The app delegate must implement the window property if it wants to use a main storyboard file

Can someone help me Xcode says The app delegate must implement the window property if it wants to use a main storyboard file This is my

AppDelegate.swift file:



import UIKit


var window: UIWindow?

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate{



func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

// Override point for customization after application launch.

return true

}


// MARK: UISceneSession Lifecycle


@available(iOS 13.0, *)

func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {

// Called when a new scene session is being created.

// Use this method to select a configuration to create the new scene with.

return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)

}


@available(iOS 13.0, *)

func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {

// Called when the user discards a scene session.

// If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.

// Use this method to release any resources that were specific to the discarded scenes, as they will not return.

}



}





My SceneDelegate.swift:





import UIKit


class SceneDelegate: UIResponder, UIWindowSceneDelegate {


var window: UIWindow?



@available(iOS 13.0, *)

@available(iOS 13.0, *)

@available(iOS 13.0, *)

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

// Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.

// If using a storyboard, the `window` property will automatically be initialized and attached to the scene.

// This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).

guard let _ = (scene as? UIWindowScene) else { return }

}


@available(iOS 13.0, *)

func sceneDidDisconnect(_ scene: UIScene) {

// Called as the scene is being released by the system.

// This occurs shortly after the scene enters the background, or when its session is discarded.

// Release any resources associated with this scene that can be re-created the next time the scene connects.

// The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).

}


@available(iOS 13.0, *)

func sceneDidBecomeActive(_ scene: UIScene) {

// Called when the scene has moved from an inactive state to an active state.

// Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.

}


@available(iOS 13.0, *)

func sceneWillResignActive(_ scene: UIScene) {

// Called when the scene will move from an active state to an inactive state.

// This may occur due to temporary interruptions (ex. an incoming phone call).

}


@available(iOS 13.0, *)

func sceneWillEnterForeground(_ scene: UIScene) {

// Called as the scene transitions from the background to the foreground.

// Use this method to undo the changes made on entering the background.

}


@available(iOS 13.0, *)

func sceneDidEnterBackground(_ scene: UIScene) {

// Called as the scene transitions from the foreground to the background.

// Use this method to save data, release shared resources, and store enough scene-specific state information

// to restore the scene back to its current state.

}



}

hi,


instead of defining a global window variable outside of the AppDelegate:


var window: UIWindow?
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate{
  // code
}


perhaps you should be writing this, which implements a window property for the AppDelegate


@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate{
  var window: UIWindow?
  // code
}



this looks more like how a storyboard-based app delegate is set up in order to use the main storyboard (rather than a SwiftUI setup which uses a SceneDelegate for iOS 13).


hope that helps,

DMG

The app delegate must implement the window property if it wants to use a main storyboard file
 
 
Q