当屏幕快速关闭时，IOS 音频停止播放

Question

嗨，我是 IOS 和 Swift 的新手。

我正在制作一个应用程序，其中包含两个在第二个 ViewController 上播放的音频文件。我使用导航 Controller 和 push 转到第二个 ViewController。当我回到第一个 ViewController 时发现，音频不会停止，我使用了这段代码:

override func viewWillDisappear(animated: Bool) {
    audioPlaying.stop()
}

现在返回时音频会停止，但如果屏幕关闭意味着应用程序被锁定或处于后台时音频也会停止，我怎样才能摆脱这个？

更多代码:

var audioPlaying = AVAudioPlayer()

override func viewDidLoad() {
    super.viewDidLoad()
    audioPlaying = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("audioOne", ofType: "mp3")!), error: nil)
}

override func viewWillDisappear(animated: Bool) {
        audioPlaying.stop()
}
@IBAction func playPause(sender: AnyObject) {
    if buttonLabelChange == true {
        let image = UIImage(named: "btn_pause.png") as UIImage?
        playPauseButton.setBackgroundImage(image, forState: UIControlState.Normal)
        buttonLabelChange = false
        audioPlaying.play()
    }else{
        let image = UIImage(named: "btn_play.png") as UIImage?
        playPauseButton.setBackgroundImage(image, forState: UIControlState.Normal)
        buttonLabelChange = true
        audioPlaying.stop()
    }
}

@IBAction func sliderAction(sender: AnyObject) {
    audioPlaying.stop()
    audioPlaying.currentTime = NSTimeInterval(sliderOutlet.value)
    audioPlaying.prepareToPlay()
    audioPlaying.play()
    let image = UIImage(named: "btn_pause.png") as UIImage?
    playPauseButton.setBackgroundImage(image, forState: UIControlState.Normal)
    buttonLabelChange = false
}

Answer 1

您是否尝试过使用 isMovingFromParentViewController 方法？

该方法在弹出 View 时返回 true，但在手机锁定时返回 false。

override func viewWillDisappear(animated: Bool) {

        if self.isMovingFromParentViewController()
        {
                audioPlaying.stop()
        }
}