获取对象的所有属性名称

发布于 2024-12-27 12:01:06 字数 347 浏览 3 评论 0原文

假设我有一个如下所示的类：

public class MyClass
{
    public var attribute1;
    public var attribute2;
}

并且我想将 attribute1 和 attribute2 作为字符串获取。我尝试了这个：

var test:MyClass = new MyClass();

for (var key:String in test)  
{
    trace(test[key]); 
}

但它不起作用，它永远不会进入循环。我怎样才能做我想做的事？

谢谢

原文

Let's say I have a class which looks like this :

public class MyClass
{
    public var attribute1;
    public var attribute2;
}

and I'd like to get attribute1 and attribute2 as strings. I tried this :

var test:MyClass = new MyClass();

for (var key:String in test)  
{
    trace(test[key]); 
}

but it does not work, it never goes in the loop. How can I do what I want to do ?

Thanks

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可是我不能没有你 2025-01-03 12:01:06

for..in 循环仅枚举动态添加的属性。声明的变量和类的方法不会在 for..in 循环中枚举。这意味着 ActionScript API 中的大多数类不会在 for..in 循环中显示任何属性。

如需解决方案，请阅读：

http://livedocs.adobe。 com/flex/3/html/help.html?content=usingas_8.html

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呆° 2025-01-03 12:01:06

您需要使用 AS 反射/内省。
本机方法是使用describeType函数，如下所示：（

public function getDetails():void { 
        var classInfo:XML = describeType(button1);

        // List the class name.
        ta1.text = "Class " + [email protected]() + "\n";

        // List the object's variables, their values, and their types.
        for each (var v:XML in classInfo..variable) {
            ta1.text += "Variable " + v.@name + "=" + button1[v.@name] + 
                " (" + v.@type + ")\n";
        }
    }

来自flex文档：http://livedocs.adobe.com/flex/3/html/help.html?content=usingas_8.html）

我不确定，但我认为 mx.utils.ObjectUtil 类可以使就更简单了。而且它仍然是原生方式。

另一种选择是使用库来使其更容易。
看这个： http://www.as3commons.org/as3-commons-reflect /简介.html

You'll need to use AS reflection/introspection.
The native way is using describeType function, like this:

public function getDetails():void { 
        var classInfo:XML = describeType(button1);

        // List the class name.
        ta1.text = "Class " + [email protected]() + "\n";

        // List the object's variables, their values, and their types.
        for each (var v:XML in classInfo..variable) {
            ta1.text += "Variable " + v.@name + "=" + button1[v.@name] + 
                " (" + v.@type + ")\n";
        }
    }

(from flex doc: http://livedocs.adobe.com/flex/3/html/help.html?content=usingas_8.html)

I'm not sure but I think the class mx.utils.ObjectUtil can make it simpler. And it's still native way.

Another option is using a library to make it easier.
Look this one: http://www.as3commons.org/as3-commons-reflect/introduction.html

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