iOS - 播放多个视频

Question

我在MediaPlayer框架中使用此代码来播放视频：

-(void)GrommeVideoExcerpt1
{
NSURL *url1 = [NSURL fileURLWithPath:[[NSBundle mainBundle]
                                     pathForResource:@"GrommeVideoExcerpt1" ofType:@"mp4"]];
grommePlayer1 =  [[MPMoviePlayerController alloc]
                  initWithContentURL:url1];

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(moviePlayBackDidFinish:)
                                             name:MPMoviePlayerPlaybackDidFinishNotification
                                           object:grommePlayer1];

grommePlayer1.controlStyle = MPMovieControlStyleDefault;
grommePlayer1.shouldAutoplay = YES;
[self.view addSubview:grommePlayer1.view];
[grommePlayer1 setFullscreen:YES animated:YES];
}

但是，当我播放一个视频，然后导航到另一个视频并尝试播放时，该应用程序崩溃了。它给了我这个错误：

http://pastebin.com/nUGLXEAi

Answer 1

此处的问题是您要在视频播放完毕时添加通知，并且该通知会触发您没有的方法（moviePlayBackDidFinish:）导致崩溃。

您可以实现此方法或删除通知，取决于您在完成视频播放后要执行的操作，即删除播放视频的viewController等。

//Register notification
[[NSNotificationCenter defaultCenter] addObserver:self
                                     selector:@selector(moviePlayBackDidFinish:)
                                         name:MPMoviePlayerPlaybackDidFinishNotification
                                       object:nil];
//Then the method ...
-(void) moviePlaybackDidFinish:(NSNotification *)aNotification{
  [grommePlayer1.view removeFromSuperview];
  grommePlayer1 = nil;
}