Flex 3 PopUpMenuButton 和 ReferenceError #1069

Question

我在 Flex 3 应用程序中有一个 PopUpMenuButton。如果有人点击下拉部分，它就可以正常工作。但是，如果他们点击主按钮部分，我就会得到 获取引用错误：错误#1069。用户消除错误后，它就会执行其应该执行的操作。

<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";
    }   

关于我做错了什么有什么想法吗？

谢谢。

-拉克斯米迪

Answer 1

在代码的 MXML 部分中，单击处理程序必须传递一个事件参数，就像 itemClick 事件处理程序一样。

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

但您的处理程序应该接收 MouseEvent 类型的事件，而不是 ItemClick。

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

天气 null 是否通过。