Flex4.5 中的错误

近期在用Flex4.5 开发项目

 

中途使用一个<s:List>来显示每一个项的时候，采用<s:HTTPService>标签、、、

 

但是在result中触发事件时，报错如下：

TypeError: Error #1034: Type Coercion failed: cannot convert mx.utils::ObjectProxy....

 

<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/mx" xmlns:local="*"
        creationComplete="xmlReader.send()"
        width="1200" height="768" showStatusBar="false"
        xmlns:ui="ui.*">
 <fx:Declarations>
  <!-- Place non-visual elements (e.g., services, value objects) here -->
  <s:HTTPService id="xmlReader" url="projects.xml" result="xmlReader_resultHandler(event)"/>
 </fx:Declarations>
 <fx:Script>
  <![CDATA[
   import com.sap.prototyping.standalone.FileRequest;
   import com.sap.prototyping.util.NativeMenuUtil;
   
   import mx.collections.ArrayCollection;
   import mx.events.FileEvent;
   import mx.events.FlexEvent;
   import mx.rpc.events.ResultEvent;
   import mx.utils.ArrayUtil;
   
   import spark.events.IndexChangeEvent;
   
   [Bindable]
   public var projects:ArrayCollection;
   
   protected function xmlReader_resultHandler(event:ResultEvent):void
   {
    //projects = event.result as ArrayCollection;
    trace("project:"+event.result.projects.project);
    if(event.result.projects.project is ArrayCollection){
     projects = event.result.projects.project;
    }else{
     projects = new ArrayCollection(ArrayUtil.toArray(event.result.projects.project));
    }
   }
   
   protected function list1_changeHandler(event:IndexChangeEvent):void
   {
    // TODO Auto-generated method stub
    
   }
   
  ]]>
 </fx:Script>
 <s:List change="list1_changeHandler(event)" dataProvider="{projects}">
  <s:itemRenderer>
   <fx:Component>
    <s:ItemRenderer>
     <s:VGroup horizontalAlign="center">
      <s:Image source="assets/dropzone.png"/>
      <s:Label text="{data.name}"/>
     </s:VGroup>
    </s:ItemRenderer>
   </fx:Component>
  </s:itemRenderer>
 </s:List>
 
</s:WindowedApplication>

 

最后在网站http://forum.sephiroth.it/showthread.php?8834-ArrayCollection-Error 找到了解决办法。

 

如红色加粗斜体部分、、、：

 

projects = event.result.projects.project;

=============================>>

 

if(event.result.projects.project is ArrayCollection){
     projects = event.result.projects.project;
    }else{
     projects = new ArrayCollection(ArrayUtil.toArray(event.result.projects.project));
    }
 }

其中红色加粗部分之所以再用了一次<s:ItemRenderer> 标签，是因为在下面的Label要用到【data】这个系统默认的属性，不加的话，会报如下错误：Access of undefined property data。

评论

1 楼 taohaha 2014-04-29  

  感谢楼主，这个问题我弄了两天。楼主正解，非常感激啊！！！[b][/b]