我试图创建一个应该可拖动的标签。但是拖动的事件没有触发(用断点检查)。下面是代码。-(IBAction)InsertText:(UIBarButtonItem*)sender{UILabel*lblWatermark=[[UILabelalloc]initWithFrame:currentImage.frame];lblWatermark.text=@"Copyright";lblWatermark.userInteractionEnabled=YES;[lblWatermarksizeToFit];UIPanGestureRecognizer*gesture=[[UIPanGestu