我正在使用Flex 4.6 AIR应用程序。我有一个磁贴列表，并且有一个图像作为itemRenderer。当我搜索图像时，数据不被过滤但是被选择了tilelist的索引（选定项），我在arrayCollection（dataProvider）中设置了一个自定义属性，然后调用了updateDisplayList，我在这个函数中启动了一个计时器。其中执行播放所选项目中的内部图像。
现在的问题是，如果我搜索该项目并单击未选择的项目，则不会停止计时器。我怎样才能做到这一点。
itemRenderer的代码在
之下<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
autoDrawBackground="true" buttonMode="true"
click="itemrenderer2_clickHandler(event)"
doubleClick="itemrenderer1_doubleClickHandler(event)" doubleClickEnabled="true"
rightClick="itemrenderer1_rightClickHandler(event)"
rollOut="itemrenderer1_rollOutHandler(event)"
rollOver="itemrenderer1_rollOverHandler(event)" useHandCursor="true">
<fx:Script>
<![CDATA[
import customs.customcomponents.LibraryReDownloadComponent;
import customs.customcomponents.VideoUploadBox;
import dbconnection.Connection;
import globalData.DataModel;
import mx.collections.ArrayCollection;
import mx.core.FlexGlobals;
import mx.core.UIComponent;
import mx.events.ItemClickEvent;
import mx.managers.PopUpManager;
import mx.utils.ObjectProxy;
import mx.utils.UIDUtil;
private var isLoaded:Boolean = false;
private var timer:Timer;
private var rollOverFlag:Boolean = false;
private var countThumb:int = 0;
private var arrThumnail:ArrayCollection;
private var loaderThumb:Loader;
private var request:URLRequest;
private var requestThumb:URLRequest;
private var loader:Loader;
private var sqlStatStatus:SQLStatement;
private var downloadVideoPath:String = "";
private var videoUrlStream:URLStream;
private var videoFileStream:FileStream;
private var uploadvidbox:VideoUploadBox = new VideoUploadBox();
private var dtStartVideo:Date;
private var videoFileName:String = "";
private var videoFile:File;
private var IsRollOver:Boolean = false;
[Bindable]
private var modellocator:DataModel=DataModel.getInstance();
private var connection:Connection = Connection.getInstance();
override public function set data(value:Object):void
{
if(value != null)
{
super.data = value;
if(timer != null)
{
timer.stop();
timer.removeEventListener(TimerEvent.TIMER, showFrame);
timer = null;
}
loaderThumb = new Loader();
rollOverFlag = false;
countThumb = 0;
if(flash.system.Capabilities.os.indexOf("Mac") > -1)
{
requestThumb = new URLRequest("file://" + data.Videothumbnail);
}
else
{
requestThumb = new URLRequest(data.Videothumbnail);
}
loaderThumb.contentLoaderInfo.addEventListener(Event.COMPLETE,onThumbComplete);
loaderThumb.load(requestThumb);
if(data.VideoBuyFlag == "yes")
{
if(data.VideoIsDeleted == "No")
{
bContain.setStyle("borderColor", "#00FF18");
bContain.alpha = 1;
}
else
{
bContain.setStyle("borderColor", "#888888");
bContain.alpha = 0.3;
}
}
else
{
if(data.VideoIsDeleted == "No")
{
bContain.setStyle("borderColor", "#C50000");
bContain.alpha = 1;
}
else
{
bContain.setStyle("borderColor", "#888888");
bContain.alpha = 0.3;
}
}
if(data.VideoStatus == "Active")
{
imgActive.source = "assets/btn_Active.jpg";
bContain.alpha = 1;
}
else
{
imgActive.source = "assets/btn_InActive.jpg";
bContain.alpha = 0.3;
}
arrThumnail = new ArrayCollection();
if(data.Videothumbdata.thumbimage != null)
{
if(data.Videothumbdata.thumbimage.source.item.length > 1)
{
for(var i:int = 0; i < data.Videothumbdata.thumbimage.source.item.length; i++)
{
arrThumnail.addItem(data.Videothumbdata.thumbimage.source.item[i]);
}
}
else
{
arrThumnail.addItem(data.Videothumbdata.thumbimage.source.item);
}
}
}
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
super.updateDisplayList(unscaledWidth, unscaledHeight);
/* trace(data.Videoname);
trace("IsRollOver : " + IsRollOver.toString());
trace("IsSearching : " + data.IsSearching.toString());
trace("rollOverFlag : " + rollOverFlag.toString()); */
if(data.IsSearching == false)
{
if(IsRollOver == false)
{
if(timer != null)
{
trace("inner");
loaderThumb = new Loader();
rollOverFlag = false;
if(flash.system.Capabilities.os.indexOf("Mac") > -1)
{
requestThumb = new URLRequest("file://" + data.Videothumbnail);
}
else
{
requestThumb = new URLRequest(data.Videothumbnail);
}
loaderThumb.contentLoaderInfo.addEventListener(Event.COMPLETE,onThumbComplete);
loaderThumb.load(requestThumb);
timer.stop();
timer.removeEventListener(TimerEvent.TIMER, showFrame);
countThumb= 0;
System.gc();
System.gc();
}
}
}
else
{
if(rollOverFlag == false)
{
rollOverFlag = true;
trace("Hi");
timer = new Timer(1000);
timer.addEventListener(TimerEvent.TIMER, showFrame);
timer.start();
}
else
{
if(timer != null)
{
trace("SecondInner");
loaderThumb = new Loader();
rollOverFlag = false;
if(flash.system.Capabilities.os.indexOf("Mac") > -1)
{
requestThumb = new URLRequest("file://" + data.Videothumbnail);
}
else
{
requestThumb = new URLRequest(data.Videothumbnail);
}
loaderThumb.contentLoaderInfo.addEventListener(Event.COMPLETE,onThumbComplete);
loaderThumb.load(requestThumb);
timer.stop();
timer.removeEventListener(TimerEvent.TIMER, showFrame);
countThumb= 0;
System.gc();
System.gc();
}
}
}
}
protected function showFrame(event:TimerEvent):void
{
var file:File;
trace("hello");
if(countThumb < arrThumnail.length)
{
if(flash.system.Capabilities.os.indexOf("Mac") > -1)
{
file = new File("file://" + arrThumnail[countThumb]);
}
else
{
file = new File(arrThumnail[countThumb]);
}
if(file.exists)
{
loader = new Loader();
if(flash.system.Capabilities.os.indexOf("Mac") > -1)
{
request=new URLRequest("file://" + arrThumnail[countThumb]);
}
else
{
request=new URLRequest(arrThumnail[countThumb]);
}
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);
loader.load(request);
if(countThumb == (arrThumnail.length - 1))
{
countThumb = 0;
}
else
{
countThumb++;
}
}
else
{
countThumb++;
}
}
else
{
countThumb = 0;
}
}
protected function itemrenderer1_rollOverHandler(event:MouseEvent):void
{
if(data.IsSearching == false)
{
rollOverFlag = true;
IsRollOver = true;
if(arrThumnail != null && arrThumnail.length > 0)
{
timer = new Timer(1000);
timer.addEventListener(TimerEvent.TIMER, showFrame);
timer.start();
}
}
}
private function onComplete(event:Event):void
{
if(rollOverFlag)
{
imgThumb.source = loader;
}
}
private function onThumbComplete(event:Event):void
{
imgThumb.source = loaderThumb;
}
protected function itemrenderer1_rollOutHandler(event:MouseEvent):void
{
if(data.IsSearching == false)
{
rollOverFlag = false;
IsRollOver = false;
imgThumb.source = loaderThumb;
if(timer != null)
{
timer.stop();
timer.removeEventListener(TimerEvent.TIMER, showFrame);
timer = null;
}
countThumb = 0;
System.gc();
System.gc();
}
}
protected function itemrenderer2_clickHandler(event:MouseEvent):void
{
for(var i:int=0; i < modellocator.libraryvideoac.length; i++)
{
modellocator.libraryvideoac[i].IsSearching = false;
}
parentDocument.parentDocument.txt_search.text = resourceManager.getString('languages','lblSearchText');
parentDocument.parentDocument.unCheckSelection();
if(data.VideoIsDeleted == "Yes")
{
var popupReDownload:LibraryReDownloadComponent = new LibraryReDownloadComponent();
popupReDownload = PopUpManager.createPopUp(UIComponent(this.parentApplication), LibraryReDownloadComponent, true) as LibraryReDownloadComponent;
popupReDownload.addEventListener("downloadMovie", redownloadMovie);
PopUpManager.centerPopUp(popupReDownload);
}
}
]]>
</fx:Script>
<fx:Declarations>
<mx:NumberFormatter id="numFormat" precision="2"/>
</fx:Declarations>
<s:BorderContainer id="bContain" left="2" top="2" width="92" height="67" backgroundAlpha="1"
backgroundColor="#000000" borderColor="#030304" borderWeight="3">
<s:Image id="imgThumb" width="86" height="61" fillMode="scale" scaleMode="stretch"/>
<s:Image id="imgActive" right="0" bottom="0" width="15" height="15" buttonMode="true"
useHandCursor="true"/>
</s:BorderContainer>
</s:ItemRenderer>
答案 0 :(得分：0)
您在代码中的不同位置进行了计时器实例化。我不能确定实际的程序流程，但也许您实例化计时器两次？在这种情况下，程序将覆盖定时器变量，并失去对第一个定时器的引用。所以，当你调用timer.stop（）时，你实际上只停止一个计时器，而另一个计时器在后台继续运行。
您没有在此处设置弱引用属性：
timer.addEventListener(TimerEvent.TIMER, showFrame);
因此，如果您丢失其引用（即使您调用System.gc（）两次:-)），也不会对计时器进行垃圾回收。检查一下这种情况，然后尝试添加一个监听器：
timer.addEventListener(TimerEvent.TIMER, showFrame, false, 0, true);