Flex SharedObject将数据从Object转换为Custom Class Object

时间:2012-12-12 03:35:48

标签: actionscript-3 flex casting browser-cache

我只是尝试使用flex共享对象功能保存一些数据。数据已成功保存,但当我将其检索回来时,我无法将其强制转换回原始对象。例如,我正在保存我的自定义类的对象,当我检索它时,它是Object类型。虽然我在检查时调试模式,但它包含我的自定义类的所有成员及其值。但是我无法将它从Object类型转换回我的自定义类。

有人可以帮我吗?

2 个答案:

答案 0 :(得分:3)

你可以使用registerClassAlias

registerClassAlias("com.path.to.MyClass", MyClass);
myStuff = SharedObject.getLocal("myAppStuff");
myStuff.data.whatINamedIt = myClassInstance;
myStuff.flush();

现在什么时候回来......你可以说:

myStuff = SharedObject.getLocal("myAppStuff");
var mySavedClass:MyClass = myStuff.data.whatINamedIt as MyClass;

答案 1 :(得分:1)

您的自定义类必须实现IExternalizable

在获取共享对象之前,您必须使用registerClassAlias

        private var so:SharedObject;

        private function writeMyCustomClass():void
        {
            registerClassAlias("classes.MyCustomClass", MyCustomClass);
            so = SharedObject.getLocal("savedCustom");
            so.clear();

            var mycustom:MyCustomClass = new MyCustomClass;
            mycustom.name = "Raja";
            mycustom.age = 27;

            so.data.custom = getAndwriteCustomClassToByteArray(mycustom).readObject();
            so.flush();
        }

        private function getAndwriteCustomClassToByteArray(mycustom:MyCustomClass):ByteArray
        {
            var copier:ByteArray = new ByteArray();
            copier.position=0;
            copier.writeObject(mycustom);
            copier.position=0;

            return copier;
        }

        private function getMyCustomClass():void
        {
            registerClassAlias("classes.MyCustomClass", MyCustomClass);
            so = SharedObject.getLocal("savedCustom");
            var mycustom:MyCustomClass = so.data.custom;
        }





package
{
import flash.utils.IDataInput;
import flash.utils.IDataOutput;
import flash.utils.IExternalizable;
public class MyCustomClass implements IExternalizable
{
    public var name:String;
    public var age:int;

    public function MyCustomClass()
    {
    }

    public function writeExternal(output:IDataOutput):void {
        output.writeObject(this.name);
        output.writeInt(this.age);
    }
    public function readExternal(input:IDataInput):void {
        this.name=input.readObject();
        this.age=input.readInt();
    }
}

来源:www.actionscript.org