Flex4为datagrid添加按钮

?

<s:DataGrid>    <s:columns>        <s:ArrayList>            <s:GridColumn dataField="ip" headerText="IP" width="15"/>            <s:GridColumn dataField="alarmInfo" headerText="告警信息"/>               <s:GridColumn headerText="操作"  width="150">                <s:itemRenderer>                    <fx:Component>                <s:GridItemRenderer>                    <s:button label="删除">                </s:GridItemRenderer>            </fx:Component>                </s:itemRenderer>            </s:GridColumn>        </s:ArrayList>    </s:columns></s:DataGrid>