要执行的Flex清除功能的浏览器是由用户关闭

本文介绍了要执行的Flex清除功能的浏览器是由用户关闭的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个Flex客户端应用程序。我需要一个清理功能，在Flex中，当用户关闭浏览器中运行。我发现在网络上下面的解决方案，但它只是对我的工作中途。我怎么能解决这个问题？ 感谢您的任何答复！的

I have a Flex client application. I need a clean up function to run in Flex when the user closes the browser. I found the following solution on the net, but it only works half-way for me. How could I fix it? Thanks in advance for any responses!

自定义事件引发，但不执行。
>>事件处理程序的 CustomEvent.SEND_EVENTS 由一个伴侣EventMap定义。所有的处理程序是调用一个 HTTPServiceInvoker 。在调试控制台，我能看到的处理程序和HTTPServiceInvoker被触发，但无论是 resultHandlers 还是 faultHandlers 被称为。我知道这个事件处理程序，因为当我分派同一 CustomEvent.SEND_EVENTS 在一个按钮单击处理程序没有问题，它的行为完全如我所料）
在浏览器似乎等待清理函数来完成关闭之前。（所有的痕迹印的浏览器关机前）

CustomEvent triggered, but not executed.
>> EventHandler for CustomEvent.SEND_EVENTS is defined by a Mate EventMap. All the handler does is to call an HTTPServiceInvoker. In debug console, I'm able to see the handler and HTTPServiceInvoker being triggered, but neither the resultHandlers nor the faultHandlers were called. I know this event handler has no problem because when I dispatch the same CustomEvent.SEND_EVENTS in a button click handler, it behaves exactly as I expected)
Browser seems to wait for cleanUp function to complete before it closes. (all traces were printed before browser closes down)

我添加了以下内容里的index.template.html

I added the following into the index.template.html

window.onbeforeunload = clean_up;

function clean_up()
{
 var flex = document.${application} || window.${application};
 flex.cleanUp();
}

和使用应用程序MXML文件以下

And used the following in the application MXML file

import flash.external.ExternalInterface;

public function init():void {
ExternalInterface.addCallback("cleanUp",cleanUp);
}

public function cleanUp():void {   

   var newEvent:CustomEvent = new CustomEvent(CustomEvent.SEND_EVENTS);
   newEvent.requestObj = myFormModel;

   dispatchEvent(newEvent);

   // for testing purposes
   // to see whether the browser waits for Flex cleanup to finish before closing down   
   var i:int;
   for (i=0; i<10000; i++){
        trace(i);
   }    

}

我的设置

弹性生成3
配合MVC框架（Mate_08_9.swc）
flash播放器10
My Setup
- FlexBuilder 3
- Mate MVC Framework (Mate_08_9.swc)
- FlashPlayer 10
  推荐答案
  不幸的是，在做这样清理的功能，异步执行的没有坚实的方法。该结果 / 故障中的HTTPService的事件清理后异步发生返回方法。浏览器只能等待，直到 onbeforeunload的函数（JS * CLEAN_UP *功能）的回报。除非你调用事件。preventDefault（）从功能，页面将关闭。请注意，调用的 preventDefault（）的会导致确定/取消弹出问：
  Unfortunately, there is no solid way of doing such clean up functions that execute asynchronously. The result/fault events of the HTTPService occur asynchronously after the cleanUp method is returned. The browser waits only till the onbeforeunload function (the js *clean_up* function) returns. Unless you call event.preventDefault() from that function, the page will be closed. Note that calling preventDefault() will result in an ok/cancel popup asking:
  您确定要离开此页？
  preSS确定继续，或取消留在当前页面。
  Press OK to continue, or Cancel to stay on the current page.
  如果用户选择OK，浏览器将仍然关闭。您可以使用 event.returnValue 属性添加自定义消息，POPOP。
  If the user selects OK, the browser will be closed nevertheless. You can use the event.returnValue property to add a custom message to the popop.
```
//tested only in Firefox
window.addEventListener("beforeunload", onUnload, false);
function onUnload(e)
{
   e.returnValue = "Some text that you want inserted between " +
     "'Are you sure' and 'Press OK' lines";
   e.preventDefault();
}
```
  这篇关于要执行的Flex清除功能的浏览器是由用户关闭的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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