Swift AVPlayer 到耳机

Question

我有一个简单的音频播放器，效果很好。我正在播放远程 URL MP3。我的代码：

@IBAction func playAudio(sender: AnyObject) {
        let url = self.productAudio
        let playerItem = AVPlayerItem( URL:NSURL( string:url ) )
        player = AVPlayer(playerItem:playerItem)
        player.
        player.rate = 1.0;
        player.play()
}

但音频是由扬声器输出的。如何通过耳机播放音频？

Answer 1

雨燕5.0

let session = AVAudioSession.sharedInstance()

        do{
            try session.setCategory(.playAndRecord)
            try session.overrideOutputAudioPort(AVAudioSession.PortOverride.none)
            try session.setActive(true)
        } catch {
            print ("\(#file) - \(#function) error: \(error.localizedDescription)")
        }