为什么flex tree在程序中没有打开？

I have a simple flex tree, and I'd like to expand it after data load. but the tree is not expanding by expandChildrenOf method, expandItem, or openItems.

我有一个简单的flex树，我想在数据加载后扩展它。但是这个树没有通过expandChildrenOf方法，expandItem或openItems进行扩展。

I could expand tree manually, though.

不过，我可以手动扩展树。

Here is the script:

这是脚本：

private function resultHandler(event:ResultEvent):void
{
xmlTree = XML(event.result as String);
tree.dataProvider = xmlTree;
callLater(myExpandTree);
}

private function myExpandTree() : void {
    tree.expandChildrenOf(tree.root, true);
}

....

<mx:RemoteObject id="ro" destination="myList"
                 result="resultHandler(event)"
                 fault="faultHandler(event)"/>
<mx:XML id="xmlTree"/>

<mx:Tree id="tree" dataProvider="{xmlTree}"
         editable = "true"
         iconFunction="tree_iconFunc"

         labelField="@label"
         width="100%" height="100%" showRoot="false" />

1 个解决方案

#1

This is what I used to expand the tree.

这就是我用来扩展树的方法。

private function expandRootNode():void { tree.expandItem(xmlTree,true); //expand the root node }

private function expandRootNode（）：void {tree.expandItem（xmlTree，true）; //展开根节点}

#1