State management in SwiftUI

In the session titled "SwiftUI essentials" at WWDC 2024, state management in SwiftUI is discussed in detail. SwiftUI provides several tools for managing state, including @State and @Binding.

• State: This is used to create a new internal source of data for a view. When you mark a view property with @State, SwiftUI manages the storage and provides it back for the view to read and write. This allows the view to react to changes in the state and update the UI accordingly.

• Binding: A binding creates a two-way reference to the state of another view. This is useful when you want to share state between views, allowing them to stay in sync. For example, if you have a container view and a child view, you can pass a binding from the container to the child, ensuring that both views reflect the same state.

The session also highlights how SwiftUI automatically updates the UI when the state changes, eliminating the need for boilerplate code and reducing update bugs. SwiftUI's declarative nature means that views are descriptions of the UI's current state, and SwiftUI handles the updates efficiently behind the scenes.

For more details, you can refer to the session SwiftUI essentials (10:41).