效果請見圖

(注：利用iconField只能更改葉子節點的圖標。所以這里采用iconFunction)

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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[
		[Embed(source="folder.png")]          //這是圖片的相對地址
        [Bindable]
         public var folder:Class;
            
        [Embed(source="workspace.png")]          //這是圖片的相對地址
        [Bindable]
        public var workspace:Class;
        
        private function iconFun(item:Object):*
       {
            var xml:XML= XML(item);
            if(xml.attribute("type") == "folder")
                     return folder;
            else if(xml.attribute("type") == "workspace")
                     return workspace;
   		}  
	]]>
</mx:Script>
<mx:XML id="treedata">
  <node label="ROOT">
	<node label="Inbox" type="folder">
		<node label="Marketing" type="workspace"/>
		<node label="Product Management" type="workspace"/>
		<node label="Personal" type="workspace"/>
	</node>
	<node label="Outbox" type="folder">
		<node label="Professional" type="workspace"/>
		<node label="Personal" type="workspace"/>
	</node>
	<node label="Spam" type="workspace"/>
	<node label="Sent" type="folder"/>
  </node>
 </mx:XML>
<mx:Tree width="398" height="300" x="98" y="52" showRoot="false" iconFunction="iconFun"
		    dataProvider="{treedata}" iconField="@type" labelField="@label" />
</mx:Application>
  

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簡單，但是需要的時候，還是要看看的。

利用iconFunction更改Tree圖標