Question

我正在制作Flash“记忆”游戏，想法发现2张相同的牌。一切都很好，只是当发现卡片时我需要删除它们。现在它一直在显示。

当我尝试： removeChild(_card.currentTarget._type);

我收到错误： C:\...\MemoryGame.as, Line 202 1119: Access of possibly undefined property currentTarget through a reference with static type Card.

以下是代码的一部分：

    for(var l:Number = 0; l < 2; l++)
    {
        _card = new Card();
        addChild(_card);
        _snow = new Snow();
        _card.setType(_snow);
        _card.x = _cardX;
        _card.y = _cardY;
        _cardX += _card.width + 50;
        _card.addEventListener(MouseEvent.CLICK, checkCards);
        _cards.push(_card);
    }

private function checkCards(event:MouseEvent):void
{

    event.currentTarget.removeEventListener(MouseEvent.CLICK, checkCards);

    if(_firstCard == undefined)
    {
        _firstCard = event.currentTarget;
    }
    else if(String(_firstCard._type) == String(event.currentTarget._type))
    {
        trace("Match");
        _message = "Match";
        message_txt.text = _message;
        _firstCard = undefined;
        _currentMatches ++;
        removeChild(_card.currentTarget._type);

你可以帮帮我吗？

修改

我使用时：removeChild(_firstCard)

我收到错误：TypeError:

Error #2007: Parameter child must be non-null. at flash.display::DisplayObjectContainer/removeChild() at MemoryGame/checkCards()[C:\Users\Rimante\Desktop\gerase\gerase\MemoryGame.as:218]`

我使用时：removeChild(event.currentTarget);

我收到错误：

C:\Users\Rimante\Desktop\gerase\gerase\MemoryGame.as, Line 217  1118: Implicit coercion of a value with static type Object to a possibly unrelated type flash.display:DisplayObject.

Answer 1

尝试

 removeChild(event.currentTarget as DisplayObject)
 removeChild(_firstCard as DisplayObject)

删除_firstCard会引发错误，因为您将var设置为undefined。除去

 _firstCard = undefined;

或将此行移到removeChild-lines下面。

如果您想要延迟，请尝试：

function removeCards(firstCard:DisplayObect, secondCard:DisplayObject):void{
    removeChild(firstCard);
    removeChild(secondCard);
}

并在您的事件监听器调用中

setTimeout(removeCards, 1000, _firstCard as DisplayObject, event.currentTarget as DisplayObject);

并删除removeChild行

Answer 2

我想你想做：

removeChild(event.currentTarget);

另外，我认为您需要这样做：

removeChild(_firstCard);

删除发现的卡片

2 个答案: