Question

喂，

我有一个简单的应用程序，它包含带有两个UIViewControllers的UITabBarController。两个UIViewControllers都只是纵向（不允许旋转）。一个UIViewController的UIView确实包含MPMoviePlayerController的视图，允许在该视图中播放视频，并可通过控件（MPMovieControlStyleEmbedded）使其全屏显示。代码很简单，看起来像......

__moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"MOVIE_URL"]];
__moviePlayer.controlStyle = MPMovieControlStyleEmbedded;
__moviePlayer.view.frame = CGRectMake( 10, 10, 300, 200 );
__moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
__moviePlayer.shouldAutoplay = NO;
[__moviePlayer prepareToPlay];  
[self.view addSubview:__moviePlayer.view];

...这确实很有效，除非用户切换到全屏播放，我希望允许旋转以允许横向播放。旋转不起作用，因为UITabBarController不允许它（以及两个UIViewControllers）。

所以，我尝试了两种方法，但它们都没有按预期工作。

1）Subclassed UITabBarController

我添加了属性BOOL __allowRotation，如果设置为YES，我会在UITabBarController的shouldAutorotateToInterfaceOrientation方法中返回YES。

我正在侦听MPMoviePlayerDidEnterFullscreenNotification和MPMoviePlayerWillExitFullscreenNotification通知，将此属性设置为YES和NO。

它确实有效，但问题是，当用户以横向结束视频播放时，基础视图不会旋转回纵向。旋转回纵向的唯一方法是使用私有API，这不是没有。

2）视图/图层转换

我也尝试过侦听MPMoviePlayerDidEnterFullscreenNotification和MPMoviePlayerWillExitFullscreenNotification通知。

当我收到MPMoviePlayerDidEnterFullscreenNotification时，我正在启动UIDevice方向通知以获取设备方向。我正在尝试根据当前的设备方向转换MPMoviePlayerController的视图层，但它有点免疫，因为它什么都不做。我可以为转换属性分配任何内容，但它什么都不做。

没有什么不完全正确。当我在旋转期间应用变换时，当我从全屏切换回嵌入式视频播放时，我可以看到此变换的效果。

3）分开UIWindow

我还没有对此进行测试，但我发现某个地方MPMoviePlayerController为全屏播放创建单独的UIWindow，应该可以通过[[UIApplication sharedApplication] windows]访问。这解释了为什么在全屏播放期间不应用转换。

但是我非常不喜欢这个解决方案，因为UIWindow无法识别，我不想使用像objectAtIndex：1这样的魔术常量，或者将转换应用到除主要部分之外的所有UIWindows等。

除了可以修改底层实现并且它将停止工作的事实。

问题

所以，问题是，当底层UIView（即UIView的UIViewController）禁止旋转并仅允许纵向时，如何允许MPMoviePlayerController全屏播放仅旋转？

Answer 1

我的情况非常相似。我的应用程序仅限肖像。但我需要以任何方向显示全屏视频，然后在用户退出全屏模式后返回纵向方向。

Split方法对我不起作用，因为我想让用户全屏观看并嵌入视频，并在模式之间切换，不会失去播放位置，也不会有任何暂停。< / p>

我发现了这个解决方法：

首先，我有一个根UINavigationController子类，它接收有关旋转的所有消息。

我禁止在此控制器中旋转：

- (BOOL) shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)toInterfaceOrientation {
    return (UIInterfaceOrientationPortrait == toInterfaceOrientation);
}

我凌驾于

- (id) initWithRootViewController:(UIViewController *)rootViewController; method.

添加对设备方向修改的支持：

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(receivedRotate:) name: UIDeviceOrientationDidChangeNotification object: nil];

现在我有一个处理程序receivedRotate： - 尽管没有自动旋转到除肖像之外的任何方向，它捕获所有设备旋转：

- (void) receivedRotate:(NSNotification*) notify {
    if(isVideoFullscreen) {
        UIDeviceOrientation toInterfaceOrientation = [[UIDevice currentDevice] orientation];
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.4];
        [UIView setAnimationCurve:2];

        if(toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft){
            self.view.transform = CGAffineTransformMakeRotation(-M_PI_2);
            [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft];
            self.view.bounds = CGRectMake(0, 0, 1024, 768);
        } else if(toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
            self.view.transform = CGAffineTransformMakeRotation(M_PI_2);
            [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight]; 
            self.view.bounds = CGRectMake(0, 0, 1024, 768);            
        } else if(toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
            self.view.transform = CGAffineTransformMakeRotation(M_PI);
            [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortraitUpsideDown];
            self.view.bounds = CGRectMake(0, 0, 768, 1024);
        } else if(toInterfaceOrientation == UIInterfaceOrientationPortrait) {
            self.view.transform = CGAffineTransformMakeRotation(0);
            [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];
            self.view.bounds = CGRectMake(0, 0, 768, 1024);
        }

        [UIView commitAnimations];
    }

}

我只是检查设备的旋转，并相应地旋转我的视图。

然后 - 当视频全屏时，根控制器如何知道？只需将另外两个消息处理程序添加到init：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterFullscreen:) name:MPMoviePlayerWillEnterFullscreenNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willExitFullscreen:) name:MPMoviePlayerWillExitFullscreenNotification object:nil];

处理程序本身：

- (void) willEnterFullscreen: (NSNotification *) notify {
    isVideoFullscreen = YES;
}

- (void) willExitFullscreen: (NSNotification *) notify {
    self.view.transform = CGAffineTransformMakeRotation(0);
    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];
    self.view.bounds = CGRectMake(0, 0, 768, 1024);    
    isVideoFullscreen = NO;
}

退出全屏时 - 我们恢复纵向方向。所以，这对我有用，希望它会帮助别人。

Answer 2

您可以尝试以模态方式呈现新的UIViewController（使用shouldAutorotate YES），并在发送MPMoviePlayerWillEnterFullscreenNotification时将__moviePlayer.view添加到此控制器中。当moviePlayer退出全屏时，反之亦然。

Answer 3

在app delegate中注册MPMoviePlayerWillExitFullscreenNotification和MPMoviePlayerWillEnterFullscreenNotification并使用实例变量处理方向。


-(void)moviePlayerFullScreen:(NSNotification *)notification
{
    if ([notification.name isEqualToString:@"MPMoviePlayerWillEnterFullscreenNotification"]) {

        self.supportedOrientation=UIInterfaceOrientationMaskAll;

    }
    else if ([notification.name isEqualToString:@"MPMoviePlayerWillExitFullscreenNotification"])
    {
        self.supportedOrientation=UIInterfaceOrientationMaskPortrait;

    }
 }
 - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window  {
    return self.supportedOrientation;
}

Answer 4

MPMoviePlayerViewController有自己的功能来模拟显示视频：

NSURL *videoURL = [NSURL fileURLWithPath:video.path];
moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:videoURL];

//Calls for movie playback once video is finished
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlayBackDidFinish:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:moviePlayer];
playerView = [[MPMoviePlayerViewController alloc]init];
[moviePlayer setControlStyle:MPMovieControlStyleFullscreen];
[playerView setView:moviePlayer.view];

[moviePlayer.view setFrame: self.view.bounds];  
[self presentMoviePlayerViewControllerAnimated:playerView];

[moviePlayer play];
NSLog(@"playing video view");

Answer 5

大家好我遇到同样的问题我解决了 -

这是我的完整代码......

您需要先在appdelegate中进行更改：

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
if ([[[NowPlaying sharedManager] playerViewController] allowRotation])//Place your condition here
{
    return UIInterfaceOrientationMaskAll;
}
return UIInterfaceOrientationMaskPortrait;
}

注册全屏控制通知：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerWillEnterFullscreenNotification:)
                                             name:MPMoviePlayerWillEnterFullscreenNotification
                                           object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerWillExitFullscreenNotification:)
                                             name:MPMoviePlayerWillExitFullscreenNotification
                                           object:nil];

然后在播放器控制器中添加代码行：

- (void)moviePlayerWillEnterFullscreenNotification:(NSNotification *)notification
{
dispatch_async(dispatch_get_main_queue(), ^
               {
                   self.allowRotation = YES;
               });
}



- (void)moviePlayerWillExitFullscreenNotification:(NSNotification *)notification
{
self.allowRotation = NO;
[self.moviePlayerController setControlStyle:MPMovieControlStyleNone];

dispatch_async(dispatch_get_main_queue(), ^
               {

                   //Managing GUI in pause condition
                       if (self.currentContent.contentType == TypeVideo && self.moviePlayerController.playbackState == MPMoviePlaybackStatePaused)
                   {
                       [self.moviePlayerController pause];
                       if (self.playButton.selected)
                           self.playButton.selected = NO;
                   }
                   self.view.transform = CGAffineTransformMakeRotation(0);
                   [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait];
                   self.view.bounds = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height);
               });
}

此代码在iOS6和iOS7中经过测试正常运行。感谢

如果有任何问题，请告诉我.....

MPMoviewPlayerController全屏播放旋转，底层UIViewController仅限纵向模式（不允许旋转）

5 个答案: