【转】Flex中使用Shared Object

Flex中的ShareObject类似于传统的cookie,但又具有传统cookies所不具有的优点:

1.默认情况下,不会过期
2.默认情况下,每个ShareObject的大小限制为100KB;
3.可以存储简单数据类型 :String,Array,Data等;
4.存储于程序制定的位置[在User的Home Directory中];
5.从不在客户端与服务器间传递

1.创建一个Shared Object

public var mySO:SharedObject;

2.指定位置:

mySO = SharedObject.getLocal("mydata");

3.保存数据

mySO.data.visitDate = new Date();
mySO.flush();

 

最后的完整代码如下：

 

<?xml version="1.0" encoding="utf-8"?><!-- lsos/WelcomeMessage.mxml --><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" initialize="initApp()"><mx:Script><!--[CDATA[ public var mySO:SharedObject; [Bindable] public var welcomeMessage:String; public function initApp():void { mySO = SharedObject.getLocal("mydata"); if (mySO.data.visitDate==null) { welcomeMessage = "欢迎第一次访问!" } else { welcomeMessage = "您上次访问的时间是： " + getVisitDate(); } } private function getVisitDate():Date { return mySO.data.visitDate; } private function storeDate():void { mySO.data.visitDate = new Date(); mySO.flush(); } private function deleteLSO():void { mySO.clear(); }]]--></mx:Script><mx:Panel title="共享对象示例" width="90%" height="90%"horizontalAlign="center"verticalAlign="middle"> <mx:Label id="label1" text="{welcomeMessage}"/> <mx:Button label="记录" click="storeDate()"/> <mx:Button label="删除纪录" click="deleteLSO()"/></mx:Panel></mx:Application>