breaking ui changes

Breaking UI Changes in iOS 18

iOS 18 introduces several significant updates and changes to UIKit that may impact existing applications. Here are some of the key changes:

1. List Environment Trait:

   • New constructors for UIBackgroundConfiguration (list cell, list header, and list footer) automatically update their appearance based on the list environment trait. This simplifies code but may require updates to existing configurations.
   • What’s new in UIKit (10:48)

2. UIUpdateLink:

   • A new API similar to CADisplayLink but with more features, such as automatic view tracking and low latency mode for drawing applications. This can improve performance and battery efficiency but may require changes to how periodic UI updates are implemented.
   • What’s new in UIKit (11:50)

3. Tab and Sidebar Updates:

   • The tab bar and sidebar have been refreshed with a new compact look and combined experience. This includes new APIs (UITab and UITabGroup) to describe app structure, which may necessitate changes to existing tab bar implementations.
   • What’s new in UIKit (01:09)

4. Zoom Transition:

   • A new zoom transition for navigation and presentations that is continuously interactive. This may require updates to existing transition implementations to take advantage of the new interactive capabilities.
   • What’s new in UIKit (02:08)

5. SF Symbols Animations:

   • Expanded with new symbol animations and three new animation presets, ensuring a consistent appearance for toolbar icons, navigation bars, and other UI elements.
   • What’s new in UIKit (12:55)

6. Transition Handling:

   • UIKit now supports transitions that can begin at any time, requiring code to handle transitions more robustly. This includes ensuring that push and pop transitions are handled correctly regardless of whether a transition is already in progress.
   • Enhance your UI animations and transitions (07:02)

Relevant Sessions

• What’s new in UIKit
• Enhance your UI animations and transitions

These changes aim to streamline the user interface and improve performance but may require developers to update their existing codebases to fully leverage the new features and ensure compatibility.