在 iPad 上播放介绍影片

Question

我正在尝试播放介绍电影（如启动画面）。它曾经在 sdk 3.0 上运行良好，但现在我在 iPad 上运行。它没有运行电影，而是在视图出现之前显示黑屏。 这是我的代码

(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
NSString *moviePath = [[NSBundle mainBundle] pathForResource:@"intro" ofType:@"m4v" inDirectory:nil];
NSURL *movieURL = [[NSURL fileURLWithPath:moviePath] retain];
MPMoviePlayerController *moviePlayer=[[MPMoviePlayerController alloc] initWithContentURL:movieURL];
moviePlayer.fullscreen=YES;
moviePlayer.view.frame = CGRectMake(0, 0,1024,768);
[moviePlayer setShouldAutoplay:YES];
[moviePlayer setControlStyle:MPMovieControlStyleNone];
[moviePlayer setRepeatMode:MPMovieRepeatModeNone];

[moviePlayer prepareToPlay];
[moviePlayer play];

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(moviePlaybackDidFinish:) 
                                             name:MPMoviePlayerPlaybackDidFinishNotification 
                                           object:moviePlayer]; 
return YES;
}

，这是我的 moviePlaybackDidFinish

- (void) moviePlaybackDidFinish:(NSNotification*)notification
{

MPMoviePlayerController *theMovie = [notification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
                                                name:MPMoviePlayerPlaybackDidFinishNotification
                                              object:theMovie];
theMovie.initialPlaybackTime = -1;
[theMovie pause]; 

[theMovie stop];
[theMovie release];
[window addSubview:viewController.view];
[window makeKeyAndVisible];


 }

我不知道我在这里缺少什么？
感谢您的帮助....
更新我刚刚发现它播放声音但没有视频......这很明显吗？请帮忙

Answer 1

当您在 MPMoviePlayerViewController 上使用 MPMoviePlayerController 时，我认为您需要在调用 play 之前将播放器的视图添加到视图层次结构中，根据文档：

[player.view setFrame: myView.bounds];  // player's frame must match parent's
[myView addSubview: player.view]; //add the player' view

这可能解释了为什么您听到音频但看不到任何东西，很确定您也需要先设置应用程序窗口（[window makeKeyAndVisible]; 等）