音/视频处理

// 加载视频资源

NSString *urlString = [[NSBundle mainBundle] pathForResource:@"sample_iTunes" ofType:@"mov"];

NSURL *url = [NSURL fileURLWithPath:urlString];

// 创建播放器

_player = [[MPMoviePlayerController alloc] initWithContentURL:url];

// 设置尺寸

_player.view.frame = self.view.bounds;

_player.view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

// 添加到控制器的view上

[self.view addSubview:_player.view];

// 播放

[_player play];

// 监听播放状态的改变
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(videoStateChange) 
　　　　name:MPMoviePlayerPlaybackStateDidChangeNotification object:_player];
// 监听播放器结束全屏
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(exitFullscreen)
　　　　name:MPMoviePlayerDidExitFullscreenNotification object:_player];

是否要自动播放
@property(nonatomic) BOOL shouldAutoplay;

全屏显示
@property(nonatomic, getter=isFullscreen) BOOL fullscreen;
- (void)setFullscreen:(BOOL)fullscreen animated:(BOOL)animated;

截取视频中的图片
- (void)requestThumbnailImagesAtTimes:(NSArray *)playbackTimes timeOption:(MPMovieTimeOption)option;