播放视频－包括 本地视频 和 网络视频

MPMoviePlayerViewController 是播放视频的类，他是一个viewController，继承自UIViewController 同时又是UIViewController的类别。视频播放时候会全屏，

里面有两个关键函数

启动视频播放视图

- (void)presentMoviePlayerViewControllerAnimated:(MPMoviePlayerViewController *)moviePlayerViewController;

关闭视频播放视图

- (void)dismissMoviePlayerViewControllerAnimated;

示例代码

@interface ViewController :UIViewController

@property (nonatomic,strong)MPMoviePlayerViewController* playerViewController;

//播放本地视频

-(IBAction) playLocalVideo:(id)sender

{

   NSString * resPath = [[NSBundlemainBundle]resourcePath];

   NSString * filePath = [resPathstringByAppendingPathComponent:@"Movie.m4v"];

    

    //根据本地文件构造NSURL

   NSURL * fileUrl = [NSURLfileURLWithPath:filePath];

    

    playerViewController = [[MPMoviePlayerViewControlleralloc]initWithContentURL:fileUrl];

    [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(moviePlayerDidFinish:)name:MPMoviePlayerPlaybackDidFinishNotificationobject:[playerViewControllermoviePlayer]];

    

    

    [selfpresentMoviePlayerViewControllerAnimated:playerViewController];//   为何是self呢，因为MPMoviePlayerViewController是UIViewController的类别。

}

//播放网络视频

-(IBAction) playOnlineVideo:(id)sender

{

    //    NSString * resPath = [[NSBundle mainBundle] resourcePath];

    

    //注意这里构造函数与本地的不同 URLWithString

    NSURL * fileUrl = [NSURLURLWithString:@"http://192.168.1.100/~g7t2fi7/Movie.m4v"];

    

    playerViewController = [[MPMoviePlayerViewControlleralloc]initWithContentURL:fileUrl];

    [[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(moviePlayerDidFinish:)name:MPMoviePlayerPlaybackDidFinishNotificationobject:[playerViewControllermoviePlayer]];

    

    

    [selfpresentMoviePlayerViewControllerAnimated:playerViewController];

}