试了这个方法,只能单纯增大声音或者减小声音,并没有任何实质性的模拟到按下音量+按键和音量-按键。
MPMusicPlayerController *ipodMusicPlayer = [MPMusicPlayerController iPodMusicPlayer];
[ipodMusicPlayer beginGeneratingPlaybackNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(trackTheDeviceVolume:)
name:MPMusicPlayerControllerVolumeDidChangeNotification
object:nil];
有没有思路和方法一起研究下