John builds a cross-platform UI framework in Rust, and Rambo uses the macOS virtualization system to create a virtual iPhone. Links Fixing SwiftPM SSH fingerprint issues in Xcode Raylib wgpu SDL3 “How Clay's UI Layout Algorithm Works” by Nic Barker Swift’s result builders Rust macros VirtualBuddy “Create macOS or Linux virtual machines” from WWDC22 GameNative for Android WINE Rambo’s virtual iPhone...
Using Android as an iOS user, and the state of Swift Package Manager, including how it could become a more full-featured orchestration tool for Xcode projects. Links How to contact us AYN Thor VCMI for running Heroes of Might and Magic 3 on Android Cocoon launcher NPM Cargo Swift Package Index Tuist Private Cloud Compute source code...
Stacktrace is back (again)! But this time, we’re here to stay, at least for the time being, with a new monthly schedule. On this first episode of the 2026 season, John and Rambo discuss how they’re using AI agents when working on different projects, and how to approach learning new programming languages in 2026. Links ProgrammingLanguages subreddit Rust TypeScript Zig Odin SDL Shadertoy...
Stacktrace is back! John and Rambo check their hype levels for WWDC24, and discuss how AI might fit into Apple’s plans for this year’s releases. Also, Xcode wishes, and the challenges of building distributed systems. Links Core ML Rabbit R1 Nvidia DLSS Zed text editor GPT-4 Vision...
John and Rambo reflect on what they’ve been learning and how they’ve been aiming to improve as developers during 2023. Also, tips for getting better at debugging, deploying generative AI within existing apps, and are view models really such a good fit for SwiftUI views? Links ChibiStudio OpenAI’s APIs
Reactions to Apple’s “Scary fast” event, Rambo’s review of the iPhone 15 Pro Max, and under the hood of CleanupBuddy. Links Behind the scenes of Apple’s “Scary fast” event Carrot Weather CleanupBuddy CGEventTapCreate Halide...
Will this year’s iPhones switch to USB-C instead of Lightning, what could an Apple Watch Ultra-style action button be used for on a phone, and will Apple give us another look at the Vision Pro at their upcoming “Wanderlust” event? Links Pillow NSSpain Pragma Conference Rambo’s “Fast and Fluid” conference talk...
Rambo’s custom implementation of macOS desktop widgets and how they relate to Apple’s new built-in system feature, why the experience of using SwiftUI depends so much on the environment it’s being used in, and a mini-review of the ASUS ROG Ally. Links App Intents Building interactive widgets SwiftData NSScreencast Episode number 192: “Sundell Silicon” SteamDeck Proton WWDC video about Apple’s Game porting toolkit ASUS ROG Ally...
John and Rambo start diving into the new announcements from WWDC23 — including the Apple Vision Pro and visionOS, the new Apple Silicon-powered Mac Pro, as well as many of the updates to Apple’s various operating systems. Links NSView’s clipsToBounds property UIViewController’s viewIsAppearing method The Talk Show Live From WWDC 2023 Game porting toolkit SwiftUI’s new Shader API MKBHD’s “Apple’s Forbidden Words” video Prompt...
With the start of WWDC23 just around the corner, John and Rambo share their predictions, hopes, and dreams as to what Apple might introduce during this year’s edition of the conference. It’s Keynote Poker time! Links Steve Troughton-Smith’s xrOS binary submission Distributed actors in Swift John on Mastodon Rambo on Mastodon...
Reducing UI flickering, designing in-app purchase and signup flows, and how adding delays can interestingly make a UI feel more smooth and stable. Sponsor Essential Developer : Join the iOS Architect Crash Course to accelerate your journey towards becoming a senior developer. It’s 100% free and held entirely online. Sign up today !...
Integrating AI-powered features into an iOS app, using high refresh rate monitors with a Mac, the advantages of simple abstractions, and how the M1 and M2 Max compare in terms of Xcode work. Sponsor NordVPN : Get an exclusive discount on NordVPN’s two-year plan, including four bonus months, by going to nordvpn.com/stacktrace . Try it risk-free now with a 30-day money-back guarantee! Links Viticci’s S-GPT shortcut ChibiStudio Carrot Weather The Turing test The OpenAI API David Smith’s post about ...
John and Rambo celebrate the 5-year anniversary of the show by looking back at how their work and the technology they use have changed since the beginning of the show. Also, how might things change during the next 5 years, specifically when it comes to machine learning, AR, and the openness of Apple’s platforms? Sponsor Essential Developer : Join the iOS Architect Crash Course to accelerate your journey towards becoming a senior developer. It’s 100% free and held entirely online. Sign up today !...
How game controllers communicate with a Mac, handling asynchronous data and actions in SwiftUI, and various ways to use view models within a code base. Sponsor NordVPN : Get an exclusive discount on NordVPN’s excellent VPN service, by going to nordvpn.com/stacktrace . They even have a 30-day money-back guarantee! Links Rambo’s Mastodon post about adding game controller support to AirBuddy DualSenseM John’s “Advanced SwiftUI” workshop Observing the content offset of a SwiftUI ScrollView Building ...
Thoughts on the most recent Mac Pro rumors, building custom layouts for SwiftUI views in a backward-compatible manner, and the mechanics of making a UI interaction feel responsive and fluid. Sponsor Essential Developer : Join the iOS Architect Crash Course to accelerate your journey towards becoming a senior developer. It’s 100% free and held entirely online. Sign up today ! Links John on Mastodon Rambo on Mastodon Mark Gurman’s Power On newsletter UICollectionViewFlowLayout SwiftUI’s new Layout...
Building computers, running A/B tests as an indie developer, using UIKit as a layout tool for SwiftUI views, and deciding whether to use Core Data or a more simple on-disk data storage solution. Links CollectionConcurrencyKit Under the Radar episode about optimizing paywalls Rambo’s article about using CloudKit for feature flags Cloudflare’s Workers Analytics Engine Grafana Rambo’s “horrible SwiftUI hack” Switching between SwiftUI’s HStack and VStack “How to Build a Gaming PC in 2022” by Austin ...
Building custom collection view layouts, introducing new features into a legacy code base, and managing patch releases while also working on a major new version of an app at the same time. Links Building modern collection views UICollectionViewLayout The SwiftUI layout system SwiftUI’s LazyVGrid...
John’s got the new AirPods Pro, Rambo’s got the iPhone 14 Pro, so the two share their initial impressions of using these new devices and how features like Dynamic Island and Adaptive Transparency work in day-to-day use. Links Rambo’s 48 MP photos iMazing (disclaimer: former sponsor)
John and Rambo discuss three of the key announcements that Apple made during their “Far Out” event — the Apple Watch Ultra, the new AirPods Pro, and the iPhone 14 Pro. Since this episode was recorded, Apple have now published the documentation for ActivityKit, which lets us build Live Activities that integrate with the Dynamic Island. You can find that documentation here .
With Apple’s upcoming “Far Out” event just around the corner, John and Rambo share their predictions as to what new devices, services and features that might be announced. It’s Apple Keynote Poker time! Links Rambo’s recent appearance on Swift by Sundell
John gains a new “job title”, Rambo starts working on an iOS version of AirBuddy, and the two discuss how come the Apple developer community tends to be so focused on UI frameworks. Links Core Bluetooth August Smart Lock Pro Distributed actors SwiftUI and UIKit interoperability Rambo’s cross-platform UI/NSViewRepresentable solution...
John and Rambo share their initial impressions of some of the new APIs that were announced at WWDC22, and talk about managing releases, learning when and how to apply generics, and the launch of the Gigahertz podcast network. Links Swift by Sundell episode with Natalia Panferova Swift Charts Type erasure in Swift (before Swift 5.7) John’s article about Swift 5.7’s new generics features Swift by Sundell episode with Ben Cohen Avoiding SwiftUI’s AnyView VirtualBuddy Gigahertz Publish Rambo’s Publi...
John and Rambo discuss Apple’s WWDC22 keynote, and share their first impressions of the new features and APIs that were announced. Links Swift by Sundell episode with Ben Cohen The WWDC22 keynote The Talk Show Live From WWDC 2022 iA Writer Camo...
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: ask@stacktracepodcast.fm 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...
