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How to make a class observable starting from iOS 17?

sobes.tech AI

Answer from AI

Starting from iOS 17, to make a class observable, you can use the new Observable protocol from Swift Concurrency. Instead of the familiar ObservableObject with @Published, now the class should conform to the Observable protocol and use an asynchronous change stream.

Example:

import SwiftUI
import Observation

@Observable
class MyModel {
    var value: Int = 0
}

// Usage in SwiftUI
struct ContentView: View {
    @StateObject private var model = MyModel()

    var body: some View {
        Text("Value: \(model.value)")
    }
}

The key here is the @Observable annotation before the class, which automatically generates the necessary logic for change tracking. This simplifies the creation of observable models and their integration with SwiftUI.

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