如何在此函數中正確刪除事件偵聽器

Question

public function doAddItem(itemConcepto:int):void{ 
       modalCfd = new modalCFDItems(); 
       modalCfd.addEventListener(Event.CLOSE, closeHandler); 
       modalCfd.addEventListener("addItemResult", addItem_resultHandler); 
       modalCfd.addEventListener("addItemResize", addItemResize_resultHandler);     
       PopUpManager.addPopUp(modalCfd, this, true) 
       PopUpManager.centerPopUp(modalCfd); 
      } 
      private function addItem_resultHandler(event:Event):void{ 
       addItemStuff(); 
       PopUpManager.removePopUp(modalCfd); 
       removeListeners("modalCfd"); 
      } 
      private function closeHandler(event:CloseEvent):void{ 
       PopUpManager.removePopUp(modalCfd); 
       removeListeners("modalCfd"); 
      } 
      public function removeListeners(listener:String):void{ 
       if(listener == "modalCfd"){ 
        modalCfd.removeEventListener("addItemResult", addItem_resultHandler); 
        modalCfd.removeEventListener("addItemResize", addItemResize_resultHandler); 
        modalCfd.removeEventListener(Event.CLOSE , closeHandler); 
       } 
      } 

正如你所看到的，我是一個具有良好實踐的新手（幾乎任何東西）我如何正確刪除事件偵聽器？這是我在那裏處理的一個彈出窗口。對不起，如果該功能沒有多大意義，我簡化它以適應stackoverflow。

Answer 1

您已經有了對象的引用，所以只需在您的removelisteners函數中使用它。

public function doAddItem(itemConcepto:int):void{ 
       modalCfd = new modalCFDItems(); 
       modalCfd.addEventListener(Event.CLOSE, closeHandler); 
       modalCfd.addEventListener("addItemResult", addItem_resultHandler); 
       modalCfd.addEventListener("addItemResize", addItemResize_resultHandler);     
       PopUpManager.addPopUp(modalCfd, this, true) 
       PopUpManager.centerPopUp(modalCfd); 
      } 
      private function addItem_resultHandler(event:Event):void{ 
       addItemStuff(); 
       PopUpManager.removePopUp(modalCfd); 
       removeListeners(); 
      } 
      private function closeHandler(event:CloseEvent):void{ 
       PopUpManager.removePopUp(modalCfd); 
       removeListeners(); 
      } 
      public function removeListeners():void{ 
       modalCfd.removeEventListener("addItemResult", addItem_resultHandler); 
       modalCfd.removeEventListener("addItemResize", addItemResize_resultHandler); 
       modalCfd.removeEventListener(Event.CLOSE , closeHandler); 
      }