Tap gesture events on overlapping area

Question

I have a view that is with the black border and it has two different views on it. And these views are overlapping in a small area. And each of them has own UITapGestureRecognizer. When I tap each item's discrete area, the action of that item is triggered. But when I tap the common area, only the second view's action is triggered. I want that both actions have to be triggered. How can I achieve this? Here is my code:

class ViewController: UIViewController {

  @IBOutlet weak var view1: UIView!
  @IBOutlet weak var view2: UIView!
  @IBOutlet weak var outerView: UIView!

  override func viewDidLoad() {
      super.viewDidLoad()
      outerView.layer.borderWidth = 2.0
      outerView.layer.borderColor = UIColor.black.cgColor
      view1.layer.borderWidth = 2.0
      view1.layer.borderColor = UIColor.red.cgColor
      view2.layer.borderWidth = 2.0
      view2.layer.borderColor = UIColor.blue.cgColor
      self.initialize()
  }

  private func initialize(){
      let tapGesture1 = UITapGestureRecognizer(target: self, action: #selector(detectTap1(_:)))
      let tapGesture2 = UITapGestureRecognizer(target: self, action: #selector(detectTap2(_:)))
      self.view1.addGestureRecognizer(tapGesture1)
      self.view2.addGestureRecognizer(tapGesture2)
  }

  @objc func detectTap1(_ gesture : UITapGestureRecognizer) {
      print("detectTap1")
  }

  @objc func detectTap2(_ gesture : UITapGestureRecognizer) {
      print("detectTap2")
  }
}

Kindly share your suggestions.

Answer 1

For this problem i have found this solution, maybe is not the best solution but it works, i will look for further improvements anyway

I had subclassed UIGestureRecognizer class

Updated

import UIKit
import UIKit.UIGestureRecognizerSubclass

class CustomGestureRecognizer: UIGestureRecognizer {

    var anotherGestureRecognizer : CustomGestureRecognizer?
    private var touchBeganSended : Bool = false
    private var touchLocation : CGPoint?

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
        super.touchesBegan(touches, with: event)
        if let validTouch = touches.first?.location(in: self.view) {
            if (self.view!.point(inside: validTouch, with: event)) {
                if(!touchBeganSended) {
                    touchBeganSended = true
                    touchLocation = validTouch
                    anotherGestureRecognizer?.touchesBegan(touches, with: event)
                    state = .recognized
                }
            }
        }
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
        super.touchesEnded(touches, with: event)
        if let validTouch = touches.first?.location(in: self.view) {
            if (self.view!.point(inside: validTouch, with: event)) {
                if(touchBeganSended) {
                    touchBeganSended = false
                    anotherGestureRecognizer?.touchesEnded(touches, with: event)
                    state = .recognized
                }
            }
        }
    }

    override func location(in view: UIView?) -> CGPoint {
        if let desiredView = view {
            if(desiredView == self.view) {
                return touchLocation ?? CGPoint(x: 0, y: 0)
            } else {
                return super.location(in: view)
            }
        } else {
            return super.location(in: view)
        }
    }
}

Updated

then you need to modify your initialize() method to this one, with the last update you don't need to take into account which view is on top on view hierarchy

private func initialize(){
    let tapGesture1 = CustomGestureRecognizer(target: self, action: #selector(detectTap1(_:)))
    let tapGesture2 = CustomGestureRecognizer(target: self, action: #selector(detectTap2(_:)))
    tapGesture1.cancelsTouchesInView = true
    tapGesture1.delegate = self
    tapGesture2.cancelsTouchesInView = true
    tapGesture2.delegate = self
    self.view1.addGestureRecognizer(tapGesture1)
    tapGesture1.anotherGestureRecognizer = tapGesture2
    tapGesture2.anotherGestureRecognizer = tapGesture1
    self.view2.addGestureRecognizer(tapGesture2)
}

this works as you can see here