gistfile1.txt

// All code runs on MainActor
@MainActor
func updateUI(with text: String) {
    label.text = text
}

// properties and functions implicitly marked @MainActor
@MainActor
class ViewModel: ObservableObject {
    // ...
}

// Use MainActor in async contexts
Task { @MainActor in
    let data = await getData() // await can run off main actor
    self.data = data // returns to main actor
}

// safely jump from async context to main actor
await MainActor.run {
    // ... 
}