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Flex ApplicationÀïµÄaddChild()

ת×Ô:http://www.cnblogs.com/jiahuafu/archive/2009/03/20/1417679.html
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private function init():void
{
var sp:Sprite = new Sprite();
addChild(sp);
}
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Application→LayoutContainer→Container→UIComponent→FlexSprite→Sprite→DisplayObjectContainer
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public override function addChild(child:DisplayObject):DisplayObject
public override function addChild(child:DisplayObject):DisplayObject
ËäÈ»²ÎÊýchildµÄÀàÐÍÊÇDisplayObject£¬µ«ÊÇËü±ØÐëʵÏÖIUIComponent½Ó¿Ú£¨ËùÓÐFlex×é¼þ¶¼ÊµÏÖÁËÕâÒ»½Ó¿Ú£©£¬²ÅÄÜÌí¼Ó¡£
Èç¹ûÒªÔÚApplicationÀïÌí¼ÓSprite£¬¿ÉÒÔÏȰÑËü×°½øÒ»¸öUIComponent£¬È»ºóÔÙÌí¼ÓÕâ¸öUIComponent£º
import mx.core.UIComponent;
private function init():void
{
var sp:Sprite = new Sprite();
var uc:UIComponent = new UIComponent();
uc.addChild(sp);
addChild(uc);
}



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package Package
{
 import flash.display.DisplayObject;
 import flash.display.Loader;
 import flash.events.*;
 import flash.net.URLRequest;
 
 import mx.core.UIComponent;
 import mx.events.FlexEvent;
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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Script>
  <![CDATA[
  function chkbox():void
  {
   var menssage:String = "";
   if (c ......
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