UITapGestureRecognizer 和 UIBarButtonItem.action 事件衝突

#UITapGestureRecognizer 和 UIBarButtonItem.action 事件衝突

UITapGestureRecognizer在整個UIView上 UIToolbar在UIView上

###解決方案

實現 UIGestureRecognizerDelegate ，並設置 UITapGestureRecognizer 的 delegate

extension XXXX: UIGestureRecognizerDelegate {
    // MARK: UIGestureRecognizerDelegate

    /*
    此方法在window對象在有觸摸事件發生時，
    調用gesture recognizer的touchesBegan:withEvent:方法以前調用，
    若是返回NO,則gesture recognizer不會看到此觸摸事件。(默認狀況下爲YES).
    */
    func gestureRecognizer(
	    gestureRecognizer: UIGestureRecognizer, 
	    shouldReceiveTouch touch: UITouch
    ) -> Bool {
        /*
         UIView ---> UIToolbar ---> UIBarButtonItem ---> action
         touch.view is UIToolbarTextButton
         touch.view?.superview is UIToolbar
         */
        if touch.view?.superview is UIToolbar {
            return false
        }else{
            return true
        }
    }
}