如何在xcode for mac中为AVPlayer制作音量滑块

所以我有我的电台应用程序的简单代码：

-(IBAction)europaPlus:(id)sender{ NSLog(@"EuropaPlus work"); if (clicked == 0) { clicked = 1; NSString *urlAddress = @"http://cast.europaplus.ua/europaplus.aac"; NSURL *urlStream = [NSURL URLWithString:urlAddress]; radioPlus = [[AVPlayer alloc] initWithURL:urlStream]; [radioPlus play];} else { NSLog(@"EuropaPlus not work"); [radioPlus release]; clicked = 0; } } 

此外，我只使用AVPLAYER进行URL连接，但是如何在MAC OS中对AVPlayer进行音量控制。 我知道在IOS中的MPMVolumeControl，但我有Mac OS项目。谢谢。

Answer 1

 player = [[AVAudioPlayer alloc] initWithContentsOfURL: [NSURL fileURLWithPath:resourcePath] error:&err]; player.delegate = self; [player play]; player.volume=.number; player.numberOfLoops=-number; 

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 -(IBAction)slidervaluechanged { player.volume=slider.value; } 

欲了解更多信息查看链接：

http://developer.apple.com/iphone/library/documentation/MediaPlayer/Reference/MPVolumeView_Class/Reference/Reference.html和你如何实现一个MPVolumeView？