Question

我正在使用Flash Builder中的项目遇到问题。以下是我的堆栈和代码示例。有人可以告诉我我做错了吗？

感谢您的时间。

- 堆叠 -

ReferenceError：错误＃1069：在WOAPPv2上找不到属性页面4，并且没有默认值。在WOAPPv2 / dragDropHandler（）[/ Users / martinw / Documents / Adobe Flash Builder 4 / WOAPPv2 / src / WOAPPv2.mxml：165] 在flash.events::EventDispatcher/dispatchEventFunction（） at flash.events::EventDispatcher/dispatchEvent(）在mx.core :: UIComponent / dispatchEvent（）[E：\ dev \ 4.x \ frameworks \ projects \ framework \ src \ mx \ core \ UIComponent.as:12528] 在mx.managers.dragClasses :: DragProxy / _dispatchDragEvent（）[E：\ dev \ 4.x \ frameworks \ projects \ framework \ src \ mx \ managers \ dragClasses \ DragProxy.as：374] 在mx.managers.dragClasses :: DragProxy / mouseUpHandler（）[E：\ dev \ 4.x \ frameworks \ projects \ framework \ src \ mx \ managers \ dragClasses \ DragProxy.as：599]

- 代码示例 - 这有效吗

import mx.core.DragSource;
import mx.events.DragEvent;
import mx.managers.DragManager;

        private function initiateDrag(event:MouseEvent,value:String):void{

            var dragInitiator:Image= event.currentTarget as Image;   

            var dragSource:DragSource = new DragSource();
            dragSource.addData(value, 'value');
            DragManager.doDrag(dragInitiator, dragSource, event);
        } 

        private function dragEnterHandler(event:DragEvent):void {
            var dropTarget:VBox =event.currentTarget as VBox;
            if (event.dragSource.hasFormat('value')) {
                DragManager.acceptDragDrop(dropTarget);
            }
        }

private function dragDropHandler(event:DragEvent):void {
            var pageName:String = event.currentTarget.name as String;
            var value:String = event.dragSource.dataForFormat('value') as String;
            this[pageName].source = "assets/big/"+value; 


        }

<s>

<s:HGroup id="hGr"
              requestedColumnCount="2"
              variableColumnWidth="false"
              columnWidth="475"
              height="450"
              gap="100"
              clipAndEnableScrolling="true" paddingLeft="10" paddingRight="10">


        <mx:VBox name="page1"
                 backgroundColor="#EFEFF0"
                 verticalScrollPolicy="off" 
                 horizontalScrollPolicy="off"
                 horizontalAlign="center" verticalAlign="middle"
                 dragEnter="dragEnterHandler(event)"
                 dragDrop="dragDropHandler(event)"
                 width="475"
                 x="0">


            <mx:Image id="page1" showBusyCursor="true" width="713" height="692" scaleContent="true" maintainAspectRatio="true" minWidth="713" minHeight="692" scaleX="1" scaleY="1" horizontalAlign="center" verticalAlign="top"/>
        </mx:VBox>


    </s:HGroup>

它打破如果我这样做，通过在运行时创建容器和图像

<script>


   private function initVars():void {
            createSpreads();
        }


        public function createSpreads():void {

            var s:VBox = new VBox();
            s.name ="page4";

            s.setStyle("backgroundColor","#fe0000"); 
            s.verticalScrollPolicy="off";
            s.horizontalScrollPolicy="off";
            s.setStyle("horizontalAlign","center");
            s.setStyle("verticalAlign","middle");
            s.addEventListener(DragEvent.DRAG_ENTER, dragEnterHandler);
            s.addEventListener(DragEvent.DRAG_DROP, dragDropHandler);
            s.width= 475;
            s.setStyle("x","0");
            hGr.addElement(s);

            hGrCol4.text = "Vboxname: "+s.name+"VboxID: "+s.id;

            var page3:Image = new Image();
            page3.id ="page4";

            page3.showBusyCursor = true;
            page3.width = 713;
            page3.height = 692
            page3.scaleContent = true;
            page3.maintainAspectRatio = true;
            page3.minWidth = 713;
            page3.minHeight = 692;
            page3.scaleX = 1;
            page3.scaleY = 1;
            page3.source = "assets/big/IMG_7112.jpg";
            page3.setStyle("backgroundColor","#ffffff");
            page3.setStyle("horizontalAlign","center");
            page3.setStyle("verticalAlign","top");
            s.addElement(page3);

            hGrCol3.text = "Imagename: "+page3.name+"ImageID: "+page3.id;
        }


import mx.core.DragSource;
import mx.events.DragEvent;
import mx.managers.DragManager;

        private function initiateDrag(event:MouseEvent,value:String):void{

            var dragInitiator:Image= event.currentTarget as Image;   

            var dragSource:DragSource = new DragSource();
            dragSource.addData(value, 'value');
            DragManager.doDrag(dragInitiator, dragSource, event);
        } 

        private function dragEnterHandler(event:DragEvent):void {
            var dropTarget:VBox =event.currentTarget as VBox;
            if (event.dragSource.hasFormat('value')) {
                DragManager.acceptDragDrop(dropTarget);
            }
        }

private function dragDropHandler(event:DragEvent):void {
            var pageName:String = event.currentTarget.name as String;
            var value:String = event.dragSource.dataForFormat('value') as String;
            this[pageName].source = "assets/big/"+value; 

        }


</script>

<s>

<s:HGroup id="hGr"
              requestedColumnCount="2"
              variableColumnWidth="false"
              columnWidth="475"
              height="450"
              gap="100"
              clipAndEnableScrolling="true" paddingLeft="10" paddingRight="10">

    </s:HGroup>

</s>

上面没有HGroup中的容器返回'在WOAPPv2上找不到的属性page4并且没有默认值' - 我的最终结果应该是这个

page4.source =“assets / big / imagename.jpg”;

我很难过。我正在重新思考它，可能只是创建vbox，然后设置触发器来创建图像并填充在sameDragDropHandler中。想法？

以下是解决方案 - 再次 - 感谢alxx。现在我需要开始向其他人提供我的知识。

public function dragDropHandler(event:DragEvent):void {

        // Retrieve the Image Name from Drop
        var value:String = event.dragSource.dataForFormat('value') as String;

                    //
        event.currentTarget.getChildAt(0).source = "assets/big/"+value;

        }

Answer 1

...继续在这里进行正确的格式化问题专栏：

var value:String = event.dragSource.dataForFormat('value') as String;
this[pageName].source = "assets/big/"+value;

我的目标是添加vbox和与之共享名称的图像子项一个id并使用该事件来抓住 currenttarget名称是图像控制

不确定我是否理解正确。如果event.currentTarget是您需要的Image，您可以将其强制转换为Image。或者您需要在某处找到另一个图像（一个在Repeater中生成）？

<强>更新

“我正在尝试使用VBox的名称作为字符串，用于点符号来引用其中的图像”

DisplayObjects的名称只是标签，而不是引用。如果您认为可以使用JS DOM中的名称遍历对象层次结构，那么不，它在Flash中以其他方式完成。您可以使用event.currentTarget将引用提供给VBox - 它的名称（String）更有用。您可以使用getChildAt在其中获取Image。

错误＃1069：找不到属性，没有默认值

1 个答案: