我一直在使用UIPanGestureRecognizer来识别触摸，但我想用动画的固定开始到结束位置替换它。请看下面的代码:panGestureDidMove:funcpanGestureDidMove(gesture:UIPanGestureRecognizer){ifgesture.state==.Ended||gesture.state==.Failed||gesture.state==.Cancelled{}else{letadditionalHeight=max(gesture.translationInView(view).y,0)letwaveHeight=min(add