How to enable “tap and slide” in a UISlider?

Question

What I want to get is a UISlider which lets the user not only slide when he starts on its thumbRect, but also when he taps elsewhere. When the user

Answer 1

I didn't check David Williames answer, but I'll post my solution in case someone is looking for another way to do it.

Swift 4

First create a custom UISlider so that it will detect touches on the bar as well :

class CustomSlider: UISlider {
    override func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
        return true
    }
}

(don't forget to set your slider to be this CustomSlider, on storyboard)

The on viewDidLoad of the view controller that is displaying the slider:

self.slider.addTarget(self, action: #selector(sliderTap), for: .touchDown)

(this is only used to pause the player when moving the slider)

Then, on your UISlider action:

@IBAction func moveSlider(_ sender: CustomSlider, forEvent event: UIEvent) {
    if let touchEvent = event.allTouches?.first {
        switch touchEvent.phase {
            case .ended, .cancelled, .stationary:
                //here, start playing if needed
                startPlaying()                    
            default:
                break
        }
    }
}

And on your "sliderTap" selector method:

@objc func sliderTap() {
    //pause the player, if you want
    audioPlayer?.pause()
}

Suggestion: set the player "currentTime" before starting to play:

private func startPlaying() {
    audioPlayer?.currentTime = Double(slider.value)
    audioPlayer?.play()
}