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父视图要实现手势协议UIGestureRecognizerDelegate

let gesture = UITapGestureRecognizer(target: self, action: #selector(handleGesture))        gesture.delegate = self        self.view.addGestureRecognizer(gesture)

实现UIGestureRecongizerDelegata

extension ViewController: UIGestureRecognizerDelegate {
       func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
           if touch.view?.isDescendantOfView(self.subView) == true {
               return false        }        return true    }}

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