法一:(直接使用openItems) <?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="https://www.adobe.com/2006/mxml" layout="vertical" initialize="initTree()" viewSourceURL="srcview/index.html"> <mx:Script> <!--[CDATA[ [Bindable] public var open:Object=new Object(); [Bindable] public var refreshData:Boolean=false; [Bindable] public var switchObj:Object=new Object(); [Bindable] public var firstObj:Object=new Object(); [Bindable] public var firstObj1:Object=new Object(); [Bindable] public var firstObj2:Object=new Object(); [Bindable] public var firstObj3:Object=new Object(); [Bindable] public var provider:String="firstObj"; private function initTree():void { firstObj=new Object(); firstObj.label="Foods"; firstObj.children=new Array(); firstObj1.label="Fruits"; firstObj1.children=new Array(); firstObj2.label="Oranges"; firstObj1.children[0]=firstObj2; firstObj.children[0]=firstObj1; } public function changeProvider():void { open=SampleTree.openItems; refreshData=true; if (provider == "firstObj") { firstObj3.label="XXXX"; firstObj.children[1]=firstObj3; switchObj=firstObj; provider="switchObj"; SampleTree.dataProvider=switchObj; } else { firstObj3.label="YYYY"; firstObj.children[1]=firstObj3; provider="firstObj"; SampleTree.dataProvider=firstObj; } renderTree(); } public function renderTree():void { if (refreshData) { SampleTree.invalidateList(); refreshData=false; SampleTree.openItems=open; SampleTree.validateNow(); } } ]]--> </mx:Script> <mx:Tree id="SampleTree" width="250" dataProvider="{firstObj}" labelField="label"/> <mx:Button label="Change Data Provider" click="changeProvider()"/></mx:Application><?xml version="1.0" encodi 你的当前访问异常,请进行认证后继续阅读剩余内容。 提交