我认为它具有相同的作用，但是您是否尝试过像这样通过AVFoundation设置设置?

I think it does the same thing, but have you tried, setting the setting throught AVFoundation like so?

 [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
    [[AVAudioSession sharedInstance] setActive: YES error: nil];