iphone mpmovieplayercontroller mp3显示黑色背景

Question

我有一个按钮，触发mpmovieplayercontroller播放一些流式音频。当控制器播放一切正常，我看到灰色的QuickTime背景。

但是，当我停止播放器并再次按下按钮时，我仍然听到音频，但背景现在变成黑色。而且，如果我在播放mp3之前切换到视频流，QuickTime背景会重新出现。

是否有人知道如何阻止quicktime背景消失。

任何帮助，非常感谢。

-(IBAction) playmp3 { 
NSString *medialink = @"http://someWebAddress.mp3"; 
self.player = [[[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:medialink]] autorelease]; 
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(moviePlayerDidFinish:) name:@"MPMoviePlayerPlaybackDidFinishNotification" object:self.player]; 
[self.player play]; 
} 

- (void)moviePlayerDidFinish:(NSNotification *)obj { 
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"MPMoviePlayerPlaybackDidFinishNotification" object:self.player]; 
self.player = nil; 
} 

Answer 1

发现答案基本上与玩家不能正确停止有关。您需要将DidFinish功能更改为以下内容

- (void)moviePlayerDidFinish:(NSNotification *)obj { 
[[NSNotificationCenter defaultCenter] removeObserver:self name:@"MPMoviePlayerPlaybackDidFinishNotification" object:self.player]; 
self.player.initialPlaybackTime = -1.0; 
[self.player stop]; 
self.player = nil; 
}