学步园

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
 <mx:Tree labelFunction="treeFun" x="10" y="10" width="199" height="327" id="tree" folderOpenIcon="@Embed(source='img/add_folder.png')"
    defaultLeafIcon="@Embed(source='images/scroll_arrow_down_over.png')" creationComplete="load()" fontSize="14"
    openEasingFunction="Bounce.easeOut" openDuration="500" dataTipFunction="tipFun" showDataTips="true">
 </mx:Tree>

 <mx:XML id="treeXMLSource">
  <node label="grandFather">
   <node label="father">
    <node label="me">
     <node label="son">
      <node label="grandson">
       <node label="greatGrandSon"/>
      </node>
      <node label="granddaughter"/>
     </node>
     <node label="daughter"/>
    </node>
   </node>
   <node label="Uncle"/>
   <node label="Aunt">
    <node label="cousin"/>
    <node label="cousin"/>
   </node>
  </node>

 </mx:XML>
  <mx:Script>
  <![CDATA[
   [Bindable]
   [Embed(source="images/scroll_arrow_down_over.png")]
   public var ico1:Class;

   //加载树数据源
   private function load():void
   {
    tree.dataProvider=treeXMLSource;
   }
   //labelFunction改变值
   private function treeFun(item:XML):String{
    return item.@label+"-"+"888";
   }
   //toolTip函数
   private function tipFun(it:Object):String{
    return it.@label;
   }
   ]]>
 </mx:Script>
</mx:Application>