How do I implement the UITapGestureRecognizer into my application

Question

I am quite new to programming and Objective C. I was wondering how to make an app which has a blank screen and a timer that goes for one minute. You are meant to tap as fast

Answer 1

Works in Xcode 11.4, Swift 5

class ViewController: UIViewController {

    @IBOutlet weak var targetView: UIView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let tap = UITapGestureRecognizer(target: self, action: #selector(self.touchCallback(_:)))
        self.targetView.addGestureRecognizer(tap)
    }

    @objc func touchCallback(_ sender: UITapGestureRecognizer? = nil) {
        if(sender?.state == .ended) {
            print("tapped")
        }
    }
}

// If you want to touch start, available touchesBegan
class ViewController: UIViewController {

    @IBOutlet weak var targetView: UIView!
    override func viewDidLoad() {
        super.viewDidLoad()
    }


    override func touchesBegan(_ touches: Set, with event: UIEvent?) {
          for touch in touches {
              let location = touch.location(in: targetView)
              print(location)
          }
      }
}