自动删除子对象/属性/侦听(as3.0)

package net.L4cd.display{
  import flash.display.MovieClip;
  import flash.events.Event;
  dynamic public class iMovieClip extends MovieClip{
    private var lis:Array;//定义一数组保存侦听
    public function iMovieClip(){
      lis = new Array()
      addEventListener(Event.REMOVED,remove)//侦听删除事件
    }
    
    //重写addEventListener,在增加侦听的时候..把相应的事件保存到数组
    override public function addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void{
      lis.push([type,listener,useCapture])
      super.addEventListener(type,listener,useCapture,priority,useWeakReference)
    }
    
    //"自我毁灭"的方法
    private function remove(e:Event):void{
      if(e.currentTarget != e.target)return
      stop()
      //删除子对象
      trace("删除前有子对象",numChildren)
      while(numChildren > 0){
        removeChildAt(0)
      }
      trace("删除后有子对象",numChildren)
      
      //删除动态属性
      for(var k:String in this){
        trace("删除属性",k)
        delete this[k]
      }
      
      //删除侦听
      for(var i:uint=0;i<lis.length;i++){
        trace("删除Listener",lis[i][0])
        removeEventListener(lis[i][0],lis[i][1],lis[i][2])
      }
      lis = null
    }
  }
}

import net.L4cd.display.iMovieClip;
var mc:MovieClip = new iMovieClip()
mc.addEventListener(Event.ADDED,aaaa)
mc.addEventListener(Event.ADDED_TO_STAGE,aaaa)
mc.addEventListener(Event.ENTER_FRAME,aaaa)
mc.addEventListener(MouseEvent.CLICK,aaaa)
mc.addEventListener(MouseEvent.MOUSE_DOWN,aaaa)
mc.a = "http://L4cd.Net"
mc.b = "我是动态属性2"
mc.name = "我是MC"
addChild(mc)
function aaaa(e:Event){
  
}
removeChild(mc)
mc = null

删除前有子对象 0
删除后有子对象 0
删除属性 b
删除属性 a
删除Listener removed
删除Listener added
删除Listener addedToStage
删除Listener enterFrame
删除Listener click
删除Listener mouseDown