Question

我在ipad视频中遇到了问题。我的代码工作正常我的意思是它播放视频，但一旦视频到达终点。不调用回调方法。

按下播放视频按钮时会调用此方法。

-(IBAction) playVideo : (id) sender
{
  [self initPlayingVideo:@"toyVid.mp4"];
}

此方法处理视频播放。

-(void) initPlayingVideo: (NSString *) videoFile
{
  NSString *moviePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:videoFile];

  theMovie = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL fileURLWithPath:moviePath]];
  theMovie.moviePlayer.scalingMode = MPMovieScalingModeAspectFit;
  theMovie.moviePlayer.controlStyle = MPMovieControlStyleFullscreen;


  [self.view addSubview:theMovie.view];

  [[NSNotificationCenter defaultCenter]
  addObserver:self
  selector:@selector(videoPlayerDidFinishPlaying
  name:MPMoviePlayerPlaybackDidFinishNotification
  object:theMovie];

  videoPlayer = [theMovie moviePlayer];
  [videoPlayer play];
}

这是回调方法。

-(void) videoPlayerDidFinishPlaying: (NSNotification*)aNotification
{
  theMovie = [aNotification object];
  [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:theMovie.moviePlayer];
  [videoPlayer stop];
  [theMovie.moviePlayer release];
  [videoPlayer release];
  [theMovie.view removeFromSuperview];
}

我在哪里做错了？请指导。

此致兰詹

Answer 1

你错过了选择中的：和）吗？我想）可能是你的拼写错误，否则你无法编译你的代码。您的选择需要一个参数。它应该是：

selector:@selector(videoPlayerDidFinishPlaying:)

这将与您的实例方法匹配。我猜你没有参数。

iPad videoPlayerDidFinishPlaying回调方法无响应

1 个答案: