我正在尝试将UITapGestureRecognizer添加到imageview中，如下所示letgest=UITapGestureRecognizer(target:self,action:Selector(imgPressed()));gest.delegate=selfthalaImg.addGestureRecognizer(gest)这里是imgPressed函数:funcimgPressed(){letalert=UIAlertController(title:"Img",message:"imgpressed",preferredStyle:.Alert)letokBut