首次啟動應用程序后如何使入職場景消失 Xcode 11 iOS 13

Question

我對此很陌生，遇到了問題。 我的目標是制作一個歡迎您使用該應用程序的引導屏幕。 我希望它在第一次啟動應用程序后消失。 我已按照本教程進行操作。 我沒有將代碼放在AppDelegate中，而是將代碼放在SceneDelegate中：

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

到目前為止，這是我的代碼：

進口 UIKit

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


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

        let launchedBefore = UserDefaults.standard.bool(forKey: "hasLaunched")
            self.window? = UIWindow(frame: UIScreen.main.bounds)
            let launchStoryboard = UIStoryboard(name: "Main", bundle: nil)
            let mainStoryboard = UIStoryboard(name: "actual", bundle: nil)

            var vc: UIViewController

            if launchedBefore
            {

                vc = mainStoryboard.instantiateInitialViewController()!

            }
            else
            {
                vc = launchStoryboard.instantiateViewController(identifier: "firststoryboard")
            }
            UserDefaults.standard.set(true, forKey: "hasLaunched")

        self.window?.rootViewController = vc
        self.window?.makeKeyAndVisible()

        // 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 }



    }


    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).
    }

    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.
    }

    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).
    }

    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.
    }

    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.
    }

}

現在我沒有收到任何錯誤，但是當我啟動該應用程序時，屏幕是黑色的。 有誰知道我做錯了什么？

Answer 1

我不知道您是否找到了答案，但我只是問了一個基本相同的問題並得到了回答： How to make Onboarding work with Scene Delegate in iOS13?