啓動一個APP
self.window = UIWindow.init()
self.window?.frame = UIScreen.main.bounds
self.window?.rootViewController = DemoViewController()
self.window?.makeKeyAndVisible()
啓動一個APP
self.window = UIWindow.init()
self.window?.frame = UIScreen.main.bounds
self.window?.rootViewController = DemoViewController()
self.window?.makeKeyAndVisible()