我正在尝试显示UIAlertContoller并在VoiceOver用户执行滑动手势时关闭它:overridefuncaccessibilityPerformMagicTap()->Bool{showPopup()returntrue}overridefuncaccessibilityPerformEscape()->Bool{print("close")returntrue}funcshowPopup(){baseAlert=UIAlertController(title:"Popup",message:"Chooseanoption",preferredStyle:.Alert)l