Swift 停止系统音频

Question

I'm developing a Sleep Timer App. As soon as the timer is done, I want to stop the audio on the device. Is there any way to stop the system Sound or do I have to play a silent audio file?

I already tried this Code:

do {
     try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback)
     try AVAudioSession.sharedInstance().setActive(true) 
} catch { print(error.localizedDescription) }

Answer 1

.playback will only pause non-mixable sessions. If the other app has a mixable session, then it will continue. The only mode that will pause mixable sessions is .record (which will require that you request recording permission, even though you're not going to use it).