我有一个UIView当设备处于肖像/景观模式时，该动画会出现/消失。我这样做：overridefuncviewDidLoad(){super.viewDidLoad()NotificationCenter.default.addObserver(self,selector:#selector(deviceOrientationChanged),name:Notification.Name.UIDeviceOrientationDidChange,object:nil)}funcdeviceOrientationChanged(){switchUIDevice.current.orientati