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 au...
Mar 09, 2022•1 hr 9 min
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-c...
Mar 06, 2022•1 hr 19 min
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...
Mar 02, 2022•55 min
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 Compo...
Feb 23, 2022•55 min
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 J...
Feb 16, 2022•1 hr 15 min
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 for...
Feb 09, 2022•1 hr 3 min
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” — P...
Feb 02, 2022•1 hr 25 min
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...
Jan 26, 2022•1 hr 1 min
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...
Jan 19, 2022•59 min
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...
Dec 31, 2021•1 hr 26 min
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...
Dec 22, 2021•1 hr 1 min
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...
Dec 15, 2021•51 min
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...
Dec 08, 2021•58 min
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 fr...
Dec 01, 2021•1 hr 25 min
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 Ne...
Nov 24, 2021•1 hr 14 min
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...
Nov 17, 2021•1 hr 15 min
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...
Nov 10, 2021•1 hr 19 min
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...
Nov 03, 2021•1 hr 38 min
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: R...
Oct 27, 2021•1 hr 24 min
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 acces...
Oct 20, 2021•1 hr 34 min
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 ...
Oct 13, 2021•1 hr 7 min
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...
Oct 06, 2021•1 hr 17 min
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 ultr...
Sep 29, 2021•1 hr 23 min
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...
Sep 22, 2021•1 hr 16 min
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...
Sep 15, 2021•1 hr 5 min
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...
Sep 08, 2021•1 hr 4 min
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 l...
Sep 01, 2021•1 hr 13 min
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 accessibility...
Aug 25, 2021•1 hr 7 min
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...
Aug 18, 2021•55 min
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 p...
Aug 11, 2021•1 hr 5 min
