我建议您查看 Sameer对于Swift 2.0的回答，几个月前.与Swift 2.0完美配合.

I would suggest checking out Sameer's answer to this for Swift 2.0, just a few months back. Works perfectly with Swift 2.0.

let sess = AVAudioSession.sharedInstance()
if sess.otherAudioPlaying {
    _ = try? sess.setCategory(AVAudioSessionCategoryAmbient, withOptions: []) //
    _ = try? sess.setActive(true, withOptions: [])
}