我想只在我的iOS应用程序的所有视图控制器中支持垂直方向.但是,我在我的一个视图控制器中嵌入了一个YouTube视频,当选择该视频占据整个屏幕时,我希望用户能够水平定位他/她的手机,以便视频扩展为全屏.
编辑：我尝试使用Autorotate in iOS 6 has strange behaviour中的以下代码：
- (NSUInteger) application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
return self.fullScreenVideoIsPlaying ?
UIInterfaceOrientationMaskAllButUpsideDown :
UIInterfaceOrientationMaskPortrait;
}
在我的视图控制器中显示UIWebView / YouTube框架,我在viewDidLoad中有这个代码：
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(windowNowVisible:)
name:UIWindowDidBecomeVisibleNotification
object:self.view.window
];
- (void)windowNowVisible:(NSNotification *)notification
{
AppDelegate* appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
appDelegate.fullScreenVideoIsPlaying = !(appDelegate.fullScreenVideoIsPlaying);
}
然而,当用户在全屏YouTube视频上按下完成时,如果他/她仍然水平地具有电话,则呈现视图控制器也保持水平(我希望当前视图控制器是肖像).这是fullSreenVideoIsPlaying变量的竞赛,它没有足够快地更新,因此我的呈现视图控制器是纵向的.
任何有关如何实现这一目标的反馈将不胜感激.
谢谢！
解决方法
通过将我在StackOverflow上找到的一些解决方案组合在一起来找出解决方案.
而不是使用此通知
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(windowNowVisible:)
name:UIWindowDidBecomeVisibleNotification
object:self.view.window
];
我使用以下通知
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(youTubeStarted:) name:@"UIMoviePlayerControllerDidEnterFullscreenNotification" object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(youTubeFinished:) name:@"UIMoviePlayerControllerWillExitFullscreenNotification" object:nil];
与实现
-(void) youTubeStarted:(NSNotification*) notif {
AppDelegate* appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
appDelegate.fullScreenVideoIsPlaying = YES;
}
-(void) youTubeFinished:(NSNotification*) notif {
AppDelegate* appDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
appDelegate.fullScreenVideoIsPlaying = NO;
}
在我的AppDelegate中,我有
- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
NSUInteger orientations = UIInterfaceOrientationMaskPortrait;
if (self.fullScreenVideoIsPlaying) {
return UIInterfaceOrientationMaskAllButUpsideDown;
}
else {
if(self.window.rootViewController){
UIViewController *presentedViewController = [[(UINavigationController *)self.window.rootViewController viewControllers] lastObject];
orientations = [presentedViewController supportedInterfaceOrientations];
}
return orientations;
}
在我看来,控制器,我有
-(BOOL) shouldAutorotate {
return NO;
}
-(NSUInteger)supportedInterfaceOrientations{
return UIInterfaceOrientationMaskPortrait;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
return UIInterfaceOrientationPortrait;
}
