Flex 3 PopUpMenuButton和ReferenceError #1069

Question

我在Flex3应用程序中有一个PopUpMenuButton。如果有人点击下拉部分，它就能正常工作。但是，如果他们单击main按钮部分，我会得到ReferenceError: Error #1069。在用户消除错误之后，它就会做它应该做的事情。

<mx:PopUpMenuButton
    id="myPopUpMenuButton2"
    label="Flip"
    labelField="@label"
    dataProvider="{myList2}" 
    itemClick="popUpMenuButtonClickHandler2(event);flipperPhotoSearcher1(event.item.@neigborhoodNum, event.item.@imageSeries);"
    click="defaultpopUpMenuButtonClickHandler2()"
/>


public function popUpMenuButtonClickHandler2(event:MenuEvent):void {
        mainViewStack.selectedChild = this[event.item.@chosen];
        myPopUpMenuButton2.label = event.item.@label;
        neighborhoodPopUpMenuButton.label = "Neighborhoods";
    }  


public function defaultpopUpMenuButtonClickHandler2():void {
        mainViewStack.selectedChild = home;
        myPopUpMenuButton2.label = 'Adams Morgan';
        flipperPhotoSearcher1(2,1);
        neighborhoodPopUpMenuButton.label = "Neighborhoods";
    }   

知道我做错了什么吗？

谢谢。

-Laxmidi

Answer 1

在代码的MXML部分中，单击处理程序必须像itemClick事件处理程序一样传递事件参数。

click="defaultpopUpMenuButtonClickHandler2()"
should be...
click="defaultpopUpMenuButtonClickHandler2(event)"
or, you could do this...
click="defaultpopUpMenuButtonClickHandler2(null)"

但是您的处理程序应该以MouseEvent类型而不是ItemClick类型接收事件。

public function defaultpopUpMenuButtonClickHandler2():void {
should be...
public function defaultpopUpMenuButtonClickHandler2(event:MouseEvent):void {

是否传递了weather null。