轉自:http://blog.csdn.net/xueer8835/article/details/22286629

#import <MediaPlayer/MediaPlayer.h>
MediaPlayer.framework。

MPMoviePlayerViewController：
開啟網路視訊：
-(void)openmovie
{
    MPMoviePlayerViewController *movie = [[MPMoviePlayerViewControlleralloc]initWithContentURL:[NSURLURLWithString:@"視訊網路地址"]];
    
    [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{
    
    // 視訊播放完或者在presentMoviePlayerViewControllerAnimated下的Done按鈕被點選響應的通知。
    
    MPMoviePlayerController* theMovie = [notifyobject];
    
    [[NSNotificationCenterdefaultCenter]removeObserver:self
     
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
     
                                                  object:theMovie];
    
    [selfdismissMoviePlayerViewControllerAnimated];
    
}
開啟本地視訊：
-(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];
   
}
 

MPMoviePlayerViewController已經實現了一些通知的監聽並對MPMoviePlayerController實現了一些控制，比如：

1. 監聽UIApplicationDidEnterBackgroundNotification通知，呼叫[movieplayer stop],播放器停止。

2. 監聽MPMoviePlayerPlaybackDidFinishNotification（呼叫stop方法或視訊播放結束時傳送通知）通知，呼叫dismiss方法移除自身。

需求1：app中一個課程包含若干個章節，所以每次播放完一個章節後要求直接載入播放下一個課程。

遇到問題：由於MPMoviePlayerViewController監聽了MPMoviePlayerPlaybackDidFinishNotification通知，當一個視訊播放完畢，它會在監聽方法中　　　　　　　呼叫dismissMoviePlayerViewControllerAnimated方法，播放器檢視就直接移除了。

解決方法：

// self為MPMoviePlayerViewController的一個例項物件。
       [[NSNotificationCenter defaultCenter] removeObserver:self
                                                        name:MPMoviePlayerPlaybackDidFinishNotification
                                                      
 
object:nil];

需求2: app進入後臺時播放器暫停，回到應用時繼續播放

遇到問題：由於MPMoviePlayerViewController監聽了UIApplicationDidEnterBackgroundNotification通知，當進入後臺時，呼叫stop方法，隨後接　　　　　　收到MPMoviePlayerPlaybackDidFinishNotification通知，呼叫dismiss方法移除自身檢視。

解決方法：移除MPMoviePlayerViewController對UIApplicationDidEnterBackgroundNotification和MPMoviePlayerPlaybackDidFinishNotification　　　　　　通知的監聽，並實現自己的監聽方法

// UIApplicationDidEnterBackgroundNotification通知
- (void)appEnterBackground:(NSNotification*)notice
{
　　// 進入後臺時記錄當前播放時間
    overlay_flags.playTimeWhenEnterBackground = _player.currentPlaybackTime;
    [_player pause];
}

// UIApplicationWillEnterForegroundNotification通知
- (void)appEnterForeground:(NSNotification*)notice
{
　　// 設定播放速率為正常速度，設定當前播放時間為進入後臺時的時間
    [_player setCurrentPlaybackRate:1.0];
    [_player setCurrentPlaybackTime:overlay_flags.playTimeWhenEnterBackground];
}