flex module 弹出窗问题 .

代码：

<?xml version="1.0" encoding="utf-8"?>

<mx:Module xmlns:fx="http://ns.adobe.com/mxml/2009"

                   xmlns:s="library://ns.adobe.com/flex/spark"

                   xmlns:mx="library://ns.adobe.com/flex/mx" layout="absolute" width="400" height="300">

        <fx:Declarations>

                <!-- 将非可视元素（例如服务、值对象）放在此处 -->

        </fx:Declarations>

        <fx:Script>

                <!--[CDATA[

                        import mx.controls.Alert;

                        private function init():void

                        {

                                Alert.show(this.parentApplication.test,"你",Alert.OK,this);

                        }

                ]]-->

        </fx:Script>

        <s:Button x="60" y="48" label="按钮" click="init();"/>

</mx:Module>

<?xml version="1.0" encoding="utf-8"?> <mx:Module xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" layout="absolute" width="400" height="300"> <fx:Declarations> <!-- 将非可视元素（例如服务、值对象）放在此处 --> </fx:Declarations> <fx:Script> <!--[CDATA[ import mx.controls.Alert; private function init():void { Alert.show(this.parentApplication.test,"你",Alert.OK,this); } ]]--> </fx:Script> <s:Button x="60" y="48" label="按钮" click="init();"/> </mx:Module>

 

出错信息：

TypeError: Error #1009: 无法访问空对象引用的属性或方法。

        at mx.managers::PopUpManagerImpl/http://www.adobe.com/2006/flex/mx/internal::createModalWindow()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as:686]

        at mx.managers::PopUpManagerImpl/addPopUp()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as:401]

        at mx.managers::PopUpManager$/addPopUp()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManager.as:193]

        at mx.controls::Alert$/show()[E:/dev/4.x/frameworks/projects/framework/src/mx/controls/Alert.as:618]

        at com.pilihou.modules::Test/init()[E:/study/TryModule/src/com/pilihou/modules/Test.mxml:13]

        at com.pilihou.modules::Test/___Test_Button1_click()[E:/study/TryModule/src/com/pilihou/modules/Test.mxml:17]

TypeError: Error #1009: 无法访问空对象引用的属性或方法。 at mx.managers::PopUpManagerImpl/http://www.adobe.com/2006/flex/mx/internal::createModalWindow()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as:686] at mx.managers::PopUpManagerImpl/addPopUp()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as:401] at mx.managers::PopUpManager$/addPopUp()[E:/dev/4.x/frameworks/projects/framework/src/mx/managers/PopUpManager.as:193] at mx.controls::Alert$/show()[E:/dev/4.x/frameworks/projects/framework/src/mx/controls/Alert.as:618] at com.pilihou.modules::Test/init()[E:/study/TryModule/src/com/pilihou/modules/Test.mxml:13] at com.pilihou.modules::Test/___Test_Button1_click()[E:/study/TryModule/src/com/pilihou/modules/Test.mxml:17]

 

 

 

错误修改方案：

Module域

 

 

 

通常将模块载入一个子域，那么模块里面的类定义都不是application域的。比如第一个模块载入了类PopUpManager，那么整合Application中，它就成了PopUpManager的拥有者，因为像这种manager都是单例的，如果另外一个模块稍后要使用这个PopUpManager，就会引发运行时异常。

 

解决办法就是确保这些managers，比如PopUpManager and DragManager或者其他一些共享的服务 是在application中定义的，这样就能确保所有模块都能够使用。在main Application中：

 

 

 

 

Java代码  

import mx.managers.PopUpManager;

import mx.managers.DragManager;

private var popUpManager:PopUpManager;
private var dragManager:DragManager;