UIView上添加UITapGestureRecognizer手势后，导致view上的UIButton无响应

通过手势代理方法判断处理，代码如下

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

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
    guard let touchView = touch.view else {
        return false
    }
    if touchView.isKind(of: UIButton.self) {
        return false
    }
    return true
}