Flex FlashPlayer插件非调试版本不报错问题处理

问题：

FlashPlayer插件对不同的浏览器有不同的版本，从其是否支持调试功能可分为：可调试插件和不可调试插件，两者主要区别有：

1) You can connect to it with the remote debugger The (right-click) context menu will include an option to "Show Redraw Regions", which lets you verify how much of your content is being redrawn each frame.

2) The debug player will show a pop-up error message for uncaught exceptions (in the regular player they would fail silently.

3) There are a handful of AS3 commands which only work in the debug player, such as System.gc(). See the System reference.

4) Basically the debug player has a sprinkling of features to make it more suited for development, and anyone developing their own content should probably be using it.

特别注意第2点，debug player在遇见未被不做错误时会弹出错误消息框，而regular player则不会报错。鉴于此，用户在使用flex应用时，往往会碰到不可遇见的怪现象，如用户点了保存按钮没反应，点了查询按钮没反应等。事实上，用户点击保存按钮的时候，程序执行过程中出错了，但是开发人员为捕捉错误，而不可调试player却未报错。

解决：

要解决此怪象，本人认为可以有3种解决方案。

1）所有flex 的代码全部进行try catch处理，估计程序员会变疯；

2）所有用户请使用带调试的插件，估计不是用户会变疯就是支持人员会变疯；

3）进行flex全局错误处理。

很明显，进行flex全局错误处理是比较好的解决方案，但是flex全局错误处理只支持flashplayer10.1及以后的版本，SDK需要4.1版本。因此，对于哪些sdk和flashplayer如有严格要求的flex应用就爱莫能助了。下述为flex全局处理的adobe的官方文档的一个例子：

http://help.adobe.com/zh_CN/AS3LCR/Flex_4.0/flash/events/UncaughtErrorEvent.html#includeExamplesSummary

遗憾的是flex新提供的错误全局处理机制，只支持application及sub application，对于module却不支持。

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

<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 

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

xmlns:mx="library://ns.adobe.com/flex/halo"

applicationComplete="applicationCompleteHandler();">

 <fx:Script>

 <![CDATA[

 import flash.events.ErrorEvent;

 import flash.events.MouseEvent;

 import flash.events.UncaughtErrorEvent;

private function applicationCompleteHandler():void

 {

loaderInfo.uncaughtErrorEvents.addEventListener(UncaughtErrorEvent.UNCAUGHT_ERROR, uncaughtErrorHandler);

 }

private function uncaughtErrorHandler(event:UncaughtErrorEvent):void

 {

 if (event.error is Error)

 {

 var error:Error = event.error as Error;

 // do something with the error

 }

 else if (event.error is ErrorEvent)

 {

 var errorEvent:ErrorEvent = event.error as ErrorEvent;

 // do something with the error

 }

 else

 {

 // a non-Error, non-ErrorEvent type was thrown and uncaught

 }

 }

private function clickHandler(event:MouseEvent):void

 {

 throw new Error("Gak!");

 }

 ]]>

 </fx:Script>

<s:Button label="Cause Error" click="clickHandler(event);"/>

</s:WindowedApplication>