我正在尝试将我的httpservice(在AS类中定义)的结果返回到我的mxml应用程序。当我把所有东西都放在主mxml中时代码本身工作正常,但我似乎无法从我的AS类中运行它。
当我在获取httpresult的行上放置断点时(myWatchedList = new XMLListCollection(myData.movie);)我可以确认myWatchedList具有所需的值。但是,当我调用getWatchedList()方法时,myWatchedList始终为null。
我确信我错过了一些非常明显的东西......
我的AS班:
package components
{
import mx.collections.XMLListCollection;
import mx.rpc.events.ResultEvent;
import mx.rpc.http.HTTPService;
public class WatchList
{
[Bindable]
public var myToWatchList:XMLListCollection;
public var myWatchedList:XMLListCollection;
public function WatchList()
{
//httpservice for watched movies
var watchedList_service:HTTPService = new HTTPService();
watchedList_service.url= "http://*****/phpscripts/selectWatchedlist.php";
watchedList_service.showBusyCursor=true;
watchedList_service.resultFormat="e4x";
watchedList_service.method="POST";
//httpservice for not yet watched movies
var toWatchList_service:HTTPService = new HTTPService();
toWatchList_service.url= "http://*****/phpscripts/selectToWatchlist.php";
toWatchList_service.showBusyCursor=true;
toWatchList_service.resultFormat="e4x";
toWatchList_service.method="POST";
//listen for result
watchedList_service.addEventListener(ResultEvent.RESULT, watchedList_result);
toWatchList_service.addEventListener(ResultEvent.RESULT, toWatchList_result);
//send request to httpservice
toWatchList_service.send();
watchedList_service.send();
}
public function toWatchList_result(event:ResultEvent):void
{
//result is xml
var myData:XML = XML(event.result);
myWatchedList = new XMLListCollection(myData.movie);
}
public function watchedList_result(event:ResultEvent):void
{
var myData:XML = XML(event.result);
myToWatchList = new XMLListCollection(myData.movie);
}
public function getWatchedList():XMLListCollection {
return this.myWatchedList;
}
public function getToWatchList():XMLListCollection {
return this.myToWatchList;
}
}
}
mxml中的代码:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
xmlns:components="components.*"
initialize="doSend()">
<s:layout>
<s:VerticalLayout paddingBottom="20" paddingLeft="20"
paddingRight="20" paddingTop="20"/>
</s:layout>
<fx:Script>
<![CDATA[
import components.WatchList;
import mx.collections.XMLListCollection;
[Bindable]
private var myToWatchList:XMLListCollection;
private var myWatchedList:XMLListCollection;
private var watchList:components.WatchList;
protected function doSend():void
{
watchList= new components.WatchList();
//fetch the watchlists
myToWatchList = watchList.getToWatchList();
myWatchedList = watchList.getWatchedList();
//bind the watchlists to the tilelist
myToWatchList_tile.dataProvider = myToWatchList;
myWatchedList_tile.dataProvider = myWatchedList;
}
]]>
</fx:Script>
<fx:Declarations>
</fx:Declarations>
<s:Panel id="panel" width="100%" height="100%" title="Watchlist">
<s:layout>
<s:VerticalLayout paddingBottom="5" paddingLeft="20"
paddingRight="20" paddingTop="5"/>
</s:layout>
<s:Label width="20%" fontSize="17" fontWeight="bold" text="Your watched movies"/>
<mx:TileList id="myWatchedList_tile" height="360" borderVisible="false"
columnCount="6" columnWidth="200"
itemRenderer="components.TileListItemRenderer" rowCount="1" rowHeight="360"/>
<s:Label width="20%" fontSize="17" fontWeight="bold" text="Your to watch movies"/>
<mx:TileList id="myToWatchList_tile" height="360" borderVisible="false"
columnCount="6" columnWidth="200"
itemRenderer="components.TileListItemRenderer" rowCount="1" rowHeight="360" />
</s:Panel>
答案 0 :(得分:0)
首先调用构造函数来提出请求:
watchList= new components.WatchList();
然后立即调用结果:
myToWatchList = watchList.getToWatchList();
...你应该等到请求结束,例如:在获取结果时抛出一个事件,然后创建一个等待事件的处理程序