How create target for UIButton with long-time press(repeating handler)?

Question

I try to create UIButton, which will increase some variable with long-pressing. So, when user touch button for long time increasing handler repeats.

I have something like this:

Swift 4.0

@IBOutlet var increaseButton: UIButton!
var someVariable = 0

...

increaseButton.addTarget(self, action: #selector(increase(sender:)), for: .touchUpInside)

...

@IBAction func increase(sender: UIButton) {
    someVariable += 1
}

Thanks for all answers!

Answer 1

You can use combination of three different control events for button mainly,

.touchDown
.touchUpOutside
.touchUpInside

And track the time between touchDown and any touchup events to change your handler time.