What changes happened in regards to @State
Asked on 08/03/2024
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Changes regarding @State in SwiftUI were discussed in the sessions "SwiftUI essentials" and "What’s new in SwiftUI" at WWDC 2024. Here are the key points:
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State Management:
@Stateis used to create a new internal source of data for a view. SwiftUI manages the storage and provides it back for the view to read and write (SwiftUI essentials).- When a view property is marked with
@State, SwiftUI maintains the value of this state behind the scenes. Changes to the state trigger updates to the view (SwiftUI essentials).
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Animations:
- State changes can be wrapped with animations to apply view updates with a default or custom animation (SwiftUI essentials).
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Main Actor Isolation:
- Views in SwiftUI are now implicitly isolated to the main actor by default, meaning all types conforming to
Vieware marked with the@MainActorannotation. This change ensures that UI updates are performed on the main thread, improving performance and safety (What’s new in SwiftUI).
- Views in SwiftUI are now implicitly isolated to the main actor by default, meaning all types conforming to
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Swift 6 Language Mode:
- The new Swift 6 language mode introduces compile-time data race safety, which is beneficial for state management in SwiftUI. This mode is opt-in, allowing developers to adopt it when ready (What’s new in SwiftUI).
These updates enhance the way state is managed and utilized in SwiftUI, providing better performance, safety, and ease of use.
SwiftUI essentials
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