转自:http://blog.csdn.net/xueer8835/article/details/22286629
#import <MediaPlayer/MediaPlayer.h> MediaPlayer.framework。 MPMoviePlayerViewController： 打开网络视频： -(void)openmovie { MPMoviePlayerViewController *movie = [[MPMoviePlayerViewControlleralloc]initWithContentURL:[NSURLURLWithString:@"视频网络地址"]]; [movie.moviePlayer prepareToPlay]; [self presentMoviePlayerViewControllerAnimated:movie]; [movie.moviePlayersetControlStyle:MPMovieControlStyleFullscreen]; [movie.viewsetBackgroundColor:[UIColorclearColor]]; [movie.view setFrame:self.view.bounds]; [[NSNotificationCenterdefaultCenter]addObserver:self selector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:movie.moviePlayer]; } -(void)movieFinishedCallback:(NSNotification*)notify{ // 视频播放完或者在presentMoviePlayerViewControllerAnimated下的Done按钮被点击响应的通知。 MPMoviePlayerController* theMovie = [notifyobject]; [[NSNotificationCenterdefaultCenter]removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:theMovie]; [selfdismissMoviePlayerViewControllerAnimated]; } 打开本地视频： -(void)openmovie { NSString *url = [[NSBundlemainBundle]pathForResource:@"IMG_0322"ofType:@"mp4"]; MPMoviePlayerViewController *playerViewController = [[MPMoviePlayerViewControlleralloc]initWithContentURL:[NSURLfileURLWithPath:url]]; [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(movieFinishedCallback:) name:MPMoviePlayerPlaybackDidFinishNotification object:[playerViewControllermoviePlayer]]; [self.view addSubview:playerViewController.view]; MPMoviePlayerController *player = [playerViewControllermoviePlayer]; [playerplay]; } - (void) movieFinishedCallback:(NSNotification*) aNotification { MPMoviePlayerController *player = [aNotificationobject]; [[NSNotificationCenterdefaultCenter]removeObserver:selfname:MPMoviePlayerPlaybackDidFinishNotificationobject:player]; [playerstop]; [player.viewremoveFromSuperview]; }
避免MPMoviePlayerViewController播放完毕后自动dismiss，进入后台自动dismiss
MPMoviePlayerViewController已经实现了一些通知的监听并对MPMoviePlayerController实现了一些控制，比如：
1. 监听UIApplicationDidEnterBackgroundNotification通知，调用[movieplayer stop],播放器停止。
2. 监听MPMoviePlayerPlaybackDidFinishNotification（调用stop方法或视频播放结束时发送通知）通知，调用dismiss方法移除自身。
需求1：app中一个课程包含若干个章节，所以每次播放完一个章节后要求直接加载播放下一个课程。
遇到问题：由于MPMoviePlayerViewController监听了MPMoviePlayerPlaybackDidFinishNotification通知，当一个视频播放完毕，它会在监听方法中 调用dismissMoviePlayerViewControllerAnimated方法，播放器视图就直接移除了。
解决方法：
// self为MPMoviePlayerViewController的一个实例对象。 [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:nil];
需求2: app进入后台时播放器暂停，回到应用时继续播放
遇到问题：由于MPMoviePlayerViewController监听了UIApplicationDidEnterBackgroundNotification通知，当进入后台时，调用stop方法，随后接 收到MPMoviePlayerPlaybackDidFinishNotification通知，调用dismiss方法移除自身视图。
解决方法：移除MPMoviePlayerViewController对UIApplicationDidEnterBackgroundNotification和MPMoviePlayerPlaybackDidFinishNotification 通知的监听，并实现自己的监听方法
// UIApplicationDidEnterBackgroundNotification通知- (void)appEnterBackground:(NSNotification*)notice { // 进入后台时记录当前播放时间 overlay_flags.playTimeWhenEnterBackground = _player.currentPlaybackTime; [_player pause]; } // UIApplicationWillEnterForegroundNotification通知- (void)appEnterForeground:(NSNotification*)notice{ // 设置播放速率为正常速度，设置当前播放时间为进入后台时的时间 [_player setCurrentPlaybackRate:1.0]; [_player setCurrentPlaybackTime:overlay_flags.playTimeWhenEnterBackground];}
