Question 130433 in Xcode Question posted in
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Unable to connect WKExtensionDelegate in Xcode 14 watch app

In the Apple developer docs chapter "There and Back Again" the watch app’s App is written like this:

@main
struct MyWatchApp: App {
    
    @WKExtensionDelegateAdaptor(ExtensionDelegate.self) var extensionDelegate
    
    @SceneBuilder var body: some Scene {
        WindowGroup {
            NavigationView {
                ContentView()
            }
        }
    }
}

Unfortunately I get a purple runtime warning on my var declaration that says

@WKExtensionDelegateAdaptor should only be used within an extension based process

There must be something in Xcode that explicitly defines the App structure as "extension-based" but I can’t find it!

Edit: More clarification… I am trying to handle the special method that gets called after you run the HealthKit method startWatchApp(with:completion:)

The special method for watch extensions is func handle(_ workoutConfiguration: HKWorkoutConfiguration)
I cannot seem to find a way to link this function on the new App structure for watch apps.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    Ok, I found it. The solution is to simply replace WKExtensionDelegate with the new WKApplicationDelegate!


  2. 0

    You can try this solution, it is simple and universal.

    import WatchKit

class ExtensionDelegate: NSObject, WKExtensionDelegate {
    
    static var current: ExtensionDelegate? {
       return (WKExtension.shared().delegate as? ExtensionDelegate)
    }
...
}

    Then access this current instance like below, because it is Singleton, you can access it in the entire project scope.

    ExtensionDelegate.current?.dosomething()
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