flex 中Tree的数据由数组提供

<?xml version="1.0" encoding="utf-8"?>
<s:BorderContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
??? ??? ?xmlns:s="library://ns.adobe.com/flex/spark"
??? ??? ?xmlns:mx="library://ns.adobe.com/flex/mx"
??? ??? ?xmlns:d="http://ns.adobe.com/fxg/2008/dt"
??? ??? ?creationComplete="init()"
??? ??? ?width="100%" height="100%">

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import mx.controls.*;
import mx.events.*;

import mx.collections.ArrayCollection;

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[Bindable]

public var treeData:ArrayCollection;

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<fx:Script>

<![CDATA[

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private function init():void{

?????? var ones:Array=new Array();

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?????? var one11:Object={label:"tree0",data:"11"};

?????? ones.push(one11);

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?????? var one22:Object={label:"tree1",data:"12"};

?????? ones.push(one22);

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????? var one33:Object={label:"tree2",data:"13"};

????? ones.push(one33);

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????? treeData=new ArrayCollection(ones);

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????? //展开根节点
??? ? //myTree.expandItem(treeData.getItemAt(0),true);
??? ? //设置根节点选中
??? ? //myTree.selectedIndex = 0;

}

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]]>

</fx:Script>

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<mx:Tree id="myTree"
??? ??? width="188" height="455"
??? ??? showRoot="false"
??? ??? dataProvider="{treeData}"
??? ??? labelField="label"
??? ??? click="changeEvt(event)"
??? ??? x="3" y="205">
??? </mx:Tree>

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</s:BorderContainer>