Deprecate @UIApplicationMain and @NSApplicationMain

Paul Hudson      @twostraws

SE-0383 formally deprecates the @UIApplicationMain and @NSApplicationMain attributes, encouraging folks to switch across to the general-purpose @main attribute that was introduced back in Swift 5.3.

Adopting this change is trivial. You should be able to change this code:

import SwiftUI 

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    // your code here
}

To this:

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
    // your code here        
}

Or if you're using SwiftUI, just this:

@main
struct SandboxApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

Other changes in Swift 5.10…

• Data races are now clearly diagnosed
• Allow Protocols to be Nested in Non-Generic Contexts
• Refined actor initialization and deinitialization

Download all Swift 5.10 changes as a playground Link to Swift 5.10 changes

Browse changes in all Swift versions