Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and how to make them stable: nilcoalescing.com/blog/Unstabl... #iOSDev #SwiftUI

The hidden cost of unstable SwiftUI environment defaults

Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and ...

nilcoalescing.com

As iOS apps become fully resizable, our layouts have to handle many more combinations of width and height. My new post explores how we can use SwiftUI’s onGeometryChange() to apply custom layout rules without updating state for every measurement: nilcoalescing.com/blog/Respond... #iOSDev #SwiftUI

Responding to geometry changes in SwiftUI

Adapt a SwiftUI interface to its available space using the onGeometryChange() modifier, while limiting state updates to the geometry changes that matter.

nilcoalescing.com

iOS 27 gives AsyncImage more control over remote image loading with URLRequest support for custom headers, cache policies, and timeouts, plus the ability to provide a custom URLSession across a SwiftUI view hierarchy: nilcoalescing.com/blog/AsyncIm... #iOSDev #SwiftUI

AsyncImage improvements in iOS 27

iOS 27 gives AsyncImage more control over remote image loading with URLRequest support for custom headers, cache policies, and timeouts, plus the ability to provide a custom URLSession across a SwiftU...

nilcoalescing.com

SwiftUI now includes CrossFadeNavigationTransition, a built-in cross-fade navigation transition, and AnyNavigationTransition, a type-erased wrapper that allows transitions to be selected dynamically at runtime: nilcoalescing.com/blog/SwiftUI... #iOSDev #SwiftUI

Navigation transition updates in SwiftUI on iOS 27

SwiftUI now includes CrossFadeNavigationTransition, a built-in cross-fade navigation transition, and AnyNavigationTransition, a type-erased wrapper that allows transitions to be selected dynamically a...

nilcoalescing.com

iOS 27 extends support for swipe actions beyond List to any SwiftUI scroll container using the new swipeActionsContainer() modifier: nilcoalescing.com/blog/CustomS... #iOSDev #SwiftUI

Custom scroll layouts with swipe actions in SwiftUI on iOS 27

iOS 27 extends support for swipe actions beyond List to any scroll container using the new swipeActionsContainer() modifier.

nilcoalescing.com

📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟱 𝗶𝘀 𝗼𝘂𝘁! Featuring: ⚡ 𝑆𝑤𝑖𝑓𝑡 𝑁𝑒𝑤𝑠 🌐 𝑊ℎ𝑎𝑡 𝐻𝑎𝑝𝑝𝑒𝑛𝑠 🧩 𝐿𝑖𝑓𝑒𝑐𝑦𝑐𝑙𝑒 🎨 𝐴𝑑𝑎𝑝𝑡𝑖𝑣𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 📱 𝑇𝑟𝑎𝑛𝑠𝑖𝑡𝑖𝑜𝑛𝑠 🚀 𝐶𝑜𝑛𝑡𝑒𝑛𝑡𝐵𝑢𝑖𝑙𝑑𝑒𝑟 📊 𝐵𝑦𝑝𝑎𝑠𝑠 🛠️ 𝑂𝑏𝑠𝑒𝑟𝑣𝑎𝑏𝑙𝑒𝑃𝑒𝑟𝑠𝑖𝑠𝑡𝑒𝑛𝑐𝑦 #Swift #iOSDev ios-newsletter.snappmobile.io/issues/2026-...

Explore the different variants of the onChange() modifier in SwiftUI, including how to access old and new values, trigger the action on initial render, and run asynchronous code in the action closure: nilcoalescing.com/blog/Overvie... #iOSDev #SwiftUI

Overview of the onChange() modifier in SwiftUI

Explore the different variants of the onChange() modifier in SwiftUI, including how to access old and new values, trigger the action on initial render, and run asynchronous code in the action closure.

nilcoalescing.com

I’ve been exploring phaseAnimator() for multi-step animations in SwiftUI. It lets us define a sequence of view states and control the transition into each one. I wrote up how repeating and triggered variants work: nilcoalescing.com/blog/PhaseAn... #iOSDev #SwiftUI

Creating multi-step animations with PhaseAnimator in SwiftUI

Build repeating and event-driven animations in SwiftUI with PhaseAnimator, using phase values and per-phase transitions to control each sequence.

nilcoalescing.com

Build a stretchy image header in SwiftUI using the visualEffect() modifier, scaling the image on pull-down without tracking scroll offset or modifying its frame: nilcoalescing.com/blog/Stretch... #iOSDev #SwiftUI

Stretchy header in SwiftUI with visualEffect()

Build a stretchy image header in SwiftUI using the visualEffect() modifier, scaling the image on pull-down without tracking scroll offset or modifying its frame.

nilcoalescing.com

Have you already explored the new SwiftUI toolbar APIs in iOS 27? If not, this article by @natpanferova.bsky.social will help you… nilcoalescing.com/blog/Adaptiv...

📱 𝐴𝑙𝑖𝑔𝑛𝑚𝑒𝑛𝑡 𝑔𝑢𝑖𝑑𝑒𝑠 𝑖𝑛 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 by Natalia Panferova (@natpanferova.bsky.social) Alignment guides are one of SwiftUI’s best “stop fighting the layout system” tools, and yes, most of us still reach for offsets too quickly. #iOSDev #SwiftUI nilcoalescing.com/blog/Alignme...

The Those Who Swift newsletter has launched a new Devs for Devs section, and I had the pleasure of writing the first article 😊 I shared some practical things to check when preparing an existing app for iOS 27, from resizable layouts to Xcode 27 changes: thosewhoswift.substack.com/p/devs-for-d...

Devs for Devs: Preparing Your Apps for iOS 27

From world-class developers, straight to you.

thosewhoswift.substack.com

Control which SwiftUI toolbar actions stay visible, move commands into overflow, pin an important item and configure navigation bar minimization with the new iOS 27 APIs: nilcoalescing.com/blog/Adaptiv... #iOSDev #SwiftUI

Adaptive SwiftUI toolbars in iOS 27

Control which SwiftUI toolbar actions stay visible, move commands into overflow, pin an important item and configure navigation bar minimization with the new iOS 27 APIs.

nilcoalescing.com

SwiftLee Weekly Issue 336 was sent to 31,189 subscribers with content from @fatbobman.bsky.social, @natpanferova.bsky.social, @rocketsim.app, Alexander Weiss, Bruno Rocha swiftlee-weekly.com/issues/336/

The Those Who Swift newsletter has launched a new Devs for Devs section, and I had the pleasure of writing the first article 😊 I shared some practical things to check when preparing an existing app for iOS 27, from resizable layouts to Xcode 27 changes: thosewhoswift.substack.com/p/devs-for-d...

Devs for Devs: Preparing Your Apps for iOS 27

From world-class developers, straight to you.

thosewhoswift.substack.com

Learn how alignment guides position views in SwiftUI, how to override a built-in guide, and how to define a custom alignment for views in nested containers: nilcoalescing.com/blog/Alignme... #iOSDev #SwiftUI

Alignment guides in SwiftUI

Learn how alignment guides position views in SwiftUI, how to override a built-in guide, and how to define a custom alignment for views in nested containers.

nilcoalescing.com

Review the full range of animation timing options available in SwiftUI, including easing curves, spring animations, the CustomAnimation protocol, and animation modifiers: nilcoalescing.com/blog/Animati... #iOSDev #SwiftUI

SwiftUI animation timing

Review the full range of animation timing options available in SwiftUI, including easing curves, spring animations, the CustomAnimation protocol, and animation modifiers.

nilcoalescing.com

📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟰 𝗶𝘀 𝗼𝘂𝘁! Featuring: ⚡ 𝐸𝑣𝑒𝑛 𝐶𝑙𝑜𝑠𝑒𝑟 📊 𝑆𝑤𝑖𝑓𝑡 🎨 𝑀𝑎𝑘𝑖𝑛𝑔 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 📱 𝐴𝑙𝑖𝑔𝑛𝑚𝑒𝑛𝑡 𝑔𝑢𝑖𝑑𝑒𝑠 🛠️ 𝑇𝑟𝑎𝑐𝑘𝑖𝑛𝑔 𝑣𝑎𝑙𝑢𝑒 🧩 𝐿𝑖𝑞𝑢𝑖𝑑 𝐺𝑙𝑎𝑠𝑠 🚀 𝑀𝑎𝑠𝑡𝑒𝑟𝑖𝑛𝑔 𝑆𝑡𝑜𝑟𝑒𝐾𝑖𝑡 🔍 .𝑁𝐸𝑇, 𝑆𝑤𝑖𝑓𝑡, #Swift #iOSDev ios-newsletter.snappmobile.io/issues/2026-...

SwiftUI introduced a range of new toolbar customization APIs in iOS 27. They give us more control over how toolbars adapt as apps become resizable and appear in more contexts. I explored all the new additions, with examples showing how each one works: nilcoalescing.com/blog/Adaptiv... #iOSDev

Adaptive SwiftUI toolbars in iOS 27

Control which SwiftUI toolbar actions stay visible, move commands into overflow, pin an important item and configure navigation bar minimization with the new iOS 27 APIs.

nilcoalescing.com

Master programmatic scroll control in SwiftUI using defaultScrollAnchor(_:), scrollPosition(_:anchor:), and ScrollPosition to configure, drive, and read scroll position in your apps: nilcoalescing.com/blog/ModernS... #iOSDev #SwiftUI

Modern SwiftUI APIs for programmatic scrolling

Master programmatic scroll control in SwiftUI using defaultScrollAnchor(_:), scrollPosition(_:anchor:), and ScrollPosition to configure, drive, and read scroll position in your apps.

nilcoalescing.com

In iOS 26, SwiftUI introduced a new close button role for dismissing informational views, automatically showing a standard close icon without needing a custom label: nilcoalescing.com/blog/AddAClo...

Add a Close button to SwiftUI modals on iOS 26

In iOS 26, SwiftUI introduces a new close button role for dismissing informational views, automatically showing a standard close icon without needing a custom label.

nilcoalescing.com

Build SwiftUI views that update periodically or continuously, without relying on explicit state changes, to create dynamic interfaces and visual effects: nilcoalescing.com/blog/Timelin... #iOSDev #SwiftUI

Refreshing and animating views using TimelineView in SwiftUI

Build SwiftUI views that update periodically or continuously, without relying on explicit state changes, to create dynamic interfaces and visual effects.

nilcoalescing.com

Use the AttributedString API to build a reusable Text initializer in SwiftUI that applies a distinct font to the unit component of a formatted measurement: nilcoalescing.com/blog/Styling... #iOSDev #SwiftUI

Styling measurement unit fonts in SwiftUI

Use the AttributedString API to build a reusable Text initializer that applies a distinct font to the unit component of a formatted measurement.

nilcoalescing.com

Alignment guides are a powerful but often underused part of SwiftUI's layout system. They let us describe relationships between views using meaningful points in their content, without frame measurements or fixed offsets. I wrote a post explaining them in detail: nilcoalescing.com/blog/Alignme...

Alignment guides in SwiftUI

Learn how alignment guides position views in SwiftUI, how to override a built-in guide, and how to define a custom alignment for views in nested containers.

nilcoalescing.com

SwiftUI's @State changes from a property wrapper to a macro in Xcode 27, gaining lazy evaluation of the initial value and fixing unnecessary @Observable model initialization on view recreation: nilcoalescing.com/blog/Initial... #iOSDev #SwiftUI

Initializing @Observable classes with the @State macro in Xcode 27

SwiftUI's @State changes from a property wrapper to a macro in Xcode 27, gaining lazy evaluation of the initial value and fixing unnecessary @Observable model initialization on view recreation.

nilcoalescing.com

🎨 𝑇ℎ𝑒 ℎ𝑖𝑑𝑑𝑒𝑛 𝑐𝑜𝑠𝑡 𝑜𝑓 𝑢𝑛𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑒𝑛𝑣𝑖𝑟𝑜𝑛𝑚𝑒𝑛𝑡 𝑑𝑒𝑓𝑎𝑢𝑙𝑡𝑠 by Natalia Panferova (@natpanferova.bsky.social) A tiny SwiftUI default value can accidentally become a little invalidation machine, quietly re-rendering more than it should. #iOSDev #SwiftUI #Performance nilcoalescing.com/blog/Unstabl...

The hidden cost of unstable SwiftUI environment defaults

Learn why Xcode 27 shows a warning when an @Entry declaration creates a new class instance for every fallback access, how unstable environment defaults can cause unnecessary SwiftUI view updates, and…

nilcoalescing.com

Reorder items within and between custom SwiftUI containers, and build selection-aware multi-item drag and drop interactions with the new APIs in iOS 27: nilcoalescing.com/blog/NewSwif... #iOSDev #SwiftUI

New SwiftUI APIs for reordering and drag and drop on iOS 27

Reorder items within and between custom SwiftUI containers, and build selection-aware multi-item drag and drop interactions with the new APIs in iOS 27.

nilcoalescing.com

📢 𝗜𝘀𝘀𝘂𝗲 𝟭𝟬𝟯 𝗶𝘀 𝗼𝘂𝘁! Featuring: 🔶 𝐴𝑑𝑣𝑎𝑛𝑐𝑒𝑑 𝑆𝑤𝑖𝑓𝑡 📊 𝐵𝑢𝑖𝑙𝑑 𝐴𝑔𝑒𝑛𝑡𝑖𝑐 𝑆𝑤𝑖𝑓𝑡 𝐴𝑝𝑝𝑠 𝐷𝑦𝑛𝑎𝑚𝑖𝑐 𝑃𝑟𝑜𝑓𝑖𝑙𝑒𝑠 📱 𝐹𝑟𝑒𝑒 𝑢𝑝 𝑋𝑐𝑜𝑑𝑒 𝑑𝑖𝑠𝑘 𝑠𝑝𝑎𝑐𝑒 𝑠𝑎𝑓𝑒𝑙𝑦 𝐴𝐼 𝐴𝑔𝑒𝑛𝑡 🎨 𝐻𝑖𝑑𝑑𝑒𝑛 𝑐𝑜𝑠𝑡 𝑢𝑛𝑠𝑡𝑎𝑏𝑙𝑒 𝑆𝑤𝑖𝑓𝑡𝑈𝐼 𝑒𝑛𝑣 𝑑𝑒𝑓𝑎𝑢𝑙𝑡𝑠 🚀 𝑆𝑒𝑚𝑎𝑛𝑡𝑖𝑐 𝐴𝑐𝑐𝑒𝑠𝑠𝑖𝑏𝑖𝑙𝑖𝑡𝑦 💡 𝐴𝑛𝑎𝑡𝑜𝑚𝑦 𝑅𝑒𝑢𝑠𝑎𝑏𝑙𝑒 𝑉𝑖𝑒𝑤 🛠️ 𝑆𝑤𝑖𝑓𝑡𝑆𝑡𝑎𝑠ℎ 🧠 𝑆𝑡𝑎𝑟𝑙𝑖𝑛𝑔 #Swift #iOSDev

iOS Newsletter Issue 103

Hi folks!

ios-newsletter.snappmobile.io

The July issue of the Nil Coalescing newsletter is out! It includes our trip to the /dev/world on tour conference, The SwiftUI Way book update, and a catalog of our recent Swift and SwiftUI blog posts. You can read it online: nilcoalescing.com/newsletter/2...

Nil Coalescing - Nil Coalescing Newsletter – July 2026

We've been putting this year's WWDC announcements into practice and preparing our apps for iOS 27 after a busy start to July at /dev/world on tour in Sydney. I've also released a substantial update to...

nilcoalescing.com

SwiftLee Weekly Issue 334 was sent to 31,214 subscribers with content from @natpanferova.bsky.social, @rocketsim.app, Anton Gubarenko, Jacob Rakidzich swiftlee-weekly.com/issues/334/