what's new on swiftui in iOS 18

In iOS 18, SwiftUI has introduced several new features and improvements. Here are some of the highlights:

1. Graphics Capabilities:

   • New mix modifier on color to blend colors by a given amount.
   • Extended custom shader feature with precompilation to avoid frame drops.

2. Scroll View Enhancements:

   • Fine-grained control over scroll views with onScrollGeometryChange.
   • Ability to detect view visibility changes due to scrolling.
   • More programmatic control over scroll positions and content alignment.

3. Accessibility:

   • Enhanced accessibility labels with additional information without overriding the framework-provided label.
   • New accessibility features like conditional modifier support and app intent-based accessibility actions.

4. Xcode Previews:

   • Dynamic linking architecture for faster iteration between preview and build.
   • Easier setup with the previewable macro to use state directly in previews.

5. Text and Selection Management:

   • Programmatic access to and control of text selection within text editing controls.

6. Swift 6 Language Mode:

   • Compile-time data race safety.
   • Improved APIs to adopt the new language mode.

7. Interoperability:

   • Gesture recognition factored out of UIKit for use in SwiftUI view hierarchy.
   • Animations can be set up on UIKit or AppKit views and driven by SwiftUI.

8. New UI Elements:

   • New tab view syntax in SwiftUI for easier error detection at build time.
   • Custom containers and mesh gradients for more flexible UI design.

For a detailed overview, you can watch the session What’s new in SwiftUI.