Swift 4 - 带 AVAudioPlayer 的 UISlider

Question

我正在使用 AVAudioPlayer 播放音频，现在我正在尝试使用 UISlider 作为音频时间轴

@IBOutlet var audioSlider: UISlider!

override func viewDidLoad() {

audioSlider.setValue(0, animated: false)
timer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: (#selector(PlayerController.updateTimer)), userInfo: nil, repeats: true)

}

@objc func updateTimer() {

        if(audio != nil)
        {

            audioSlider.setValue(Float(Int((self.audio?.currentTime)!)), animated: false)

        }

    }

但我认为它不起作用，我的 UISlider 会立即从头到尾。我希望我的 UISlider

能顺利过渡

这是我播放音频的方式：

@IBAction func playButtonPressed(_ sender: Any) {

        if(playButton.titleLabel?.text == "Play")
        {

            postPlay(postid: self.postid) { results in

                DispatchQueue.main.async {

                    do {
                        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
                        try AVAudioSession.sharedInstance().setActive(true)
                    }
                    catch {
                    }

                    self.audio?.delegate = self
                    self.audio?.numberOfLoops = 0
                    self.playButton.titleLabel?.text = "Stop"
                    self.audio?.play()
                    self.playCount = self.playCount + 1
                    self.plays.text = "Total Plays: " + self.playCount.description

                }

            }

        }
        else
        {
            playButton.titleLabel?.text = "Resume"
            audio?.stop()
        }

    }

Answer 1

UISlider 需要介于 0.0 和 1.0 之间的值。为此，您必须将当前进度除以总时间。

例如

audioSlider.setValue(Float(self.audio?.currentTime! / self.audio?.duration!), animated: false)

Swift 4 - 带 AVAudioPlayer 的 UISlider

Swift 4 - UISlider with AVAudioPlayer

ios

swift

avaudioplayer