what are the latest changes in swiftui

Here are the latest changes in SwiftUI as presented at WWDC 2024:

1. Graphics Capabilities: SwiftUI now includes a new mix modifier on colors, allowing you to blend colors by a specified amount. Additionally, custom shaders can be precompiled to avoid frame drops caused by lazy shader compilation.

2. Scroll View Enhancements: There are new APIs for more granular control over scroll views. You can react to changes in content, offsets, and content size with onScrollGeometryChange. You can also detect when a view's visibility changes due to scrolling, enabling experiences like auto-playing videos.

3. Swift 6 Language Mode: SwiftUI has improved its APIs to facilitate the adoption of the new Swift 6 language mode, which includes compile-time data race safety. Views in SwiftUI are now marked with the main actor annotation, meaning they are implicitly isolated to the main actor by default.

4. Interoperability Improvements: Significant improvements have been made to the integration of gestures and animations between SwiftUI and UIKit/AppKit. You can now use any built-in or custom UI gesture recognizer in your SwiftUI view hierarchy, and animations can be set up on UIKit or AppKit views and driven with SwiftUI.

5. Accessibility Enhancements: SwiftUI now allows adding additional accessibility information to controls without overriding the framework-provided label. There are also new accessibility features like conditional modifier support and app intent-based accessibility actions.

6. Xcode Previews: A new dynamic linking architecture in Xcode previews allows switching between a preview and build without needing to rebuild the project, increasing iteration speed. You can also use state directly in previews using the @Previewable macro.

For more detailed information, you can refer to the session What’s new in SwiftUI (16:18) which covers scrolling enhancements and other updates.