AVPlayer音量控制

Question

我想创建一个按钮来静音来自AVPlayer的音频.

为什么我不能将.volume与AVPlayer一起使用,只能使用AVAudioPlayer？还有另一种改变音量的方法吗？

例如 music.volume = 0.0;

谢谢你的回答.

Answer 1

从iOS 7开始,只需致电:

myAvPlayer.volume = 0;

否则,你将不得不使用恼人的setAudioMix解决方案.我在我的应用程序中检测到对此的支持,如下所示:

if ([mPlayer respondsToSelector:@selector(setVolume:)]) {
    mPlayer.volume = 0.0;
 } else {
     NSArray *audioTracks = mPlayerItem.asset.tracks;

     // Mute all the audio tracks
     NSMutableArray *allAudioParams = [NSMutableArray array];
     for (AVAssetTrack *track in audioTracks) {
         AVMutableAudioMixInputParameters *audioInputParams =[AVMutableAudioMixInputParameters audioMixInputParameters];
         [audioInputParams setVolume:0.0 atTime:kCMTimeZero];
         [audioInputParams setTrackID:[track trackID]];
         [allAudioParams addObject:audioInputParams];
     }
     AVMutableAudioMix *audioZeroMix = [AVMutableAudioMix audioMix];
     [audioZeroMix setInputParameters:allAudioParams];

     [mPlayerItem setAudioMix:audioZeroMix]; // Mute the player item
 }