didTapView.swift

@objc func didTapView(_ gestureRecognizer: UITapGestureRecognizer) {
    let location = gestureRecognizer.location(in: view)
    let circleView = addCircleView(in: location)

    let pinchGestureRecognizer = UIPinchGestureRecognizer(target: self, action: #selector(didPinchView))
    circleView.addGestureRecognizer(pinchGestureRecognizer)

    let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(didPanView))
    circleView.addGestureRecognizer(panGestureRecognizer)
}