iOS13.0 AppDelegate中没有window闪退

删除 SceneDelegate ，把window 放在 AppDelegate 中。

class AppDelegate: UIResponder, UIApplicationDelegate {

 var window: UIWindow?
 
 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
 // Override point for customization after application launch.
 let viewController = UIViewController()
 
 window = UIWindow(frame: UIScreen.main.bounds)
 window?.rootViewController = viewController
 window?.makeKeyAndVisible()
 
 return true
 }
}

你好，应该是SDK 里面有方法调用 AppDelegate.window，但实际上的工程里面是有SceneDelegate，window是在SceneDelegate文件里面。所有会报错，在AppDelegate里面加一个window属性就好了，也不用给window赋值。