Flex中如何将一个数组Array作为Tree的数据提供元

main.mxml

1. <?xml version="1.0" encoding="utf-8"?>
2. <mx:Applicationxmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="vertical"
4. verticalAlign="middle"
5. backgroundColor="white">
7. <mx:Script>
8. <![CDATA[
9. private function tree_labelFunc(item:Object):String {
10. var suffix:String = "";
11. if (tree.dataDescriptor.hasChildren(item)) {
12. suffix = " (" + item.children.length + ")";
13. }
14. return item.name.toUpperCase() + suffix;
15. }
16. ]]>
17. </mx:Script>
19. <mx:Arrayid="arr">
20. <mx:Objectname="One">
21. <mx:children>
22. <mx:Array>
23. <mx:Objectname="Two" />
24. <mx:Objectname="Three" />
25. <mx:Objectname="Four">
26. <mx:children>
27. <mx:Array>
28. <mx:Objectname="Five" />
29. <mx:Objectname="Six" />
30. </mx:Array>
31. </mx:children>
32. </mx:Object>
33. <mx:Objectname="Seven">
34. <mx:children>
35. <mx:Array>
36. <mx:Objectname="Eight" />
37. </mx:Array>
38. </mx:children>
39. </mx:Object>
40. <mx:Objectname="Nine" />
41. </mx:Array>
42. </mx:children>
43. </mx:Object>
44. </mx:Array>
46. <mx:Treeid="tree"
47. dataProvider="{arr}"
48. labelFunction="tree_labelFunc"
49. width="200"/>
51. </mx:Application>