ActionScript初学者,了解每个人

Question

为什么这个:

    for each (var dieListener:Object in dieListeners)
    {
        var f:Function = (dieListener as Function);
        f();
    }

..如果不行,如果这样:

    for (var i:int=0; i<dieListeners.length; i++)
    {
        var f:Function = (dieListeners.getItemAt(i) as Function);
        f();
    }

..作品!？

(第一个根本不进入for循环,但第二个进入!)

Answer 1

ArrayList不支持每个.尝试使用ArrayCollection.