Why I can't see Launch(Splash) Screen when change Root View in swift5?

Question

the problem I have is to remove the root arrow on the story board and set up the root view in the AppDelegate file to dynamically change the RootView.

There is no problem moving the root view, but the existing splashScreen(Launch Screen) is not visible. Why can't you see it? How can I see the splashScreen(Launch Screen) and go to the root view?

Main.Storyboard

Login.Storyboard,

Launch.Storyboard

Move Root Screen in AppDelegate.swift

var window: UIWindow?

    func switchStartUI() {
        let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let viewController = mainStoryboard.instantiateViewController(withIdentifier: "StartViewController")
        self.window?.rootViewController = viewController
    }

    func switchToMainUI() {
        let mainStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let viewController = mainStoryboard.instantiateViewController(withIdentifier: "NavigationController")
        self.window?.rootViewController = viewController
    }

    func switchLoginUI(_ pushtype : String) {
        let loginStoryboard = UIStoryboard(name: "Login", bundle: nil)
        let viewController = loginStoryboard.instantiateViewController(withIdentifier: "MainLoginController") as! MainLoginController
        viewController.pushType = pushtype
        self.window?.rootViewController = viewController
    }

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        self.window = UIWindow(frame: UIScreen.main.bounds)
      if let screenData : String = LocalStorage.get("ScreenView") as? String {
            switch (screenData) {
            case "success":
                switchToMainUI()
            case "success1":
                switchLoginUI("")
            case "success2":
                switchLoginUI("")
            default:
                switchStartUI()
            }
        } else {
            switchStartUI()
        }

        self.window?.makeKeyAndVisible()

        return true
    }

I want to see the splash screen and move on to the root view

There is already an image on my splash screen. It worked normally. But I can't see the splash screen after dynamically modifying the root view. I'm the same

I can only see the black screen. when remove two function

self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.makeKeyAndVisible()

To me, the white screen appears and then I go to the root view page.

I don't know why I can't see the splash screen.

How can I solve this problem??

Thanks in advance

Answer 1

This was a simple solution. 'Launch.Added root arrow to 'Storyboard'.