参数错误：游戏"reset"后出现错误 #2025，可能是范围错误

Question

我的迷你游戏在舞台上有4个物体，在游戏完成后，我希望它们都从舞台上移除，让游戏重新开始。

我是这样设置的(去掉了大部分比特)

function mainGame():void {
            var theCoin:coin = new coin();
            var cupOne:cup = new cup();
            var cupTwo:cup = new cup();
            var cupThree:cup = new cup();
            stage.addChild(theCoin);
            trace(theCoin.parent);
            stage.addChild(cupOne);
            trace(cupOne.parent);
            stage.addChild(cupTwo);
            trace(cupTwo.parent);
            stage.addChild(cupThree);
            trace(cupThree.parent);

            function prepReset():void 
            {
                cupOne.removeEventListener(MouseEvent.CLICK, liftCup1);
                cupTwo.removeEventListener(MouseEvent.CLICK, liftCup2);
                cupThree.removeEventListener(MouseEvent.CLICK, liftCup3);
                stage.addChild(resetBtn);
                resetBtn.addEventListener(MouseEvent.CLICK, resetGame);
            }
            function resetGame(event:MouseEvent):void 
            {  
                stage.removeChild(cupOne);
                stage.removeChild(cupTwo);
                                    stage.removeChild(cupThree);
                letsgoagain();
            }
        } // end mainGame
        function letsgoagain():void
        {
            stage.removeChild(resetBtn);
            mainGame();
            trace("RESET")
        }

这一切都工作良好的第一次。一旦它第二次重置，我得到

Game Started
[object Stage]
[object Stage]
[object Stage]
[object Stage]
RESET
[object Stage]
[object Stage]
[object Stage]
[object Stage]
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
    at flash.display::DisplayObjectContainer/removeChild()
    at Function/coinGame/$construct/mainGame/resetGame()[*coinGame.as:147]
Cannot display source code at this location.

父级仍然是Stage，但仍然是Stage。removeChild不是正确的语法?我不明白。Stackoverflow，你能给我指出正确的方向吗?

Answer 1

下面是一个如何设置该类的示例:

public class coinGame extends MovieClip
{
    public var theCoin:coin;
    public var cupOne:cup;
    public var cupTwo:cup;
    public var cupThree:cup;
    public function coinGame():void 
    {
        initGame();
    }
    public function initGame():void
    {
        theCoin = new coin();
        cupOne = new cup();
        cupTwo = new cup();
        cupThree = new cup();
        addChild(theCoin);
        addChild(cupOne);
        addChild(cupTwo);
        addChild(cupThree);
    }
    public function prepReset():void 
    {
        cupOne.removeEventListener(MouseEvent.CLICK, liftCup1);
        cupTwo.removeEventListener(MouseEvent.CLICK, liftCup2);
        cupThree.removeEventListener(MouseEvent.CLICK, liftCup3);
        addChild(resetBtn);
        resetBtn.addEventListener(MouseEvent.CLICK, resetGame);
    }
    public function resetGame(event:MouseEvent):void 
    {  
        removeChild(cupOne);
        removeChild(cupTwo);
        removeChild(cupThree);
        letsgoagain();
    }
    function letsgoagain():void
    {
        removeChild(resetBtn);
        initGame();
    }
}

我没有声明你的resetBtn或添加事件监听器等，但这是基本的结构。

将对象的创建和添加到initGame()方法中，可以让您轻松地重新启动游戏。构造函数只执行一次，因此最好不要将可能需要多次执行的操作放在构造函数中。

另外，除非您想在每次游戏重置时创建杯子，否则您可以这样做:

    public function coinGame():void 
    {
        theCoin = new coin();
        cupOne = new cup();
        cupTwo = new cup();
        cupThree = new cup();
        initGame();
    }
    public function initGame():void
    {
        addChild(theCoin);
        addChild(cupOne);
        addChild(cupTwo);
        addChild(cupThree);
    }

这样，您就不必每次都创建这些对象的新实例，而只需根据需要在显示列表中添加/删除它们。这可能是你想要的。