我打算检测我的应用程序上的所有双指向下滑动手势。我扩展了Window类,并添加了这个:publicextensionUIWindow{funcinitGestureTouch(){letswipeDown=UISwipeGestureRecognizer(target:self,action:#selector(handleGesture))swipeDown.direction=.downswipeDown.numberOfTouchesRequired=2self.addGestureRecognizer(swipeDown)}}它几乎无处不在,除了ScrollViews(Tabl