1、错误描述
TypeError: Error #1009: 无法访问空对象引用的属性或方法。at FirstMap/search_clickHandler()[E:\Flash Builder\Map\src\FirstMap.mxml:17]at FirstMap/__search_click()[E:\Flash Builder\Map\src\FirstMap.mxml:30]
2、错误原因
<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" xmlns:chart="chart.*"><s:layout><s:BasicLayout/></s:layout><fx:Script><![CDATA[import mx.controls.Alert;protected function search_clickHandler(event:MouseEvent):void{var teacher:Teacher = new Teacher();var workId:String = teacher.workId.label;Alert.show(workId);}]]></fx:Script><fx:Declarations><!-- 将非可视元素（例如服务、值对象）放在此处 --></fx:Declarations><mx:HBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="20" paddingTop="10"><s:Panel width="50%" height="100%"><s:Button id="search" label="查询" click="search_clickHandler(event)" width="100%" height="100%" fontSize="320"/></s:Panel><chart:Teacher width="50%" height="100%"/></mx:HBox></s:Application>
3、解决办法
