MPMovieplayercontroller

播放视频文件通常使用 MPMoviePlayerViewController 和 MPMoviePlayerController。这二者的区别就是MPMoviePlayerViewController里面包含了一个MPMoviePlayerController
先说MPMoviePlayerController
首先要包含 #import <MediaPlayer/MediaPlayer.h>头文件和MediaPlayer.framework。

- (void)createMPPlayerController:(NSString *)sFileNamePath {
  NSURL *movieURL = [NSURL fileURLWithPath:sFileNamePath];
 MPMoviePlayerController *movewController =[[MPMoviePlayerController alloc] initWithContentURL:movieURL];
 [movewController prepareToPlay];
 [self.view addSubview:movewController.view];//设置写在添加以后   // 这里是addSubView
 movewController.shouldAutoplay=YES;
 [movewController setControlStyle:MPMovieControlStyleDefault];
 [movewController setFullscreen:YES];
 [movewController.view setFrame:self.view.bounds];
 这里注册相关操做的通知

 [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(movieFinishedCallback:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moveViewController.movewController]; //播放完后的通知

 [movewController release];
}

-(void)movieFinishedCallback:(NSNotification*)notify {
    MPMoviePlayerController* theMovie = [notifyobject];
    [[NSNotificationCenterdefaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:theMovie];
    [theMovie.view removeFromSuperview];
    [theMovie release];
}
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2.介绍下MPMoviePlayerViewController。 
注意：MPMoviePlayerViewController 必须 presentMoviePlayerViewControllerAnimated方式添加，不然Done按钮是不会响应通知MPMoviePlayerPlaybackDidFinishNotification事件的；

- (void)createMPPlayerController:(NSString *)sFileNamePath {
    MPMoviePlayerViewController *moviePlayer =[[MPMoviePlayerViewControlleralloc] initWithContentURL:[NSURLfileURLWithPath:sFileNamePath]];
    [moviePlayer.moviePlayerprepareToPlay];
    [selfpresentMoviePlayerViewControllerAnimated:moviePlayer]; // 这里是presentMoviePlayerViewControllerAnimated
    [moviePlayer.moviePlayersetControlStyle:MPMovieControlStyleFullscreen];
    [moviePlayer.view setBackgroundColor:[UIColor clearColor]];
    [moviePlayer.view setFrame:self.view.bounds];
    [[NSNotificationCenterdefaultCenter] addObserver:self
                                             selector:@selector(movieFinishedCallback:)
                                                 name:MPMoviePlayerPlaybackDidFinishNotification
                                               object:moviePlayer.moviePlayer];
    [moviePlayer release];
}

-(void)movieStateChangeCallback:(NSNotification*)notify  {
   //点击中的播放/ 暂停按钮响应的通知
}
-(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];
}