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我有一个包含一堆组件的组件，如果您单击并拖动这些组件，它们就会亮起。如果您单击并拖动这些相同的组件，它们就会恢复到正常设置。（同样，当它们被单击和未单击时，百分比值被链接以显示在组件的右侧）

现在我正在尝试创建一个“重置”按钮，将百分比设置回零并取消突出显示以前选择的所有部分。但是我在重置按钮底部的函数 (resetGVHD) 中收到“错误 #1009 无法访问空对象引用的属性或方法”。

（另外， - showCaption 是我用来使其突出显示的功能。hideCaption 是用于取消突出显示的功能。）

任何帮助将不胜感激！谢谢！

这是我的代码：

    public var holdingPiece:Boolean = false;
    public var holdingSelectedPiece:Boolean = false;
    [Bindable]
    public var numberBodyButtonSelected:Number = 0;


    protected function pieMouseDownHandler(event:MouseEvent):void
    {
        var bodyButton:BodyButton= event.currentTarget as BodyButton;
        if( bodyButton.selected ){

            holdingSelectedPiece = true;
            holdingPiece = false;

            bodyButton.hideCaption();
            if (bodyButton.includedinBody){
                numberBodyButtonSelected -= bodyButton.percentageValue;
                }

            }else{

                 holdingSelectedPiece = false;
                 holdingPiece = true;

                 bodyButton.showCaption();
                 if (bodyButton.includedinBody){

            numberBodyButtonSelected+=  bodyButton.percentageValue;
                }

            }

        stage.addEventListener( MouseEvent.MOUSE_UP, releasePiece );

        }

        protected function pieRollOver(event:MouseEvent):void
        {

            var myPie:BodyButton = event.currentTarget as BodyButton;

            if( holdingPiece ){

                if( !myPie.selected ){

                    myPie.showCaption();
                    if (myPie.includedinBody){
                        numberBodyButtonSelected+= myPie.percentageValue;
                    }
                }

            }else if( holdingSelectedPiece ){

                if( myPie.selected ) {

                    myPie.hideCaption();
                    if (myPie.includedinBody){
                numberBodyButtonSelected-= myPie.percentageValue;
                    }
                }

            }

        }


        protected function releasePiece( event:MouseEvent ):void
        {

        stage.removeEventListener( MouseEvent.MOUSE_UP, releasePiece );

            holdingPiece = false;
            holdingSelectedPiece = false;

        }

        public var bodyButton:BodyButton;
        protected function resetGVHD( event:MouseEvent ):void{

            numberBodyButtonSelected=0; 

            bodyButton.hideCaption();







        }
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1 回答 1

1

你正在寻找这样的东西：

public var holdingPiece:Boolean = false;
public var holdingSelectedPiece:Boolean = false;
[Bindable]
public var numberBodyButtonSelected:Number = 0;

private var selectedButtons:Array = [];

protected function pieMouseDownHandler(event:MouseEvent):void
{
    var bodyButton:BodyButton = event.currentTarget as BodyButton;
    if( bodyButton.selected ){
        holdingSelectedPiece = true;
        holdingPiece = false;
        bodyButton.hideCaption();
        if (bodyButton.includedinBody){
            numberBodyButtonSelected -= bodyButton.percentageValue;
        }
    }else{
        holdingSelectedPiece = false;
        holdingPiece = true;
        bodyButton.showCaption();
        if (bodyButton.includedinBody){
            selectedButtons.push( bodyButton ); // this might go outside the if (bodyButton.includedinBody) condition
            numberBodyButtonSelected+=  bodyButton.percentageValue;
        }
    }
    stage.addEventListener( MouseEvent.MOUSE_UP, releasePiece );
}

protected function pieRollOver(event:MouseEvent):void
{
    var myPie:BodyButton = event.currentTarget as BodyButton;
    if( holdingPiece ){
        if( !myPie.selected ){
            myPie.showCaption();
            if (myPie.includedinBody){
                selectedButtons.push( bodyButton ); // this might go outside the if (myPie.includedinBody) condition
                numberBodyButtonSelected+= myPie.percentageValue;
            }
        }
    }else if( holdingSelectedPiece ){
        if( myPie.selected ) {
            myPie.hideCaption();
            if (myPie.includedinBody){
                numberBodyButtonSelected-= myPie.percentageValue;
            }
        }
    }
}

protected function releasePiece( event:MouseEvent ):void{
    stage.removeEventListener( MouseEvent.MOUSE_UP, releasePiece );
    holdingPiece = false;
    holdingSelectedPiece = false;
}

protected function resetGVHD( event:MouseEvent ):void{
    numberBodyButtonSelected=0;
    for (var i:int = 0; i < selectedButtons.length; i++) {
        BodyButton(selectedButtons[i]).hideCaption();
    }
    selectedButtons = [];
}

现在 resetGVHD 函数将在数组中的所有按钮上调用 hideCaption 函数......但我不确定它是否会工作，缺少太多代码。

于 2012-11-23T18:48:08.740 回答