如何检测MPMoviePlayerController启动电影？

Question

我正在使用MPMoviePlayerController,如何检测电影实际开始播放的时间 - 而不是当用户摆弄搜索控件时？

从我做的测试中,我总是得到一个"加载状态改变"事件,并且(moviePlayer.loadState == MPMovieLoadStatePlayable)就TRUE在电影开始时和用户拖动搜索控件之后(即使他将它从一端拖到中间 - 不一定是电影的开头) .如何区分电影启动和搜索？

Answer 1

    MPMoviePlaybackState
    Constants describing the current playback state of the movie player.
    enum {
       MPMoviePlaybackStateStopped,
       MPMoviePlaybackStatePlaying,
       MPMoviePlaybackStatePaused,
       MPMoviePlaybackStateInterrupted,
       MPMoviePlaybackStateSeekingForward,
       MPMoviePlaybackStateSeekingBackward
    };
    typedef NSInteger MPMoviePlaybackState;

注册MPMoviePlayerPlaybackStateDidChangeNotification

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(MPMoviePlayerPlaybackStateDidChange:) 
                                                 name:MPMoviePlayerPlaybackStateDidChangeNotification 
                                               object:nil];

签入此函数MPMoviePlaybackState

- (void)MPMoviePlayerPlaybackStateDidChange:(NSNotification *)notification
    {
      if (player.playbackState == MPMoviePlaybackStatePlaying)
      { //playing
      }
      if (player.playbackState == MPMoviePlaybackStateStopped)
      { //stopped
      }if (player.playbackState == MPMoviePlaybackStatePaused)
      { //paused
      }if (player.playbackState == MPMoviePlaybackStateInterrupted)
      { //interrupted
      }if (player.playbackState == MPMoviePlaybackStateSeekingForward)
      { //seeking forward
      }if (player.playbackState == MPMoviePlaybackStateSeekingBackward)
      { //seeking backward
      }

}

删除通知

 [[NSNotificationCenter defaultCenter] removeObserver:self name:MPMoviePlayerPlaybackDidFinishNotification object:nil];

参考:MPMoviePlaybackState