flash as3.0动态添加属性和方法

package
{
    import fl.controls.Button;
    import fl.controls.TextArea;

    import flash.display.Sprite;

    public class test extends Sprite
    {
        private var b1:Button;
        private var b2:Button;      
        private var b3:Button;
        private var ta:TextArea;

        public function test() {
            testAddField();
            testAddMethod();
        }

        //动态添加属性
        public  function testAddField():void{
            var obj:Object = {};
            obj.name = "hello";
            obj.value = "world";
            trace(obj.name);  //输出hello
            trace(obj.value); //输出world

        }

        //动态添加方法
        public  function testAddMethod():void{
            var obj:Object = {};
            obj.hello=function(){
                trace("hello,world");
            }
            obj.hello();
        }
    }
}

输出：

hello

world

hello,world

[SWF] C:/Documents and Settings/my/Adobe Flash Builder Beta 2/test/bin-debug/test.swf - 解压缩后为 80,089 个字节