代码：
<?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;
//设置不同图表
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>
原文地址：http://oliwen.blog.163.com/blog/static/38057532200821234231321/
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