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>