iPad 中的 MPMoviePlayerController 全屏怪癖

Question

我想在视图控制器中显示 MPMoviePlayerController 并让用户使用默认控件（例如 YouTube 应用程序）切换全屏。我在一个简单的示例中使用了以下代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    self.player = [[MPMoviePlayerController alloc] init];
    self.player.contentURL = theURL;
    self.player.view.frame = self.viewForMovie.bounds;
    self.player.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self.viewForMovie addSubview:player.view];
    [self.player play];
}

在用户将视频全屏显示、旋转设备并点击屏幕之前，这种方法效果很好。状态栏显示的位置错误，如下图所示。

我正在使用适用于 iPad 的模板标签栏应用程序。我只在 XIB 中添加了上面的 viewDidLoad、视图变量和 UIView 以显示电影播放器​​。

我做错了什么？

Answer 1

是的，我也遇到这个问题。这绝对是 MPMoviePlayerController 本身的一个错误。

我在应用程序中确定的解决方法是在退出全屏模式时自行更正状态栏：

- (void)playerDidExitFullscreen:(NSNotification *)notification {
    MPMoviePlayerController *moviePlayer = (MPMoviePlayerController *) notification.object;

    if (moviePlayer == self.player) {
        UIApplication *app = [UIApplication sharedApplication];
        if (app.statusBarOrientation != self.interfaceOrientation) {
            [app setStatusBarOrientation:self.interfaceOrientation animated:NO];
        }
    }
}

这并不能解决全屏模式下的问题，但它会在之后修复它。

当然需要注意的是，该功能需要添加到通知中：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playerDidExitFullscreen:) name:MPMoviePlayerDidExitFullscreenNotification object:nil];

Answer 2

对于所有受支持的方向，shouldAutorotateToInterfaceOrientation:interfaceOrientation 是否返回 YES？

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

如果您提供更多代码将会有所帮助。

Answer 3

您的 UI 使用界面生成器吗？如果是这样，请确保在视图属性检查器中将视图的方向设置为“横向”。

Answer 4

遇到同样的问题，搞了半天才解决。当 iPad 处于纵向时，每当我使用示例代码（或我在网上找到的任何代码）开始播放视频时，视频和控制栏都会被格式化为纵向，因此遍布屏幕上。

无论如何，以下内容对我有用。

  /* Call the code like below:
        int iLandscape;
        if( newOrientation==UIInterfaceOrientationLandscapeLeft || newOrientation==UIInterfaceOrientationLandscapeRight )
             iLandscape=1;

        [self PlayVideo:iLandscape fullscreen:1]
    */
        //////////////////////////////////////////////////////////////////////////
        - (void)PlayVideo:(int)iLandscape fullscreen:(int)iFullScreen 
        {
            NSString *url = [[NSBundle mainBundle] pathForResource:@"myvideofile" ofType:@"m4v"];

        if( iFullScreen==0 )
        {
            MPMoviePlayerController *player2 = 
                [[MPMoviePlayerController alloc] 
                    initWithContentURL:[NSURL fileURLWithPath:url]];

            [[NSNotificationCenter defaultCenter] 
                addObserver:self
                   selector:@selector(movieFinishedCallback:)
                       name:MPMoviePlayerPlaybackDidFinishNotification
                     object:player2];

            //---play partial screen---
            player2.view.frame = CGRectMake(0, 0, m_iScreenWidth, m_iScreenHeight);
            [self addSubview:player2.view];
            //---play movie---
            [player2 play];
        }   
        else
        {
            MPMoviePlayerViewController *playerViewController = [[MPMoviePlayerViewController alloc] 
                initWithContentURL:[NSURL fileURLWithPath:url]];

            [[NSNotificationCenter defaultCenter] 
                addObserver:self
                   selector:@selector(movieFinishedCallback:)
                       name:MPMoviePlayerPlaybackDidFinishNotification
                     object:[playerViewController moviePlayer]];

            if( iLandscape )
            {
                playerViewController.view.frame = CGRectMake(0, 0, m_iScreenWidth, m_iScreenHeight);
            }
            [self addSubview:playerViewController.view];
            //play movie
            MPMoviePlayerController *player = [playerViewController moviePlayer];
            player.scalingMode=MPMovieScalingModeAspectFit;
            [player play];
        }
    }


    //////////////////////////////////////////////////////////////////////////
    - (void) movieFinishedCallback:(NSNotification*) aNotification 
    {
        MPMoviePlayerController *player = [aNotification object];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:player];    
        [player autorelease];    
        [player.view removeFromSuperview];
    }

Answer 5

找到了。

有同样的问题 - 这就是我所做的。我建议将代码一一添加到您的项目中，以准确了解其工作原理。

首先 - 我把东西设置为纵向模式。

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];

然后我把电影推到状态栏上。注意 - 这假设视频具有 4x3 的宽高比

theVideo = [[MPMoviePlayerController alloc] initWithContentURL: [NSURL fileURLWithPath : path]];
float aspectRatio = (3.0f/4.0f);
float theMovieHeight = [self view].bounds.size.width * aspectRatio;
[[theVideo view] setFrame:(CGRectMake(0, [self view].bounds.size.height - theMovieHeight, [self view].bounds.size.width, theMovieHeight ))]; 

然后，在应用程序启动的地方（在我的项目中，它位于 didFinishLaunchingWithOptions 函数中） - 无论如何，您只需要访问窗口对象。

float aspectRatio = (3.0f/4.0f);
float theMovieHeight = self.window.bounds.size.width * aspectRatio;
float theSpaceAboveTheMovie = self.window.bounds.size.height - theMovieHeight;
float whereTheMovieShouldBeCentered = (self.window.bounds.size.height - theMovieHeight) / 2;

CGAffineTransform theTransform = CGAffineTransformMakeTranslation(0,0);

theTransform = CGAffineTransformScale(theTransform, 1.0f/aspectRatio, 1.0f/aspectRatio);
theTransform = CGAffineTransformTranslate(theTransform, -whereTheMovieShouldBeCentered, 0);
theTransform = CGAffineTransformRotate(theTransform, M_PI / 2);
theTransform = CGAffineTransformTranslate(theTransform, 0, -theSpaceAboveTheMovie);

[self.window setTransform:theTransform];

请记住，仿射变换是以相反的顺序完成的。因此，如果您想查看每个转换正在执行的操作（我建议您应该这样做），请注释掉前三个

这里您应该看到位于页面中心的影片和状态栏

//  theTransform = CGAffineTransformScale(theTransform, 1.0f/aspectRatio, 1.0f/aspectRatio);
//  theTransform = CGAffineTransformTranslate(theTransform, -whereTheMovieShouldBeCentered, 0);
//  theTransform = CGAffineTransformRotate(theTransform, M_PI / 2);
    theTransform = CGAffineTransformTranslate(theTransform, 0, -theSpaceAboveTheMovie);

然后前两个

您应该看到影片和状态栏旋转并且不再居中

//  theTransform = CGAffineTransformScale(theTransform, 1.0f/aspectRatio, 1.0f/aspectRatio);
//  theTransform = CGAffineTransformTranslate(theTransform, -whereTheMovieShouldBeCentered, 0);
    theTransform = CGAffineTransformRotate(theTransform, M_PI / 2);
    theTransform = CGAffineTransformTranslate(theTransform, 0, -theSpaceAboveTheMovie);

在这里您应该看到它旋转并居中

//  theTransform = CGAffineTransformScale(theTransform, 1.0f/aspectRatio, 1.0f/aspectRatio);
    theTransform = CGAffineTransformTranslate(theTransform, -whereTheMovieShouldBeCentered, 0);
    theTransform = CGAffineTransformRotate(theTransform, M_PI / 2);
    theTransform = CGAffineTransformTranslate(theTransform, 0, -theSpaceAboveTheMovie);

并且与它们一起，它被旋转并全屏

您可以下载我的示例代码 这里。

Answer 6

试试这个

 - (void)willEnterFullscreen:(NSNotification*)notification {
     NSLog(@"willEnterFullscreen");

    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight animated:NO];
  }

 - (void)enteredFullscreen:(NSNotification*)notification {
     NSLog(@"enteredFullscreen");
 }

- (void)willExitFullscreen:(NSNotification*)notification {
    NSLog(@"willExitFullscreen");

    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];


}

- (void)exitedFullscreen:(NSNotification*)notification {
    NSLog(@"exitedFullscreen");

    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

Answer 7

[[UIApplication sharedApplication] setStatusBarOrientation:UIDeviceOrientationPortrait animated:NO];

这段代码可能对你有帮助。