Keep UIButton Selected/Highlighted after touch

Question

I\'d like my button to remain highlighted after the user taps it. If the user taps the button again I\'d like it to become de-selected/unhighlighted. I\'m not sure how to go

Answer 1

func highlightButton(button: UIButton) {
       button.highlighted = true
}

@IBAction func touched(sender: UIButton) {
    let timer = NSTimer.scheduledTimerWithTimeInterval(0.0, target: self, selector: Selector("highlightButton(sender)"), userInfo: nil, repeats: true)
}