MPMoviePlayerController在收到视频完成通知后不会关闭视频。 iOS6的

Question

以下代码会在单击按钮时打开视频，但是当视频完成时，它不会删除视频。它只是停在最后一帧。收到通知后是否应该将其删除？

    #import <UIKit/UIKit.h>
        #import <MediaPlayer/MediaPlayer.h>

        @interface ViewController : UIViewController{
            MPMoviePlayerController *moviePlayer;
    }
    @property (strong, nonatomic) MPMoviePlayerController *moviePlayer;

    -(IBAction)playMovie:(id)sender; 
    - (void)moviePlaybackComplete:(NSNotification *)notification;
    @end


    #import "ViewController.h"

    @interface ViewController ()

    @end

    @implementation ViewController
    @synthesize moviePlayer;


    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view, typically from a nib.

        UIButton *video_btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        video_btn.frame = CGRectMake(0, 0, 100, 50);
        [video_btn setTitle:@"Moonrise" forState:UIControlStateNormal];
        [video_btn addTarget:self action:@selector(playMovie:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:video_btn];



    }

    -(IBAction)playMovie:(id)sender
    {

        NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"moonrise" ofType:@"mp4"]];
        moviePlayer = [[MPMoviePlayerController alloc] initWithContentURL:url];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(moviePlaybackComplete:)
                                                     name:MPMoviePlayerPlaybackDidFinishNotification
                                                   object:moviePlayer];

        [self.view addSubview:moviePlayer.view];

        [moviePlayer setFullscreen:YES animated:YES];
        [moviePlayer play];
    }

    - (void)moviePlaybackComplete:(NSNotification *)notification
    {

        MPMoviePlayerController *moviePlayerController = [notification object];
        [[NSNotificationCenter defaultCenter] removeObserver:self
                                                        name:MPMoviePlayerPlaybackDidFinishNotification
                                                      object:moviePlayerController];

        [moviePlayerController.view removeFromSuperview];



    }



    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }

    @end

编辑：

我很想知道这是不是一个错误？这是一个如此简单的功能，所以我不知道怎么会搞砸了。