Swift - 在 AppDelegate 中添加子视图

Swift - adding Subview in AppDelegate

我对 revealingSplashView 有疑问。我希望每次应用程序启动时都显示它,但它没有显示,因为我必须将它添加为 Subview 但我如何在 AppDelegate 中执行此操作?

我试过了,但没用:

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

let revealingSplashView = RevealingSplashView(iconImage: UIImage(named: "zauberstab")!, iconInitialSize: CGSize(width: 120, height: 120), backgroundColor: .white)

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    print("hi")
    revealingSplashView.startAnimation()
    window?.addSubview(revealingSplashView)
    FirebaseApp.configure()

    return true
}

问题出在事件的顺序上。您添加启动视图。然后根视图控制器出现并获取它的视图并将其添加到 window — 覆盖启动视图。

一种解决方法是让根视图控制器现在获取它的视图,并将初始视图放在那个视图中:

window?.rootViewController?.view.addSubview(revealingSplashView)