flex的tree根据属性值改变所有节点图标的方法

代码：

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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" >
<mx:Script>
<![CDATA[
import mx.collections.XMLListCollection;

[Embed(source="assets/max_over.gif")] //这是图片的相对地址
[Bindable]
public var OKicon:Class;

[Embed(source="assets/close_over.gif")] //这是图片的相对地址
[Bindable]
public var NOicon:Class;

//设置不同图标
private function iconFun(item:Object):*
{
var xml:XML = item as XML;

if(xml.attribute("bool") == true)
return OKicon;
else if(xml.attribute("bool") == false)
return NOicon;
}
]]>
</mx:Script>

<mx:XMLListCollection id="datatree" >
<mx:source>
<mx:XMLList>
<node label="NO1" bool="false">
<node label="NO11" bool="false">
<node label="NO111" bool="false"/>
</node>
<node label="NO22" bool="true"/>
</node>
<node label="NO2" bool="true">
<node label="NO11" bool="false">
<node label="NO111" bool="false"/>
</node>
<node label="NO22" bool="true">
<node label="NO222" bool="false"/>
</node>
</node>
</mx:XMLList>
</mx:source>
</mx:XMLListCollection>

<mx:Tree id="tree" y="40" width="100%" height="100%" fontFamily="Arial" fontSize="12"
dataProvider="{datatree}" labelField="@label" iconFunction="iconFun" />
</mx:Application>

2/

可以复写Ｔｒｅｅ组件，在其单元格TreeItemRenderer内的commitProperties方法中进行判断然和赋值
icon.source = iconClass;
不知道可不可以。以前在ＴｉｌｅＬｉｓｔ和ＤａｔａＧｒｉｄ中用过
override protected function commitProperties():void
{
super.commitProperties();
if(super.data){
if(super.data.@label=="调度时间"){
super.removeChild(DisplayObject(icon));
var iconClass:Class = iconDesign;
icon = new iconClass();
addChild(DisplayObject(icon));
}
}

}