UITapGestureRecognizer 和 UIBarButtonItem.action 事件冲突

UITapGestureRecognizer 和 UIBarButtonItem.action 事件冲突

• UITapGestureRecognizer在整个UIView上
• UIToolbar在UIView上

解决方案
实现 UIGestureRecognizerDelegate ，并设置 UITapGestureRecognizer 的 delegate

extension XXXX: UIGestureRecognizerDelegate {
    // MARK: UIGestureRecognizerDelegate

    /*
    此方法在window对象在有触摸事件发生时，
    调用gesture recognizer的touchesBegan:withEvent:方法之前调用，
    如果返回NO,则gesture recognizer不会看到此触摸事件。(默认情况下为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
        }
    }
}