actionscript-3 - 执行后删除实例 2

Question

使用此代码得到一个 Parameter child must be non-null 错误任何人都可以提供帮助吗？

for (i=1; i<=4; i++)
{
    this["Box" + i].addEventListener(Event.ENTER_FRAME, Move);
    this["Box" + i].addEventListener(MouseEvent.CLICK, Action);
}
function Move(e:Event):void
{
    e.target.y -=  6;
    if (e.target.y <= 56)
    {
        MovieClip(e.target).removeEventListener(Event.ENTER_FRAME, Move);
        removeChild(getChildByName(e.target.name));
        Comment.text = "MISS";
        miss +=  1;
        score +=  0;
    }
}
function Action(event:MouseEvent):void
{
    if ((event.target.hitTestObject(bts1))&&(event.target.hitTestObject(bts2))&&(event.target.hitTestObject(bts3))&&(event.target.hitTestObject(bts4)))
    {
        MovieClip(event.target).removeEventListener(MouseEvent.CLICK, Action);
        removeChild(getChildByName(event.target.name));
        Comment.text = "PERFECT";
        perfect +=  1;
        score +=  10000;
    }
    else if ((event.target.hitTestObject(bts2)&&event.target.hitTestObject(bts3)&&event.target.hitTestObject(bts4))||(event.target.hitTestObject(bts1)&&event.target.hitTestObject(bts2)&&event.target.hitTestObject(bts3)))
    {
        MovieClip(event.target).removeEventListener(MouseEvent.CLICK, Action);
        removeChild(getChildByName(event.target.name));
        Comment.text = "GREAT";
        great +=  1;
        score +=  5000;
    }
    else if ((event.target.hitTestObject(bts3)&&event.target.hitTestObject(bts4))||(event.target.hitTestObject(bts1)&&event.target.hitTestObject(bts2)))
    {
        MovieClip(event.target).removeEventListener(MouseEvent.CLICK, Action);
        removeChild(getChildByName(event.target.name));
        Comment.text = "GOOD";
        good +=  1;
        score +=  2500;
    }
    else if ((event.target.hitTestObject(bts4))||(event.target.hitTestObject(bts1)))
    {
        MovieClip(event.target).removeEventListener(MouseEvent.CLICK, Action);
        removeChild(getChildByName(event.target.name));
        Comment.text = "BOO";
        boo +=  1;
        score +=  1000;
    }
    else
    {
        MovieClip(event.target).removeEventListener(MouseEvent.CLICK, Action);
        removeChild(getChildByName(event.target.name));
        Comment.text = "MISS";
        miss +=  1;
        score +=  0;
    }
 }

顺便说一句，“bts1,2,3”是一个行影片剪辑，问题发生在鼠标单击事件上，我想要的是当我单击框时，它将对“bts”进行命中测试，并且该框将在用户之后被删除点击，如果用户没有点击，那么它会在某个点消失

Answer 1

在删除孩子之前，您必须删除所有附加到它的侦听器，ENTER_FRAME等等CLICK。只需复制并粘贴相同的行（这是一个有点不好的做法，当它被修复时，您需要在此处进行一些重构）。