What is new on SwiftUI for IOS 18?

In iOS 18, SwiftUI introduces several new features and improvements:

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. New TabView Syntax:

   • Easier to catch common errors at build time.
   • New syntax to declare a tab struct with title, image, and content view.
   • Programmatic selection of tabs.

4. Swift 6 Language Mode:

   • Compile-time data race safety.
   • Views in SwiftUI are now marked with the main actor annotation.

5. Custom Containers and Mesh Gradients:

   • New APIs for custom containers.
   • Beautiful mesh gradients for more visually appealing designs.

6. Improved Interoperability:

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

7. Xcode Previews:

   • New dynamic linking architecture for smoother workflow.
   • Previewable macro to use dynamic properties like state directly in previews.

For more details, you can check out the session "What’s new in SwiftUI" (00:00:07).

Relevant Sessions

1. What’s new in SwiftUI
2. Platforms State of the Union
3. Elevate your tab and sidebar experience in iPadOS