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所以基本上我有一个名为 Jug 的 MovieClip，当点击鸡蛋并将其拖到 Jug 时，我希望它消失，然后在它第一次开始的地方重新添加自己。除此之外，我希望一个变量的值加 1。

我已经尝试过一段时间了，但我无法弄清楚，因为当我删除孩子时它会出错。这是代码：

var eggClickOffset:Point = null;
var egg:Egg = new Egg();
egg.x = 290;
egg.y = 330;
addChild(egg);
var eggAmount:TextField = new TextField();
eggAmount.defaultTextFormat = textFormat;
eggAmount.x = 250;
eggAmount.y = 60;
eggAmount.height = 18;
eggAmount.width = 100;
eggAmount.border = true;
eggAmount.text = "Incorrect Amount";
eggAmount.background = true;
eggAmount.backgroundColor = 0xff0000;
stage.focus = eggAmount;
addChild(eggAmount);
var eggs:int;
eggs = 0;

//Egg Event listeners:
egg.addEventListener(Event.ENTER_FRAME, eggAmountCounter);
egg.addEventListener(MouseEvent.MOUSE_DOWN, startEggDrag);
egg.addEventListener(MouseEvent.MOUSE_UP, stopEggDrag);
egg.addEventListener(Event.ENTER_FRAME, dragEgg);
egg.addEventListener(Event.ENTER_FRAME, checkEggCollision);

//starting egg drag:
function startEggDrag(event:MouseEvent):void
{
    eggClickOffset = new Point(event.localX,event.localY);
}

//Stopping the egg drag:
function stopEggDrag(event:MouseEvent):void
{
    eggClickOffset = null;
}

//Egg Dragging:
function dragEgg(event:Event):void
{
    if (eggClickOffset != null)
    {// must be dragging
        egg.x = mouseX - eggClickOffset.x;
        egg.y = mouseY - eggClickOffset.y;
    }
}

//When egg hits jug:
function checkEggCollision(event:Event):void
{
    if (jug.hitTestObject(egg))
    {
            eggs + 1;
            egg.removeEventListener(MouseEvent.MOUSE_DOWN, startEggDrag);
            egg.removeEventListener(Event.ENTER_FRAME, dragEgg);
            removeChild(egg);
            addChild(egg);
            egg.x = 300;
            egg.y = 300;
    }
}

//How many eggs:
function eggAmountCounter(event:Event):void {
    if(eggs == 3){
        eggAmount.text = "Corrent Amount";
    }
}
4

2 回答 2

2

因此，就工具包重新绘制自身所要做的事情而言，从容器中添加和删除内容实际上是相当昂贵的。并且通常会遇到这样的问题，因为它不能像宣传的那样工作。所以我给你的建议是，当你想控制可见性时，永远不要添加/删除组件。只需将它们标记为可见=false/true，并选择性地记住使用 includeInLayout=true/false。由于您有电影剪辑 visible=true/false 应该足够好。

如果您只想让鸡蛋从其原始位置重新开始，只需直接修改其 x,y 位置即可。我将创建一个简单的方法，它接收一个鸡蛋并设置初始状态的所有属性。在您的 stopEggDrag 方法中，只需调用该函数，传递屏幕上正在吸毒的鸡蛋。中提琴它弹回到原来的位置。

这里的诀窍是，如果您从不移除对象，则不必解决移除问题。

于 2012-03-15T18:34:22.007 回答
1

抱歉，removeChild 没有错误，但我暗示不能再移动鸡蛋了，因为：

egg.removeEventListener(MouseEvent.MOUSE_DOWN, startEggDrag);

顺便说一句，我确定在这种情况下您不需要 3x Event.ENTER_FRAME。

我可以建议你不同的方法吗？也许你可以尝试更多这样的东西：

var eggStartPos:Point;
egg.addEventListener(MouseEvent.MOUSE_DOWN, startEggDrag);
egg.addEventListener(MouseEvent.MOUSE_UP, stopEggDrag);

//starting egg drag:
function startEggDrag(event:MouseEvent):void
{
    eggStartPos = new Point(egg.x, egg.y);
    egg.addEventListener(Event.ENTER_FRAME, handle_enterFrame);
}

//Stopping the egg drag:
function stopEggDrag(event:MouseEvent):void
{
    egg.removeEventListener(Event.ENTER_FRAME, handle_enterFrame);
    eggStartPos = null;
}

//Handle egg moving and hittest on enter frame
function handle_enterFrame(event:Event):void
{
    egg.x = mouseX;
    egg.y = mouseY;

    if( collisionWithJug(egg) )
    {
        egg.removeEventListener(Event.ENTER_FRAME, handle_enterFrame);
        collisionOccur();
    }
}

function collisionWithJug(target:DisplayObject):Boolean
{
    if (jug.hitTestObject(target))
        return true;
    else
        return false;
}

//Got collision
function collisionOccur():void
{
    eggs += 1;
    egg.x = eggStartPos.x;
    egg.y = eggStartPos.y;

    eggAmountCounter();
}


//How many eggs:
function eggAmountCounter():void
{
    if(eggs == 3)
    {
        eggAmount.text = "Corrent Amount";
    }
}
于 2012-03-15T23:53:26.053 回答