Snapp iOS Weekly

Yes! Custom skills - whether per project or global - already go a long way in boosting productivity and enforcing good practices. By “existing systems” do you mean existing skills? If so, most can probably be ported over with some adaptation. If all else fails, your agent can always figure it out 😅

Agentic coding in Xcode Apple has finally released Xcode 26.3, which now supports agentic coding. In this article, I’ll guide you through configuring Xcode 26.3 and utilizing the latest best practices when using agentic…

🤖 𝐴𝑔𝑒𝑛𝑡𝑖𝑐 𝑐𝑜𝑑𝑖𝑛𝑔 𝑖𝑛 𝑋𝑐𝑜𝑑𝑒 by Majid Jabrayilov (@mecid.bsky.social)

Quick starter on Xcode 26.3's new AI capabilities. Learn how to add custom skills to extend your agentic workflow.

#Xcode #AI #iOSDev

swiftwithmajid.com/2026/02/10/a...

isolated(any) and #isolation - Letting Swift Closures Automatically Inherit Isolation While Swift 6.2's Default Actor Isolation simplifies concurrency, the compiler sometimes fails to infer closure execution contexts, leading to unexpected errors. This article explores a practical…

🔒 𝑖𝑠𝑜𝑙𝑎𝑡𝑒𝑑(𝑎𝑛𝑦) 𝑎𝑛𝑑 #𝑖𝑠𝑜𝑙𝑎𝑡𝑖𝑜𝑛 by Xu Yang (@fatbobman.com)

Learn how @𝑖𝑠𝑜𝑙𝑎𝑡𝑒𝑑(𝑎𝑛𝑦) and #𝑖𝑠𝑜𝑙𝑎𝑡𝑖𝑜𝑛 let closures automatically inherit their execution context from callers.

#Swift #Concurrency

fatbobman.com/en/posts/let...

@_exported import VS public import Swift 6 introduced a new feature called "Access level imports". With [SE-0409](https://github.com/swiftlang/swift-evolution/blob/main/proposals/0409-access-level-on-imports.md) you can attach access…

📦 @_𝑒𝑥𝑝𝑜𝑟𝑡𝑒𝑑 𝑖𝑚𝑝𝑜𝑟𝑡 𝑉𝑆 𝑝𝑢𝑏𝑙𝑖𝑐 𝑖𝑚𝑝𝑜𝑟𝑡 by Alexander Weiss

Swift 6 brings six access levels for imports. Compare re-exporting symbols as your own vs declaring public dependencies.

#Swift #Swift6

alexanderweiss.dev/blog/2026-01...

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Huge gratitude to authors:
Alexander Weiss, @fatbobman.com, @mecid.bsky.social, Peter Friese, Giselle Katics, Josh Steele, Kyle Ye.

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📱 Issue #79 is out!

This week's lineup:
📦 @_𝑒𝑥𝑝𝑜𝑟𝑡𝑒𝑑 𝑣𝑠 𝑝𝑢𝑏𝑙𝑖𝑐 𝑖𝑚𝑝𝑜𝑟𝑡
🔒 𝑖𝑠𝑜𝑙𝑎𝑡𝑒𝑑(𝑎𝑛𝑦) & #𝑖𝑠𝑜𝑙𝑎𝑡𝑖𝑜𝑛
🤖 𝐴𝑔𝑒𝑛𝑡𝑖𝑐 𝑐𝑜𝑑𝑖𝑛𝑔 𝑖𝑛 𝑋𝑐𝑜𝑑𝑒
💎 𝑋𝑐𝑜𝑑𝑒 + 𝐺𝑒𝑚𝑖𝑛𝑖 𝐶𝐿𝐼
🎨 𝐵𝑟𝑎𝑛𝑑𝑖𝑛𝑔 𝑤𝑖𝑡ℎ 𝐴𝐼
💾 𝑆𝑤𝑖𝑓𝑡𝐷𝑎𝑡𝑎 𝑄𝑢𝑖𝑐𝑘𝑠𝑡𝑎𝑟𝑡
🐛 𝑁𝑆𝑈𝑠𝑒𝑟𝐴𝑐𝑡𝑖𝑣𝑖𝑡𝑦 𝐷𝑒𝑏𝑢𝑔
🛠️ 𝑋𝑐𝑜𝑑𝑒𝐵𝑢𝑖𝑙𝑑𝑀𝐶𝑃

#Swift #iOSDev

ios-newsletter.snappmobile.io/issues/2026-...

A visual cheat sheet of Combine operators This article provides a visual cheat sheet of common Combine operators, with a diagram for each one to illustrate how values flow through a pipeline.

📊 𝐴 𝑣𝑖𝑠𝑢𝑎𝑙 𝑐ℎ𝑒𝑎𝑡 𝑠ℎ𝑒𝑒𝑡 𝑜𝑓 𝐶𝑜𝑚𝑏𝑖𝑛𝑒 𝑜𝑝𝑒𝑟𝑎𝑡𝑜𝑟𝑠 by Natascha Fadeeva

Need a quick reference for 𝐶𝑜𝑚𝑏𝑖𝑛𝑒 operators? A visual cheat sheet with diagrams shows how values flow through each operator.

#Combine #Swift #Framework #iOSDev

tanaschita.com/combine-oper...

From Pixel Capture to Metadata - Reimagining Screen Recording Architecture on macOS Build a macOS screen recorder with ScreenSage Pro's dev log. Learn to master ScreenCaptureKit, Metal, fix SCK error -3821, and optimize SwiftUI performance with @Observable.

🎥 𝐹𝑟𝑜𝑚 𝑃𝑖𝑥𝑒𝑙 𝐶𝑎𝑝𝑡𝑢𝑟𝑒 𝑡𝑜 𝑀𝑒𝑡𝑎𝑑𝑎𝑡𝑎: 𝑅𝑒𝑖𝑚𝑎𝑔𝑖𝑛𝑖𝑛𝑔 𝑆𝑐𝑟𝑒𝑒𝑛 𝑅𝑒𝑐𝑜𝑟𝑑𝑖𝑛𝑔 𝐴𝑟𝑐ℎ𝑖𝑡𝑒𝑐𝑡𝑢𝑟𝑒 𝑜𝑛 𝑚𝑎𝑐𝑂𝑆 by Xu Yang (@fatbobman.com)

Building a macOS screen recorder exposes surprising pitfalls - from 𝑆𝑐𝑟𝑒𝑒𝑛𝐶𝑎𝑝𝑡𝑢𝑟𝑒𝐾𝑖𝑡 errors to Metal composition. Discover the architecture decisions that make it work.

#macOS

On-demand resources in iOS app On-Demand Resources allow you to ship a smaller initial app download and fetch additional assets like images, sounds, level data, ML models, and more only when a user requires them. This week, we’ll…

📦 𝑂𝑛-𝑑𝑒𝑚𝑎𝑛𝑑 𝑟𝑒𝑠𝑜𝑢𝑟𝑐𝑒𝑠 𝑖𝑛 𝑖𝑂𝑆 𝑎𝑝𝑝 by Majid Jabrayilov (@mecid.bsky.social)

Ever thought about keeping API tokens out of your app binary? On-Demand Resources offer a clever defense-in-depth technique worth exploring.

#iOS #Security #Swift #Framework

swiftwithmajid.com/2026/02/03/o...

From broken to testable SwiftUI navigation: The decoupled approach of MVVM with coordinators SwiftUI provides several tools for managing navigation, and the introduction of NavigationStack and value-destination links improved programmatic navigation. However, in larger applications, vanilla…

🧪 𝐹𝑟𝑜𝑚 𝑏𝑟𝑜𝑘𝑒𝑛 𝑡𝑜 𝑡𝑒𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑛𝑎𝑣𝑖𝑔𝑎𝑡𝑖𝑜𝑛: 𝑇ℎ𝑒 𝑑𝑒𝑐𝑜𝑢𝑝𝑙𝑒𝑑 𝑎𝑝𝑝𝑟𝑜𝑎𝑐ℎ 𝑜𝑓 𝑀𝑉𝑉𝑀 𝑤𝑖𝑡ℎ 𝑐𝑜𝑜𝑟𝑑𝑖𝑛𝑎𝑡𝑜𝑟𝑠 by Matteo Manferdini

Scattered navigation logic breaking your tests? Centralizing routing with coordinators makes navigation testable and scalable.

#SwiftUI #Testing #Architecture #MVVM

Transforming Glass Views with the glassEffectID in SwiftUI – SerialCoder.dev SerialCoder.dev

✨ 𝑇𝑟𝑎𝑛𝑠𝑓𝑜𝑟𝑚𝑖𝑛𝑔 𝐺𝑙𝑎𝑠𝑠 𝑉𝑖𝑒𝑤𝑠 𝑤𝑖𝑡ℎ 𝑡ℎ𝑒 𝑔𝑙𝑎𝑠𝑠𝐸𝑓𝑓𝑒𝑐𝑡𝐼𝐷 𝑀𝑜𝑑𝑖𝑓𝑖𝑒𝑟 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 by Gabriel Theodoropoulos

Want to create smooth morphing transitions between glass-effect views? Master the 𝑔𝑙𝑎𝑠𝑠𝐸𝑓𝑓𝑒𝑐𝑡𝐼𝐷 modifier for seamless visual effects.

#SwiftUI #UI #iOSDev

serialcoder.dev/text-tutoria...

Dark Mode - Wesley de Groot Dark Mode is an important feature that many users appreciate for its aesthetic appeal, and for people with visual impairments. In this blog post, we'll explore how to implement Dark Mode in your iOS…

🌙 𝐷𝑎𝑟𝑘 𝑀𝑜𝑑𝑒 by Wesley De Groot (@0xwdg.bsky.social)

Need to implement Dark Mode in your SwiftUI app? Explore automatic support, custom views with 𝐸𝑛𝑣𝑖𝑟𝑜𝑛𝑚𝑒𝑛𝑡, and forcing specific interface styles.

#SwiftUI #DarkMode #iOSDev #Swift

wesleydegroot.nl/blog/dark-mode

🤖 𝐻𝑜𝑤 𝑡𝑜 𝑈𝑠𝑒 𝐿𝐿𝑀 𝑎𝑠 𝑎 𝐽𝑢𝑑𝑔𝑒 (𝑊𝑖𝑡ℎ𝑜𝑢𝑡 𝐺𝑒𝑡𝑡𝑖𝑛𝑔 𝐵𝑢𝑟𝑛𝑒𝑑) by Manthan Gupta

Can LLMs reliably evaluate other AI models? Discover how to build fair evaluation systems without burning your tokens.

#AI #MachineLearning #LLM #iOSDev

manthanguptaa.in/posts/llm_as...

SwiftUI Agent Skill: Build better views with AI Explore the SwiftUI Agent Skill that transforms view building and refactoring. Improve your code with this open-source solution.

🤖 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝐴𝑔𝑒𝑛𝑡 𝑆𝑘𝑖𝑙𝑙: 𝐵𝑢𝑖𝑙𝑑 𝑏𝑒𝑡𝑡𝑒𝑟 𝑣𝑖𝑒𝑤𝑠 𝑤𝑖𝑡ℎ 𝐴𝐼 by Antoine van der Lee (@avanderlee.com)

Tired of fixing the same SwiftUI mistakes across projects? An open-source agent skill teaches AI to write better views from the start.

#SwiftUI #AI #iOSDev #Swift

www.avanderlee.com/ai-developme...

Thank you for a good content. Always a pleasure to share!

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Authors:
@avanderlee.com, Manthan Gupta, @0xwdg.bsky.social, Gabriel Theodoropoulos, Matteo Manferdini, @mecid.bsky.social, @fatbobman.com, Natascha Fadeeva.

Never miss an issue → subscribe: ios-newsletter.snappmobile.io/subscribe

📬 Issue 78 is out!

Fresh insights
🤖 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝐴𝑔𝑒𝑛𝑡 𝑆𝑘𝑖𝑙𝑙
🤖 𝐻𝑜𝑤 𝑡𝑜 𝑈𝑠𝑒 𝐿𝐿𝑀 𝑎𝑠 𝑎 𝐽𝑢𝑑𝑔𝑒
🌙 𝐷𝑎𝑟𝑘 𝑀𝑜𝑑𝑒
✨ 𝑔𝑙𝑎𝑠𝑠𝐸𝑓𝑓𝑒𝑐𝑡𝐼𝐷 𝑀𝑜𝑑𝑖𝑓𝑖𝑒𝑟 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼
🧪 𝑇𝑒𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑁𝑎𝑣𝑖𝑔𝑎𝑡𝑖𝑜𝑛
📦 𝑂𝑛-𝑑𝑒𝑚𝑎𝑛𝑑 𝑟𝑒𝑠𝑜𝑢𝑟𝑐𝑒𝑠
🎥 𝑆𝑐𝑟𝑒𝑒𝑛 𝑅𝑒𝑐𝑜𝑟𝑑𝑖𝑛𝑔 𝐴𝑟𝑐ℎ𝑖𝑡𝑒𝑐𝑡𝑢𝑟𝑒
📊 𝐶𝑜𝑚𝑏𝑖𝑛𝑒 𝑂𝑝𝑒𝑟𝑎𝑡𝑜𝑟𝑠

#Swift #SwiftUI

ios-newsletter.snappmobile.io/issues/2026-...

Supporting JPEG-XL compression in Apple ProRAW Capture Pinpoint some trouble you may encounter when supporting JPEG-XL

📷 𝑆𝑢𝑝𝑝𝑜𝑟𝑡𝑖𝑛𝑔 𝐽𝑃𝐸𝐺-𝑋𝐿 𝑐𝑜𝑚𝑝𝑟𝑒𝑠𝑠𝑖𝑜𝑛 𝑖𝑛 𝐴𝑝𝑝𝑙𝑒 𝑃𝑟𝑜𝑅𝐴𝑊 𝐶𝑎𝑝𝑡𝑢𝑟𝑒 by Weichao Deng

Want to reduce 48MP ProRAW file sizes without sacrificing quality? Discover how to enable JPEG-XL compression in your camera app and navigate an undocumented 𝐴𝑉𝐹𝑜𝑢𝑛𝑑𝑎𝑡𝑖𝑜𝑛 API.

#AVFoundation #ProRAW #iOSDevelopment

I Spent Way Too Long Getting Blender Animations into Vision Pro So here’s the thing about Apple Vision Pro development that nobody warns you about: getting animated 3D characters into your app is way harder than it should be.

🥽 𝐼 𝑆𝑝𝑒𝑛𝑡 𝑊𝑎𝑦 𝑇𝑜𝑜 𝐿𝑜𝑛𝑔 𝐺𝑒𝑡𝑡𝑖𝑛𝑔 𝐵𝑙𝑒𝑛𝑑𝑒𝑟 𝐴𝑛𝑖𝑚𝑎𝑡𝑖𝑜𝑛𝑠 𝑖𝑛𝑡𝑜 𝑉𝑖𝑠𝑖𝑜𝑛 𝑃𝑟𝑜 by Mike Bundy

Struggling to get Blender animations working in Reality Composer Pro? The specific export sequence that fixes broken skeleton bindings - plus an addon to automate it.

#visionOS #Blender

stepinto.vision/articles/i-s...

⚡ 𝐷𝑒𝑏𝑢𝑔𝑅𝑒𝑝𝑙𝑎𝑐𝑒𝑎𝑏𝑙𝑒𝑉𝑖𝑒𝑤 𝑎𝑛𝑑 𝑆𝑤𝑖𝑓𝑡 6.2'𝑠 𝑀𝑢𝑙𝑡𝑖𝑝𝑙𝑒 𝑇𝑦𝑝𝑒 𝐸𝑟𝑎𝑠𝑒𝑟𝑠 by Kyle Ye (@KyleYe@mastodon.world)

Why are Previews faster on iOS 26? Swift 6.2's multiple type erasers enable 𝐷𝑒𝑏𝑢𝑔𝑅𝑒𝑝𝑙𝑎𝑐𝑒𝑎𝑏𝑙𝑒𝑉𝑖𝑒𝑤 to hot-swap views without rebuilds.

🔄 𝑁𝑜𝑛-𝑆𝑒𝑛𝑑𝑎𝑏𝑙𝑒 𝐹𝑖𝑟𝑠𝑡 𝐷𝑒𝑠𝑖𝑔𝑛 by Matt Massicotte (@massicotte.org)

Should you start with non-sendable types before adding isolation? Explore a simpler approach to Swift Concurrency design.

#Swift #Concurrency #iOSDevelopment

massicotte.org/blog/non-sen...

Copy-on-write teaches you EVERYTHING about Swift Internals 🐮 isKnownUniquelyReferenced through the standard library, compiler, and runtime

🐮 𝐶𝑜𝑝𝑦-𝑜𝑛-𝑤𝑟𝑖𝑡𝑒 𝑡𝑒𝑎𝑐ℎ𝑒𝑠 𝑦𝑜𝑢 𝐸𝑉𝐸𝑅𝑌𝑇𝐻𝐼𝑁𝐺 𝑎𝑏𝑜𝑢𝑡 𝑆𝑤𝑖𝑓𝑡 𝐼𝑛𝑡𝑒𝑟𝑛𝑎𝑙𝑠 by Jacob Bartlett (@jacobstechtavern.com)

Trace 𝑖𝑠𝐾𝑛𝑜𝑤𝑛𝑈𝑛𝑖𝑞𝑢𝑒𝑙𝑦𝑅𝑒𝑓𝑒𝑟𝑒𝑛𝑐𝑒𝑑() from Standard Library through AST, SIL, and LLVM IR to Swift Runtime - how CoW works at every compiler layer.

#Swift #CompilerTheory #iOSDevelopment

Rendering Markdown in SwiftUI Learn how to render Markdown in SwiftUI using Text and AttributedString

📝 𝑅𝑒𝑛𝑑𝑒𝑟𝑖𝑛𝑔 𝑀𝑎𝑟𝑘𝑑𝑜𝑤𝑛 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 by Artem Novichkov

𝑆𝑤𝑖𝑓𝑡𝑈𝐼 supports Markdown out-of-the-box since iOS 15, but can you color text directly without 𝐴𝑡𝑡𝑟𝑖𝑏𝑢𝑡𝑒𝑑𝑆𝑡𝑟𝑖𝑛𝑔? Discover built-in formatting and its surprising limitations.

#SwiftUI #Markdown #iOSDevelopment

artemnovichkov.com/blog/renderi...

Reverse masking in SwiftUI using blend modes → Livsy Code Greetings, traveler! SwiftUI gives us mask(_:), which works well when you want to reveal part of a view. What it does not give us is the inverse version — a way to cut shapes out of a view and let…

🎨 𝑅𝑒𝑣𝑒𝑟𝑠𝑒 𝑚𝑎𝑠𝑘𝑖𝑛𝑔 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑢𝑠𝑖𝑛𝑔 𝑏𝑙𝑒𝑛𝑑 𝑚𝑜𝑑𝑒𝑠 by Artem Mirzabekian

Need to cut transparent holes through surfaces in 𝑆𝑤𝑖𝑓𝑡𝑈𝐼? Implement reverse masking using blend modes and 𝑐𝑜𝑚𝑝𝑜𝑠𝑖𝑡𝑖𝑛𝑔𝐺𝑟𝑜𝑢𝑝().

#SwiftUI #iOSDevelopment

livsycode.com/swiftui/reve...

AI App Development: What I Learned in One Month Dive into my journey of AI App Development, where I rapidly transformed an idea into a thriving app using powerful AI tools.

🤖 𝐴𝐼 𝐴𝑝𝑝 𝐷𝑒𝑣𝑒𝑙𝑜𝑝𝑚𝑒𝑛𝑡: 𝑊ℎ𝑎𝑡 𝐼 𝐿𝑒𝑎𝑟𝑛𝑒𝑑 𝑖𝑛 𝑂𝑛𝑒 𝑀𝑜𝑛𝑡ℎ by Antoine van der Lee (@avanderlee.com)

Building with AI agents moves fast - but what are the hidden costs? Five critical lessons from the first month of serious AI-assisted development.

#AI #Swift #iOSDevelopment

Snapp iOS Weekly | Subscription I agree to receive your newsletters and accept the data privacy statement.

Authors: @avanderlee.com, Artem Mirzabekian, Artem Novichkov, Kyle Ye, @jacobstechtavern.com, @massicotte.org, Mike Bundy, Weichao Deng.

Never miss an issue → subscribe: ios-newsletter.snappmobile.io/subscribe

iOS Newsletter Issue 77 Hi folks!

Fresh satisfying redesign 🎨

Snapp Mobile iOS Newsletter → 𝗦𝗻𝗮𝗽𝗽 𝗶𝗢𝗦 𝗪𝗲𝗲𝗸𝗹𝘆

New name. New look. Same great articles.

𝗜𝘀𝘀𝘂𝗲 #𝟳𝟳 is live 🚀

This week:
→ AI App Dev: What I Learned in One Month
→ Copy-on-write & Swift Internals
→ JPEG-XL in Apple ProRAW
+ 5 more

Modularity as an Architectural Choice → Livsy Code Greetings, traveler! Modularity is an architectural approach where a codebase is split into well-defined, independent units with explicit responsibilities and boundaries. Each module exposes a clear…

🧩 𝑀𝑜𝑑𝑢𝑙𝑎𝑟𝑖𝑡𝑦 𝑎𝑠 𝑎𝑛 𝐴𝑟𝑐ℎ𝑖𝑡𝑒𝑐𝑡𝑢𝑟𝑎𝑙 𝐶ℎ𝑜𝑖𝑐𝑒 by Artem Mirzabekian

Modularity promises independence but often delivers circular dependencies and inflated interfaces. Splitting code without architectural discipline creates more problems than it solves.

#Architecture #iOSDev

livsycode.com/best-practic...

Why VIPER and MVVM in SwiftUI are actually the same pattern: A lesson in architectural thinking Architectural design patterns like VIPER might seem radically different from common ones like MVVM. However, upon deeper inspection, it turns out that these patterns share the same constitutive…

🏗️ 𝑊ℎ𝑦 𝑉𝐼𝑃𝐸𝑅 𝑎𝑛𝑑 𝑀𝑉𝑉𝑀 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑎𝑟𝑒 𝑎𝑐𝑡𝑢𝑎𝑙𝑙𝑦 𝑡ℎ𝑒 𝑠𝑎𝑚𝑒 by Matteo Manferdini

Mapping VIPER components directly onto MVVM equivalents - Views to Content Views, Interactors to ViewModels, Presenters to Root Views - and why VIPER's boilerplate isn't worth it in SwiftUI.

#SwiftUI #Architecture #iOSDev

A Deep Dive into SwiftData migrations – Donny Wals SwiftData migrations are one of those things that feel optional… right until you ship an update and real users upgrade with real data on disk. In this post we’ll dig into: By the end of this post you…

💾 𝐴 𝐷𝑒𝑒𝑝 𝐷𝑖𝑣𝑒 𝑖𝑛𝑡𝑜 𝑆𝑤𝑖𝑓𝑡𝐷𝑎𝑡𝑎 𝑚𝑖𝑔𝑟𝑎𝑡𝑖𝑜𝑛𝑠 by Donny Wals (@donnywals.bsky.social)

Which schema changes need manual migrations versus automatic handling? Exploring boundaries between automatic reshaping and bridge versions.

#SwiftData #Swift #iOSDev

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