Swift 4 - AVAudioPlayer set currentTime from UISlider

Question

I have a UISlider and AvAudioPlayer, currently I am able to set the UISlider to the currentTime of a AvAudioPlayer like so:

timer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: (#selector(RecordController.updateTimer)), userInfo: nil, repeats: true)

@objc func updateTimer() {
    if(audio != nil) {
       audioSlider.setValue(Float((self.audio?.currentTime)! / (self.audio?.duration)!), animated: false)
    }
}

But how would I set the currentTime of the AVAudioPlayer when changing the value of the UISlider?

@IBAction func audioSliderUpdated(_ sender: Any) {
}

see this for e.g : https://stackoverflow.com/questions/43062870/add-custom-controls-to-avplayer-in-swift/43070099#43070099 — Anbu.Karthik, Jul 10 '18 at 04:35

score 2 · Accepted Answer · answered Jul 10 '18 at 02:50

2

You can use the currentTime property of AVAudioPlayer:

@IBAction func audioSliderUpdated(_ sender: Any) {
  if let slider = sender as? UISlider {
    self.audio?.currentTime = slider.value    
  }
}

answered Jul 10 '18 at 02:50

Christian Abella

5,747
2
30
42

score 1 · Answer 2 · answered Jul 10 '18 at 04:30

1

Use this, slider value changes according to time

 @IBAction func slide(_ sender: UISlider) {
    self.audio.currentTime = TimeInterval(slider.value)
}

answered Jul 10 '18 at 04:30

chandra1234

357
6
15

ngbaanh · Answer 3 · 2018-07-10T05:23:07.397

You have to convert your slider value to a new value which based on your media file.

First, you must config your slider values to work in normalized values (from 0.0 to 1.0)

/// call this on viewDidLoad: configDefaults(for: audioSlider)
func configDefaults(for slider: UISlider)
    slider.minimumValue = 0.0
    slider.maximumValue = 1.0
}

Then you should calculate currentTime from audioSlider.value and duration then set it to the player.currentTime.

@IBAction func audioSliderUpdated(_ sender: Any) {
    guard let slider = sender as? UISlider,
        let player = audio else {
        return
    }
    player.currentTime = Double(slider.value) * player.duration
}

Swift 4 - AVAudioPlayer set currentTime from UISlider

3 Answers3