在Flex AS3 PHP中检索服务调用的最后2个结果

Question

我是一个Flex新手，我已经搜索了StackOverflow和Google'd，但似乎无法找出这个(简单)问题与Flex/ActionScript 3异步编程。我有一个PHP服务(Zend)，它将一行插入到表中。我想做的是能够使用不同的行值连续两次调用服务，并获得服务返回的新id(主键)。然后我将新id显示为2个Alerts。

问题是，当我连续两次调用服务时，我只得到最后一次和最近一次服务调用的Alert.show()。我不知道如何访问第一个的结果。

我认识到我可以重新配置我的Flex代码和PHP服务来接受对象数组，并且只需为两者发送一个PHP服务调用并接收返回结果的数组对象，但我也试图更好地理解一般情况下AsyncToken是如何工作的以及如何访问我需要的旧结果。是{serviceResult}的每次使用。令牌覆盖我之前的结果?

<s:NavigatorContent xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
   // ...

下面是我的相关代码，我想为新用户设置2个默认文件夹"Home"one_answers"temp":

 // imports
 import mx.collections.ArrayCollection;
 import mx.controls.Alert;
 import mx.events.CloseEvent;
 import mx.events.FlexEvent;
 import mx.rpc.AsyncToken;
 import mx.rpc.IResponder;
 import mx.rpc.events.FaultEvent;
 import mx.rpc.events.ResultEvent;
 import mx.rpc.remoting.mxml.RemoteObject;
 import mx.rpc.Responder;
 import spark.events.IndexChangeEvent;
import valueObjects.Folders;

// When the user clicks "Save" button, 2 new folders are created for a new user:
protected function pendingUserSaveButton_clickHandler(event:MouseEvent):void 
{
       // Create 2 initial user folders: Home and temp-taiwan
       var t1Folders:Folders = new Folders();
   t1Folders.users_email = tempUser.email;
   t1Folders.name = t1Folders.description = "Home";
   createFoldersFunction( t1Folders ); // assume returns folder ID = 100
   var t2Folders:Folders = new Folders();
   t2Folders.users_email = tempUser.email;
   t2Folders.name = t2Folders.description = "temp";
   createFoldersFunction( t2Folders ); // assume returns folder ID = 101
}

和这里是我的事件处理程序，我想要一个警报框为每个新的ID弹出:

protected function createFoldersFunction(item:Folders):void
{
    createFoldersResult.token = foldersService.createFolders(item);
}
protected function createFoldersResult_resultHandler(event:ResultEvent):void
{
    Alert.show("Folder #" + ((event.result as int) as String) + " created");
            // Currently, I only get Alert saying "Folder #101 created".
            // I want to see 2 Alerts - one for #100 and another for #101
}

和这里是我的mx代码呼叫响应和服务:

<s:CallResponder id="createFoldersResult"
    result="createFoldersResult_resultHandler(event)"/>
<foldersservice:FoldersService id="foldersService"
    fault="Alert.show(event.fault.faultString + 'n' + event.fault.faultDetail)"
    showBusyCursor="true"/>

只有'101'(第二个服务调用的结果)触发警报。为什么会这样?

谢谢!

Answer 1

您的代码重写了createFoldersResult应该响应的令牌。正确的代码应该是:

protected function createFoldersFunction(item:Folders):void
{
    var token:AsyncToken = foldersService.createFolders(item);
    var responder:Responder = new Responder(createFoldersResult_resultHandler, someFaultHandler)
    token.addResponder(responder);
}

另一个选项是直接在mxml中设置createFolders的结果处理程序，因此您的foldersservice: foldersservice将为:

<foldersservice:FoldersService id="foldersService"
    fault="Alert.show(event.fault.faultString + 'n' + event.fault.faultDetail)"
    showBusyCursor="true">
    <mx:method name="createFolders" result="createFoldersResult_resultHandler(event)"/>
</foldersservice:FoldersService>

那么你不需要createFoldersFunction，你可以调用foldersService。直接createFolders。