NSOperation/Operation
• Advanced NSOperations from WWDC 2015

John’s new iPad development setup, Rambo’s widget layout challenges, and Apple’s (lack of a strong) home device strategy. Also, managing deadlines, maintaining SwiftUI views across multiple system versions, and continuous integration.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Publish
• Working Copy
• SwiftUI layout priorities
• Report: Apple lacks a ‘strong living room hardware strategy,’ still planning HomePod/Apple TV combo for 2023
• Klipsch The Fives
• fastlane
• Bitrise
• Jenkins

Rambo’s initial impressions of the Playdate developer tools, John’s process for keeping articles and sample code up to date, Google’s new Tensor chip, and designer/developer collaboration.

Sponsors

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

• Bitrise: Click here to learn more and set up your app's continuous integration and delivery.

Links

• John’s article about Swift’s Result type
• Raspberry Pi Pico
• Raspberry Pi 400
• Visual Studio Code
• CircuitPython
• MicroPython
• Playdate
• Lua
• Google Tensor

After an accidental deep dive into Git branching strategies and a discussion about app-wide data models, John and Rambo talk about the recent news that Netflix is getting into gaming, and what that could mean both content-wise and technically.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Bitrise
• Feature flags in Swift
• Beats Studio Buds
• AirBuddy
• Non-optional optionals
• Managing objects using Locks and Keys
• Gurman’s report about Netflix getting into video games
• Netflix’s Q2 earnings report
• Black Mirror: Bandersnatch
• CARROT Weather

John and Rambo discuss some of the most recent Apple hardware rumors, how they’ve been John and Rambo discuss how they use unit testing to verify their code, and how automatic testing fits into their overall workflows. Also, more details about Rambo’s new app, and strategies for adding new features to existing code bases.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Mazury
• SwiftUI’s minimumScaleFactor modifier
• SwiftUI’s blendMode modifier
• Unit testing
• Swift Evolution

John and Rambo discuss some of the most recent Apple hardware rumors, how they’ve been changing their style of programming since the introduction of SwiftUI and Combine, and whether Swift package manifests could one day replace Xcode project files. Also, why does John always call Rambo by his last name?

Sponsor

• ALOGIC: Get 20% off the new ALOGIC DX2 and DX3 Docking Stations now for a limited time and enter the MacBook Air giveaway.

Links

• StatusBuddy
• Raphael, the designer behind Rambo’s app icons
• Published properties in Swift
• The source code for StatusBuddy
• MacRumor’s iPhone 13 video
• Recent MacBook Pro rumors about 32 GB RAM limit

John and Rambo discuss the recent announcement of GitHub Copilot and the implications that such a tool could have on the world of software development. Also, deciding between SwiftUI and UIKit on a component level, and the power of relaxation.

Links

• CSS media queries
• How Swift 5.3 enhanced SwiftUI’s DSL
• Handling loading states within SwiftUI views
• The recent Swift by Sundell episode with Chris Lattner
• GitHub Copilot
• Express
• “GitHub Copilot is not infringing your copyright”, by Julia Reda

It’s the Stacktrace App Store special! What could happen if Apple were to enable sideloading on iOS, and what other changes could Apple make to improve the App Store and its relationship to third-party developers? Also, connecting Combine with async/await, using design tools, alternatives to using analytics SDKs, and much more.

Links

• StatusBuddy
• Calling async functions within a Combine pipeline
• Xbox Cloud Gaming
• John’s Xbox Cloud Gaming setup
• The Touryst
• The JavaScript GamePad API
• WebRTC
• AppTelemetry
• TablePlus
• Cloudflare

John’s new daily writing challenge, Rambo’s continued deep dives into Bluetooth and local networking, and initial impressions of Apple Music Spatial Audio. Also, what might the future of technologies like Objective-C and Combine look like, given this year’s WWDC announcements?

Links

• Brazilian cuisine
• Swedish “fika”
• Customizing how an external Swift type is encoded or decoded
• MultipeerKit
• “Made for Spatial Audio” on Apple Music
• Shadow of the Tomb Raider
• Create ML
• Carbon
• What Swift’s new concurrency features might mean for the future of Combine
• SwiftUI’s new pull-to-refresh API
• iA Writer
• Publish
• Splash
• Ulysses

John and Rambo dive much deeper into some of the key new APIs and system features that were announced at WWDC21, including SharePlay, ShazamKit, Swift’s new concurrency system, and what’s new in Xcode 13. Also, debugging low-level crashes, and tips for getting started with app development.

Links

• WWDC by Sundell & Friends
• Swift by Sundell episode with Doug Gregor from Apple
• Git’s bisect command
• AirBuddy
• ShazamKit
• SharePlay
• Beta of the unofficial WWDC app with SharePlay support
• SwiftUI’s new Table view for macOS
• Swift’s new AttributedString type
• John Gruber’s original Markdown spec
• The MainActor attribute
• Converting completion handler-based APIs to async/await
• What’s new in Xcode 13
• John’s package collection on the Swift Package Index
• Xcode Cloud
• Buddybuild
• Bitrise
• Stanford University’s iOS development course
• 100 days of Swift
• Swift Playgrounds
• Sean Allen’s YouTube channel

John and Rambo discuss some of the major new announcements from Apple’s WWDC21 keynote, and how they might impact developers building apps for Apple’s platforms.

Sponsors

• CleanMyMac X: CleanMyMac X is the essential decluttering app for Mac. Get 5% off for a limited time.

• MacStadium: MacStadium is the leading provider of enterprise-class cloud solutions for Mac and iOS app development. Whether you need a Mac cloud for large-scale CI/CD or a single Mac mini to test your iOS app, MacStadium has a solution for all your Mac development needs.

Links

• Avoiding ‘WWDC stress’
• Swift by Sundell episode with Sean Allen
• AVPlayer
• Apple’s “Made for Spatial Audio” playlist

It’s time for another game of Stacktrace Keynote Poker! This time, John and Rambo place their bets on what Apple might announce at WWDC21, either during the main keynote, or as part of the more developer-focused State of the Union.

Sponsors

• iMazing: Stacktrace listeners can download iMazing for 30% off for a limited time.

• Keep Going: A new book from indie developer Bardi Golriz on how to create award-winning apps in 12 months. Use code "rambo" for $10 off.

Links

• NSUbiquitousKeyValueStore
• CloudKit
• Codable’s Property List-based encoding API
• WWDC by Sundell & Friends
• Publish
• John’s tweet about the upcoming Publish Gallery
• Combine
• Docker

WWDC preparations, the challenge of building features that rely on wireless communication between devices, Apple’s latest accessibility announcements, and another semi-deep dive into Swift’s Result Builders feature.

Sponsors

• WALTR PRO for Mac: Make it easy to transfer virtually any file (in any format) to your iPhone, iPad, iPod and now, HomePod. Get 30% off now.

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• AirBuddy
• Bonjour
• Multipeer Connectivity
• The unofficial WWDC app for macOS
• Apple’s Developer app
• WWDC by Sundell & Friends
• The RSS feed for WWDC by Sundell & Friends
• NetNewsWire
• iA Writer
• Apple’s accessibility press release
• Dark Noise
• UINavigationBar
• Result builders
• Plot’s ComponentBuilder
• John’s write-JavaScript-in-Swift experiment

After narrowly avoiding an accidental web development deep dive, John and Rambo discuss the challenges of open source maintenance, AirBuddy’s upcoming battery notifications feature, the latest Mac-related rumors, and the new Apple Music hi-fi update.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• The latest progress update on Plot’s CSS features
• Apple Music’s new hi-fi features
• “No one actually needs hi-res Apple Music audio”, by Jason Cross
• A new MacBook Pro might be coming as soon as this summer
• Apple is apparently preparing a revamped MacBook Air with M1 successor
• A 40-core Mac Pro with Apple Silicon, plus a high-end Mac mini, are rumored to be in development

John and Rambo go on a deep dive into Plot’s new SwiftUI-like API for building HTML pages, and discuss 3D printing, API evolution and documentation, whether Apple ever considered letting third party developers ship apps outside of the iOS App Store, and how to pick what projects to pursue.

Sponsors

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

• Kandji: A modern, cloud-based platform for centrally managing and securing your Mac, iPhone, iPad, and Apple TV devices, saving IT teams countless hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• Rambo’s 3D printer
• Thingiverse
• 3D printed case for attaching an AirTag to the Apple TV remote
• Plot
• Publish’s Foundation theme
• Swift’s Result Builders feature
• “How I hacked the Apple AirTags”, by stacksmashing
• “Epic and Apple are now fighting over a naked banana” on The Verge
• Apple’s document about third party iOS apps, shared by Steve Troughton-Smith on Twitter
• Go
• Rust
• Haskell

After checking in on the progress of Rambo HQ 2.0 and a visit to John’s Static Site Generation Corner, John and Rambo briefly discuss the ongoing trial between Apple and Epic Games, and then dive into topics like project planning and how to pick what server-side framework to use for a new project.

Sponsor

• Kandji: A modern, cloud-based platform for centrally managing and securing your Mac, iPhone, iPad, and Apple TV devices, saving IT teams countless hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• The Thread network protocol
• Plot
• Preview of Plot’s new Component-based API
• John’s chart of article word counts
• Node.js
• Vapor
• GraphQL
• Cloudflare Workers

Organizing Combine-based code, the security of smart home devices, whether the Apple TV is gaining eARC support, and how to use compiler directives and launch arguments to customize an app at both compile time and runtime.

Sponsor

• tomtoc: Shop the new PadFolio for iPad and get 20% off from tomtoc.

Links

• Combine
• John’s 2017 conference talk “Everyone is an API designer”
• August Smart Lock Pro
• Apple TV might be getting eARC support
• Using compiler directives in Swift
• Launch arguments in Swift

John and Rambo discuss all of the major announcements from Apple’s “Spring Loaded” event, including the new iMac, AirTags, the M1-powered iPad Pro, and the updated Apple TV. Also, the key factors that can help make a code base easier to navigate, and the benefits of going all-in on HomeKit.

Links

• Apple’s “Spring Loaded” event
• John’s iPad external display demo

It’s finally time for another round of Apple Event Keynote Poker, with John and Rambo placing their bets as to what Apple might announce during their “Spring Loaded” event on April 20th. Also, the power of HTTP, SwiftUI for AR, Swift’s Result Builders feature, and more.

Sponsors

• ALOGIC: Get 30% off the ALOGIC Rapid USB-C Wall Charger on Amazon [Amazon UK] and enter the iPad Pro giveaway.

• Linode: Get $100 in free credit to Develop, deploy, and scale your modern applications faster and easier.

Links

• Rambo’s new microphone
• John’s podcasting equipment
• The Blue Yeti microphone
• Google Cloud
• Firebase
• HTTP
• URLSession
• curl
• Paw
• Protobuf
• Dave DeLong’s series on HTTP in Swift
• Managing URLs and endpoints in Swift
• Result builders
• Publish
• Annotating properties with result builder attributes

John and Rambo talk about Kara Swisher’s recent interview with Tim Cook, Apple’s upcoming App Tracking Transparency initiative and the new additions to Apple Arcade, and classic vs modern UIKit. Also, behind the scenes of this year’s April Fools’ jokes, and a somewhat unique #askStacktrace segment.

Sponsor

• Linode: Get $100 in free credit to Develop, deploy, and scale your modern applications faster and easier.

Links

• iOS Dev Weekly
• Modern UICollectionView APIs
• UICollectionViewFlowLayout
• Codable
• Using property wrappers to customize Codable
• Codextended
• SwiftSiri
• AirBuddy Buddies
• FanFan
• The source code for FanFan
• Imagine Engine’s macOS display link implementation
• Kara Swisher’s interview with Tim Cook
• App Tracking Transparency
• Apple Arcade’s recent expansion

John is excited about SwiftUI animations, Rambo updates the unofficial WWDC app, Xiaomi resurrects AirPower, and Apple announces WWDC21. Also, the latest Apple TV rumors, and what’s good to keep in mind when hosting a Hackathon.

Sponsor

• Linode: Get $100 in free credit to Develop, deploy, and scale your modern applications faster and easier.

Links

• The unofficial WWDC app for macOS
• Apple’s official Developer app
• SwiftUI animations
• UIView’s animate API
• UIKit animation options
• Rambo’s animation talk from BA: Swiftable
• Swift by Sundell Discover: Combine
• Apple’s WWDC21 press release
• Rambo’s tweet about Apple’s WWDC announcement artwork
• Xiaomi’s version of AirPower
• Report on the new Apple TV remote

Rambo launches a new app, John has thoughts about SwiftUI’s heavy usage of Swift’s type system, and it turns out that there might be more to the HomePod mini than meets the eye.

Sponsors

• Linode: Get $100 in free credit to Develop, deploy, and scale your modern applications faster and easier.

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Rambo’s new app: PhotoStapler
• PhotoKit
• The SwiftUI layout system
• Core ML
• The DeepLab ML model
• TensorFlow
• Bindable SwiftUI list elements
• UIAppearance
• Mark Gurman’s latest report about the HomePod mini

Optimizing the performance of SwiftUI views, mixing client work with indie development, Apple’s recent discontinuation of the original HomePod, and what it takes to provide really good feedback and bug reports when testing an app.

Sponsors

• VMware Workspace ONE: A true Unified Endpoint Management platform that manages all device types on all platforms across all use cases, including macOS and iOS. Try for free.

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Picking between a computed property and a method
• Lazy properties
• StateObject
• Instruments
• TechCrunch’s article about the HomePod discontinuation
• Michael Kukielka’s tweet about HomePod shipping with an older iOS version
• AirPort Express

Rambo picks up Android development, John is continuing to turn into a Mac developer, and the two discuss the recent discontinuation of the iMac Pro and how developers can improve the way they communicate with other team members.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• ScrollViewProxy
• Building modern collection views
• NSTableView
• NSScrollView
• Xiaomi Redmi Note 9
• Fork

Localizing an indie app, the stability of SwiftUI previews, various ways of storing and handling app data, and whether Apple might be building a general-purpose cloud computing platform.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• OneSky
• Apple’s XLIFF localization file format
• Swift by Sundell episode featuring Eliza Block from Apple
• Core Data
• Realm
• Keychain Services
• SwiftNIO

App Clip analytics, building macOS apps using SwiftUI, Apple’s initial response to the latest App Store scams, speculation about what a potential Apple March event might include, and getting started with unit testing.

Sponsor

• Pillow: Pillow is an all-in-one sleep tracking solution to help you get a better night’s sleep. Download it from the App Store today.

Links

• Chibi Studio’s App Clip
• How Rambo built his App Clip
• Apple cracks down on apps with ‘irrationally high prices’
• Apple March event rumors
• Discover unit testing on Swift by Sundell

After a deep dive into various ways of making Swift interact with C++ code, as well as the latest AirBuddy and humidifier hack updates, John and Rambo discuss the recent discontinuation of Swift for TensorFlow, and whether open sourcing commercial projects is a good idea.

Links

• Objective-C++
• “Swifty Objective-C” on the PSPDFKit blog
• CF_SWIFT_NAME
• The board that Rambo uses for his humidifier hack
• PodcastMenu
• ObservableObject
• Rambo’s “You can use SwiftUI today” article
• Swift Argument Parser
• Killed by Google
• Swift for TensorFlow
• Combining dynamic member lookup with key paths
• Publish

Rambo hacks a humidifier, John is excited about linting and continuous integration, and the two discuss the most recent set of exposed App Store scams and what Apple could do to improve the situation. Also, SwiftUI jobs and minimum deployment targets.

Sponsors

• Funn Media: Live a healthier life with Funn Media's collection of apps for iPhone, iPad, Mac, and Apple Watch, including Calory, WaterMinder, and more.

• Kandji: A modern, cloud-based platform for centrally managing and securing your Mac, iPhone, iPad, and Apple TV devices, saving IT teams countless hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• Raspberry Pi Zero W
• Arduino
• Bitrise
• SwiftLint
• SwiftLint’s “File Name” rule
• The recent set of exposed App Store scams
• FlickType

John and Rambo discuss some of the key new features that are being introduced in iOS 14.5 and Xcode 12.5, as well as their preferred debugging workflows, and how to deal with tech debt and refactoring in a pragmatic and sustainable way.

Sponsors

• Guardian Firewall: Advanced security and privacy control for your iPhone and iPad, powered by the team who spent years reverse-engineering iOS to help you take back control. Download the app to receive 3 days free with zero commitment or $10 off Guardian Pro at www.guardianapp.com/stacktrace.

• Kandji: A modern, cloud-based platform for centrally managing and securing your Mac, iPhone, iPad, and Apple TV devices, saving IT teams countless hours of manual work with features like one-click compliance templates and 150+ pre-built automations, apps, and workflows. Request access.

Links

• John’s SwiftUI articles
• Avoiding SwiftUI’s AnyView
• Emitting custom compiler warnings
• SwiftLint
• Apple’s Core ML Models
• An overview of what’s new in iOS 14.5
• Xcode 12.5 beta release notes

The joy of writing apps using SwiftUI and modern UIKit, a review of the AirPods Max, will FaceID come to the iMac anytime soon, and what sort of things are good to consider when working with third party SDKs and frameworks?

Links

• Building modern collection views
• How SwiftUI can now be used to build entire iOS apps
• Mark Gurman’s latest report on new Macs
• Using Swift compiler directives

John and Rambo react to the latest Mac and iPhone rumors, design a new feature for AirBuddy, talk about Swift Evolution and not-quite-public language features, and discuss various ways of using frameworks and libraries on Apple’s platforms.

Links

• John’s article about accessing a Swift property wrapper’s enclosing instance
• The Swift Evolution proposal for property wrappers
• Bloomberg’s latest reports
  • New iMac, Mac Pro, and external monitor
  • New MacBook Pros
  • Foldable iPhones
  • The Power Mac G4 Cube
  • Swift Package Manager
  • Linking an Xcode target to frameworks and libraries

Rambo goes indie, John realizes once again how important breaks are, and the two discuss the latest rumors around Apple’s AR glasses in great detail, all the way down to the API design level. It’s Stacktrace, after all.

Links

• Rambo’s indie announcement
• Summary of the latest “Apple Glasses” rumors
• Microsoft HoloLens
• Pessimists Archive
• WidgetKit
• Siri intents

On the final holiday special for this year (or, last year?), John and Rambo discuss their expectations for 2021, and what products and new developer tools that they hope to see from Apple during this new year.

Sponsor

• MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here.

Links

• AirTags expectations
• Swift Package Manager

On this second Stacktrace holiday special, John and Rambo look back at the past year and what some of the highlights were among the hectic, strange rollercoaster ride that 2020 has been.

Sponsor

• MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here.

Links

• Building an App Clip
• SwiftUI
• Getting started with WidgetKit
• Swift by Sundell Discover
• FusionCast
• AirBuddy

On the first ever completely non-technical episode of Stacktrace, John and Rambo answer #askstacktrace questions about everything from local holiday traditions to what their favorite airplanes are.

Sponsor

• MacStadium: Get a cloud hosted M1 Mac mini from $99 or use promo code 9TO5MAC for half off the first two months of a Gen 3 or 4 (Intel) mini. Enter the Mac mini giveaway here.

Links

• Christmas in Brazil
• Christmas in Sweden
• Christmas in Poland
• Panettone
• “Billie Jean” by Michael Jackson on Apple Music and Spotify
• “Telegraph Road” by Dire Straits on Apple Music and Spotify

An accidental deep dive into how the AirPods’ transparency mode is activated over Bluetooth, the launch of Swift by Sundell 3.0, running macOS code in the cloud, multiple headphone reviews and a comparison between the iPhone 12 Pro and 12 mini.

Links

• Grand Central Dispatch
• CloudKit
• Beats Flex
• Steelseries Arctis 7X
• Splash

More on using the M1 Macs as development machines, thoughts on the newly announced AirPods Max and its pricing, the importance of maintaining URLs as stable identifiers, and how AirBuddy is made aware of new audio devices.

Links

• AirPods Max in James Thomson’s Dice app
• Apple introduces AirPods Max
• Steelseries Arctis 7x headphones
• rbenv

On this slightly more code-focused episode of the show, John and Rambo discuss cross-platform SwiftUI development and techniques for integrating SwiftUI with UIKit and AppKit. Also, how the original HomePod can now be jailbroken, using the M1 Mac mini for gaming, and much more.

Sponsor

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

Links

• Screenshot of John’s Cloudflare analytics app
• FusionCast
• First-generation HomePod can now be jailbroken with Checkra1n
• SwiftUI and UIKit interoperability
• Published properties in Swift

John reviews the M1 Mac mini, and Rambo reviews the iPhone 12 mini. Two “mini products” that turn out to be not very mini in terms of performance. What’s it like using an M1 Mac for tasks like iOS development, and does the iPhone 12 mini feel like a proper flagship phone in 2020?

Sponsor

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

Links

• FusionCast
• Swift by Sundell Discover
• GraphQL
• Cloudflare’s GraphQL-based analytics API
• Combine
• YouTube video about testing Logic Pro X on the M1 Mac mini
• M1 Mac workaround appears to allow up to 6 external displays
• Managing dependencies using the Swift Package Manager

Apple’s lower App Store commission, the future of Swift by Sundell, shipping AirBuddy 2, M1 Mac benchmarks, SwiftUI’s potential as a cross-platform technology, and a review of the Xbox Series X. Yes, all of that in one episode — let’s dive in!

Sponsor

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

Links

• The AirBuddy Help Center
• Apple announces App Store Small Business Program
• iOS 14.3 will suggest third-party apps to users during the iPhone or iPad setup process
• iOS 14.3 beta includes support for rumored AirTags and third-party tracking accessories
• Matthew Panzarino’s review of the M1 MacBook Pro
• The Verge’s review of the M1 MacBooks
• The new isiOSAppOnMac property
• Xbox Series X

The first round of Apple Silicon Macs is finally here, and John and Rambo have lots of thoughts on them. Also, adventures into Multipeer Connectivity and Bluetooth, and mixing development work with design.

Sponsors

• Appfigures: The tools you need to monitor, optimize, and get more downloads. Use code Stack3030 to get 30% off for the next 3 months.

• CleanMyMac X: Try CleanMyMac X for free & get 30% off to optimize and clean your Mac.

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

Links

• AirBuddy 2
• Using compiler directives in Swift
• Multipeer Connectivity
• Swift by Sundell Discover: Unit Testing
• Sketch
• Apple event video

It’s time for John and Rambo to place their bets on what Apple might announce at their upcoming “One More Thing” event. Will we see the first Apple Silicon-powered Macs, and if so, which ones, and what features will they have? Also, artisanal, hand-crafted JSON from Brazil, and computer-generated CSS from Poland.

Sponsors

• Survivor: Refined Rugged protection for all iPhone 12 models.

• Appfigures: The tools you need to monitor, optimize, and get more downloads. Use code Stack3030 to get 30% off for the next 3 months.

Links

• John’s CSS generation experiment
• Function builders
• Phantom types
• The builder pattern
• Poker scorecard

The story and implementation behind Swift by Sundell Discover, how and why AirBuddy 2 will have an onboarding process, thoughts and comments on the new Apple Silicon-powered iMac rumors, home screen customization hacks, and a deep dive into balancing code-level details with shipping great products.

Sponsors

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

• Incipio: Get 20% off cases for all iPhone 12 models with exclusive code: STACKTRACE.

• totallee: Get 25% off totallee's iPhone 12 cases for a limited time with code PODCAST.

Links

• Swift by Sundell Discover
• SE-0289: Result Builders on the Swift forums
• Rambo’s talk about app architecture
• objc.io
• Dependency injection using functions

The success of the AirBuddy 2 pre-orders is immediately followed by a classic Rambo shopping spree, John continues to explore Swift’s function builders feature, and the two discuss the initial reviews of the iPhone 12 and 12 Pro, the new HomePod home theatre mode, and how their names are actually pronounced.

Sponsor

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

Links

• AirBuddy 2
• TechCrunch’s coverage of AirBuddy 2
• Swift’s function builders feature
• Plot
• John’s experiment with adding a Component API to Plot
• WWDC by Sundell & Friends
• The upcoming HomePod home theatre mode

On this extra long episode of Stacktrace, John and Rambo discuss all of the exciting new announcements from Apple’s October 2020 event, including the new iPhones, the new HomePod Mini, and more. Also, John is building a major new feature for his website and Rambo launches the pre-orders for AirBuddy 2.

Sponsors

• Appfigures: : The tools you need to monitor, optimize, and get more downloads. Use code Stack3030 to get 30% off for the next 3 months.

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

• Decluttr: Trade-in your old Apple device with a 10% cash bonus and 28-day price lock guarantee now.

Links

• Pre-order AirBuddy 2
• Paddle
• Publish
• Pessimists Archive
• Video of the Apple event

Building and using iOS widgets, the community’s adoption of SwiftUI, an update on whether game streaming services are now viable on iOS, multiple ways of using view models, and Swift’s new Windows compatibility.

Sponsors

• Honeybadger: Exception and uptime monitoring for application developers. Tell them 9to5Mac/Stacktrace sent you and get 30% off for 6 months.

• RavPower: Get the new RAVPower 65W 4-Port Desktop USB-C Charging Station for $39 (Reg $59) with code 9TO5MACRP.

Links

• Keynote Poker scorecard
• Getting started with WidgetKit
• John’s experimental Swift by Sundell widget
• The Keychron K2
• xcode-switch
• Tool for creating Xcode playgrounds

Building and using iOS widgets, the community’s adoption of SwiftUI, an update on whether game streaming services are now viable on iOS, multiple ways of using view models, and Swift’s new Windows compatibility.

Sponsor

• DEVONthink: Manage your documents the smart way on Mac and iOS. Get 10% off with code 9to5mac-2020.

Links

• Chibi Studio’s intro clip with Spatial Audio support
• See
• Amazon Luna
• No, iOS 14 widgets can’t secretly steal private info with your keyboard
• Different flavors of view models in Swift
• Swift on Windows
• DirectX

Building responsive app UIs, the launch of iOS 14, and thoughts on the Apple One bundle and some of its international pricing. Also, the return of both #askstacktrace and Stacktrace Arcade, as well as how using iCloud might affect the transferability of an app.

Sponsor

• Chargeasap: Preorder the Omega 200W or 100W GaN USB-C Charger for 55% off. And enter our MacBook Pro giveaway!

Links

• SwiftUI’s frame modifier
• CSS media queries
• SwiftUI’s GeometryReader view
• Widgetsmith
• Scriptable
• Chibi Studio’s App Clip
• try! Swift World (Rambo's workshop is sold out)
• AVAudioEngine
• CMHeadphoneMotionManager
• A Monster's Expedition Through Puzzling Exhibitions
• A Good Snowman is Hard to Build
• The Witness

It’s Apple event analysis time! John and Rambo discuss all of the major announcements from Apple’s “Time Flies” event — including the Apple Watch Series 6 and SE, the new iPads, and of course, the surprise release of iOS 14.

Sponsor

• DEVONthink: Manage your documents the smart way on Mac and iOS. Get 10% off with code 9to5mac-2020.

Links

• try! Swift World
• Rambo’s Milkshakr repo
• Diagrams
• Logic controllers
• View models
• John’s Twitter game development diary
• Apple "Time Flies" event video

On this special 100th episode of the show, John and Rambo reflect on their personal milestones since episode one, and play another round of Apple Keynote Poker in preparation for next week’s Apple event.

Links

• Keynote Poker scorecard
• Rambo’s article about creating configurable macOS widgets
• How John typically structures model data in Swift
• Your Calendrical Fallacy Is...
• Apple Watch blood oxygen detection article
• Rambo’s original report on AirTags
• Publish
• AirBuddy

Behind the scenes of building an App Clip, progressive disclosure when designing UIs, Rambo's struggles with App Translocation on macOS, and speculation around what Apple might have in store for us this fall.

Links

• iOS 13.7
• Bloomberg’s report on Apple’s plans for the fall
• Rambo’s article about building an App Clip
• ChibiStudio on TestFlight

A deep dive into syncing systems and what goes into writing code for synchronizing user data using tools like CloudKit, a look under the hood of what AirPower could’ve been, and your regular weekly updates from John and Rambo.

Sponsor

• ALOGIC: Get the 10-in-1 Super Dock 50% off retail on Indiegogo for a limited time. Enter the MacBook Air giveaway.

Links

• The Fibonacci sequence
• Sign up for the AirBuddy 2 beta
• Rambo's Twitter thread about his feedback system
• AirPower prototype teardown
• CloudKit 101
• The WWDC app’s CloudKit implementation
• Paw
• NativeConnect
• Appstat

Analysis of the ongoing battle between Apple and Epic Games from a technical perspective, the benefit of writing cross-platform Swift code, logging and debugging strategies, and how Rambo merged two apps into one.

Sponsor

• iMazing: Get 30% off iMazing, the most popular all-purpose iPhone and iPad manager for Mac and PC.

Links

• The Bundle API
• Fortnite
• Epic’s “FreeFortnite” campaign
• Unreal Engine
• Upgrade #311: Summer of App Store Problems

Combining SwiftUI with other rendering technologies, Rambo’s preparations for the launch of the AirBuddy 2.0 Beta, and lots of thoughts on the recent App Store controversy involving Microsoft’s xCloud game streaming service. Also, custom Swift keywords, yay or nay?

Sponsor

• iMazing: Get 30% off iMazing, the most popular all-purpose iPhone and iPad manager for Mac and PC.

Links

• Imagine Engine
• Metal
• The Core Image kernel API
• Core Animation’s particle effects API
• AirBuddy on Twitter
• Project xCloud
• The Verge’s article on Apple’s response to xCloud
• Google Stadia
• OnLive
• App Store Review Guidelines
• SetApp
• Phil Schiller advances to Apple Fellow
• Codable
• Property wrappers
• Function builders
• Rust macros

What differentiates server-side and client-side development, Tim Cook’s testimony in front of the US Congress, the new iMac, Rambo’s secret new project, and more on John’s not-so-secret use of SwiftUI to build games.

Sponsor

• iMazing: Get 30% off iMazing, the most popular all-purpose iPhone and iPad manager for Mac and PC.

Links

• Imagine Engine
• Rambo makes the Taptic Engine play music
• UIView’s point conversion API
• John’s SwiftUI layout guide
• The Talk Show episode about the recent Congress hearing
• The iMac updates
• Cloudflare Workers

Is FaceID coming to the Mac, what could a Swift version of async/await end up looking like, and what makes SwiftUI a nice fit for game UI development?

Sponsor

• iMazing: Get 30% off iMazing, the most popular all-purpose iPhone and iPad manager for Mac and PC.

Links

• Rendering textured game UIs using SwiftUI
• The resizable modifier for SwiftUI images
• SwiftUI’s blendMode modifier
• macOS Big Sur suggests the TrueDepth camera is coming
• Pull request adding ‘async’ to the Swift type system
• Async/await in JavaScript
• Combine
• Futures and Promises in Swift
• SwiftUI’s ViewBuilder
• Handling non-optional optionals in Swift
• Handling model variants in Swift
• SwiftUI’s Environment API
• UIHostingController
• Swift’s String implementation

Rambo shuts down two of his projects and battles Dark Mode on macOS, John re-evaluates his goals and work priorities, and the two discuss the big Twitter hack, engineering management, and whether Apple has changed their strategy around when to ship new features.

Links

• The Sharecuts archive
• Splash
• John’s SwiftUI game hack

After an accidental deep dive into SwiftUI, John and Rambo discuss the recent issues with Facebook’s iOS SDK and whether Apple should force developers to adopt more platform features. Then, this episode’s actual deep dive, into backend-driven UIs.

Links

• Imagine engine
• Johns game
• Standford CS193P
• Compression framework
• Rambo is quoted by the BBC
• A Moment of Clarity Regarding the Raison d’Etre for the App Store
• Spotify's deprecated Hub framework

After a bit of speculation as to whether or not Apple will ship this year’s iPhone without a charger, John and Rambo go on a deep dive into SwiftUI state management, and discuss various approaches for sharing code between an app and an extension.

Links

• WWDC by Sundell & Friends
• Kuo: Apple will not include earbuds or charger in iPhone 12 box
• A guide to SwiftUI’s state management system

The macOS Big Sur redesign doesn’t mean the end of the world, right? Or does it? John and Rambo discuss the reveal of Apple Silicon, macOS 11, iOS apps coming to the Mac, and much more — all during a recording session stretched out over two days in the middle of a Brazilian lightning storm.

Links

• WWDC by Sundell & Friends
• John’s SwiftUI app prototype
• Swift by Sundell episode with Josh Shaffer and Eliza Block
• “Bring keyboard and mouse gaming to iPad” from WWDC20

On this WWDC20 special, John and Rambo start diving into the main announcements from Apple’s conference, focusing on iOS, App Clips, Widgets, Siri, Maps, watchOS, AirPods and iPadOS.

Sponsor

• MacStadium: Get 50% off the first six months of a Mac mini subscription with code WWDC2020.

Links

• WWDC by Sundell & Friends

John and Gui Rambo share their first impressions of Apple’s WWDC20 opening keynote, as well as the Platforms State of the Union session. This is the WWDC by Sundell & Friends podcast, subscribe to our daily show on the website.

Did Apple’s first ever online keynote live up to our expectations, which of the announcements were the most exciting, and what technologies are we looking forward to dive deeper into during the week? Those are just some of the questions that we’ll discuss on this first episode of the WWDC by Sundell & Friends podcast.

On this special episode of the show, John and Rambo are joined by Ellen Shapiro and Kaya Thomas for the grand WWDC20 Keynote Poker game. Bets, speculations, and discussions around what Apple might release next week at the 2020 edition of WWDC.

Links

• Poker scorecard
• Apollo GraphQL
• We Read Too
• Episode 77
• Kaya’s “Meet the developer” interview with Apple
• Rambo’s WWDC20 wishlist

A deep dive into the iOS background operations model and how it could potentially be improved, rumors about both ARM Macs and a new iMac design being unveiled at WWDC20, and a discussion around designing custom systems for apps. That, and your regular updates from both John and Rambo, on this week’s episode of Stacktrace.

Links

• Watch Time episode with Ish ShaBazz
• ChibiStudio
• WWDC by Sundell
• Bloomberg’s report about ARM Macs being announced at WWDC
• Rumor about a redesigned iMac being announced at WWDC
• How the Australian COVID-19 contact tracing app is reminding its users to open it
• Grand Central Dispatch
  • Apple’s official documentation
  • On Swift by Sundell Basics
• Sharing UserDefaults data within an app group
• URLSessionConfiguration
• Rambo’s dotSwift talk about app architecture

Preparations for WWDC, a look at the first COVID-19 exposure notification apps powered by Apple and Google’s system, and a deep dive into the world of Reactive Programming through frameworks like RxSwift and Combine. Also, will cross-platform technologies like Flutter ever take over native iOS development?

Sponsor

• ZeroSSL: A new, completely free and trusted certificate authority and SSL Platform, aiming to make it easy and extremely affordable to create SSL certificates.Try ZeroSSL today for free.

Links

• CocoaHub
• Italy’s Immuni exposure notification app
• Apple and Google’s exposure notification system
• RxSwift
• Combine
• Build your own Futures and Promises library

What could an iPhone without any ports look like, and is it likely that Apple would ever adopt USB-C for the iPhone? Also, Mac development, using multiple programming languages, sharing utilities between projects, and much more.

Sponsor

• ZeroSSL: A new, completely free and trusted certificate authority and SSL Platform, aiming to make it easy and extremely affordable to create SSL certificates.Try ZeroSSL today for free.

Links

• ASCIIwwdc
• The WWDC Mac app
• Rambo’s macOS-style emoji picker for iPadOS
• John’s first and second “micro podcast”
• “A fully wireless iPhone is more likely than a Smart Connector”
• NSView’s isFlipped property
• Rambo’s event tracking loop implementation
• “Beyond the Checkbox with Catalyst and AppKit”, by Steve Troughton-Smith
• Rambo’s talk from BA: Swiftable
• Identity
• Codextended

This week, John and Rambo go on a deep dive into the responder chain and how UI events are propagated on Apple’s platforms. Also, SwiftUI vs Catalyst, Apple’s mysterious new QR codes for AR, and a visit to the Sundell R&D division.

Sponsors

• Bitrise: iOS Continuous Integration and Delivery for building better applications, faster. Sign up for free and learn more here.
• Clubhouse: The collaborative home for modern software teams.

Links

• Apple’s custom QR codes for AR
• Rambo’s AR article on WWDC by Sundell
• The responder chain
• Using the responder chain for error handling
• Rambo’s dotSwift conference talk about MVC

The recent Facebook SDK crashing incident leads John and Rambo into a deep-dive on third party SDKs and various ways to handle them. Also, new thoughts and details on the rumored AirPods Studio headphones, how writing about a topic can make you re-examine your opinions on it, and the launch of FusionCast.

Sponsor

• Bitrise: iOS Continuous Integration and Delivery for building better applications, faster. Sign up for free and learn more here.

Links

• John’s “Propagating user-facing errors in Swift” article
• FusionCast
• Raphael Lopes on Dribbble
• Bloomberg’s report on AirPods Studio
• 9to5Mac’s report on AirPods Studio
• The big Facebook crash of 2020 and the problem of third-party SDK creep
• Rambo’s Washington Post interview
• Facebook’s iOS SDK
• NSObject’s load method
• Charles Proxy
• MultipeerKit

John automates the deployment of his website, which just celebrated its third birthday (or is it “anniversary”?), Rambo is about to launch a new app, and the two go on a deep dive into the iOS 13.5 beta and Apple + Google’s “Exposure notification” system for tracking the spread of COVID-19.

Sponsor

• Bitrise: iOS Continuous Integration and Delivery for building better applications, faster. Sign up for free and learn more here.

Links

• The Publish DeploymentMethod API
• Apple updates the 13-inch MacBook Pro
• Apple and Google’s COVID-19 tracing system

John and Rambo return to the topic of app architecture, this time to discuss how to build scalable code bases using the MVC design pattern, and also talk about what Apple’s pro-level apps (including Xcode) might look like if ported to the iPad.

Sponsor

• Disco Elysium: An award-winning and groundbreaking role-playing game, now available on Mac. Get 25% off until May 1 on Steam.

Links

• John’s new video about Controllers in MVC
• Hypervisor
• Parker Ortolani’s “Xcode for iPad” concept
• Git’s bisect feature

John writes Javascript encryption code and reviews Apple’s new Magic Keyboard for the iPad Pro, Rambo reveals an exclusive new AirBuddy feature coming in version 2.0, and the two talk about the new iPhone SE, Apple’s upcoming remote accessibility event, and much more.

Links

• Cloudflare workers
• Web Crypto
• Wat
• Publish
• AirBuddy
• Reinstalling macOS using Internet Recovery
• The new iPhone SE
• Apple’s accessibility event invitation
• The iPad Pro Magic Keyboard