Flex 本地缓存

public var user:SharedObject = SharedObject.getLocal("user");
private function setSharedObject():void{
if(this.rememberMe.selected){
user.data.firstname = this.firstName.text;
user.data.rememberMe = this.rememberMe.selected;
user.flush();
}
}
private function clearSharedObject():void{
this.rememberMe.selected = false;
user.clear();
}

<mx:Panel title="Shared Object Demo" width="350" height="200">
<mx:Form>
<mx:FormItem label="FirstName" >
<mx:TextInput id="firstName" text="{user.data.firstname}"/>
</mx:FormItem>
<mx:FormItem label="Remember Me" direction="horizontal">
<mx:CheckBox id="rememberMe" change="setSharedObject()" selected="{user.data.rememberMe}" />
</mx:FormItem>
<mx:FormItem direction="horizontal">
<mx:Button label="clear SharedObject" click="clearSharedObject()"/>
</mx:FormItem>
</mx:Form> 
</mx:Panel>