是DataGrid的某数字内容列可编辑，并且以NumericStepper组件改变数值。

itemEditor 和 editorDataField 属性学习
示例：

代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2008/05/12/using-a-numericstepper-control-as-an-item-editor-for-a-datagrid-control-in-flex/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white" >

     < mx:ArrayCollection  id ="arrColl" >
         < mx:source >
             < mx:Array >
                 < mx:Object  label ="Student A"  score ="8"   />
                 < mx:Object  label ="Student B"  score ="4"   />
                 < mx:Object  label ="Student C"  score ="7"   />
                 < mx:Object  label ="Student D"  score ="8"   />
                 < mx:Object  label ="Student E"  score ="2"   />
                 < mx:Object  label ="Student F"  score ="6"   />
                 < mx:Object  label ="Student G"  score ="7"   />
                 < mx:Object  label ="Student H"  score ="7"   />
                 < mx:Object  label ="Student I"  score ="9"   />
                 < mx:Object  label ="Student J"  score ="8"   />
                 < mx:Object  label ="Student K"  score ="4"   />
                 < mx:Object  label ="Student L"  score ="7"   />
             </ mx:Array >
         </ mx:source >
     </ mx:ArrayCollection >

     < mx:DataGrid  id ="dataGrid"
            dataProvider =" {arrColl} "
            editable ="true"
            rowCount ="8" >
         < mx:columns >
             < mx:DataGridColumn  dataField ="label"
                    editable ="false"   />
             < mx:DataGridColumn  dataField ="score"
                    editable ="true"
                    itemEditor ="mx.controls.NumericStepper"
                    editorDataField ="value"   />
         </ mx:columns >
     </ mx:DataGrid >

</ mx:Application >