AS3 反射加载类

import flash.display.Sprite;       
import flash.display.MovieClip;   
import flash.utils.getDefinitionByName;   

for (var i=1; i<=2; i++)
{
    var ClassReference:Class = getDefinitionByName("MyMC"+i) as Class;
    var instance:MovieClip = new ClassReference();
    instance.x=i*200;
    addChild(instance);
}

getDefinitionByName后面跟的就是类名，反射加载的好处可以方便加载接近命名的类，不过反射加载性能很差，一般应该只用于初始化时加载