碰到一个问题，在AppDelegate中三句话：

window = UIWindow(frame: UIScreen.main.bounds)

window.rootViewController = FaceViewController()

window.makeKeyAndVisible()

这可以撇开storyboard，但没用，刷新了我的认识！原因原来在这，小问题，记录下。

有三个didFinishLauching：

    //混淆视听的，已改名
    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
        
        print("Good!!")
        
		return true
	}
    //正宫
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
        
        window = UIWindow(frame: UIScreen.main.bounds)
        window?.rootViewController = FaceViewController()
        window?.makeKeyAndVisible()
        
        return true
    }
    //已废用
    func applicationDidFinishLaunching(_ application: UIApplication) {
        print("okkk1")
    }