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我甚至不知道如何解釋這種行爲,但我會嘗試。我從需要基本身份驗證的外部URL加載圖像,因此我使用URLLoader從唯一ID加載圖像。該ID傳遞給itemrenderer,然後繼續加載圖像。但是當我滾動時,圖像自己切換。如果我負荷超過7倍的圖像或所以它開始重複圖像....ItemRenderer切換URLLoader圖片
誤差的的Youtube視頻: http://www.youtube.com/watch?v=ZYoqlS14gWQ
相關的代碼:
<s:ItemRenderer name="RandomItemRenderer" creationComplete="init();"
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="false">
<s:states>
<s:State name="normal" />
<s:State name="hovered" />
<s:State name="selected" />
</s:states>
<fx:Script>
<![CDATA[
import flash.net.URLLoader;
import flash.net.URLLoaderDataFormat;
import flash.net.URLRequest;
import flash.net.URLRequestHeader;
import flash.net.URLRequestMethod;
import mx.utils.ObjectProxy;
import customclasses.Settings;
[Bindable] private var coverArtImage:Image;
private var myCoverArtLoader:URLLoader;
[Bindable] private var coverArtSource:String;
private function init():void {
get_coverArt();
}
private function get_coverArt(): void {
if (!data.coverArt) {
set_nullCoverArt();
} else {
var requestString:String = "/rest/getCoverArt.view?v=1.5.0&c=AirSub&id=" + data.coverArt;
var requestURL:String = Settings.ServerURL + requestString;
myCoverArtLoader = new URLLoader();
var myRequest:URLRequest = new URLRequest();
var authHeader:URLRequestHeader = new URLRequestHeader();
authHeader.name = 'Authorization';
authHeader.value = 'Basic ' + Settings.EncryptedCreds();
myRequest.requestHeaders.push(authHeader);
myRequest.url = requestURL;
myRequest.method = URLRequestMethod.GET;
myCoverArtLoader.dataFormat = URLLoaderDataFormat.BINARY;
myCoverArtLoader.addEventListener(Event.COMPLETE, set_coverArt);
myCoverArtLoader.addEventListener(IOErrorEvent.IO_ERROR, set_failedCoverArt);
myCoverArtLoader.load(myRequest);
}
}
private function set_coverArt(evt:Event) : void {
coverArtImage = new Image();
coverArtImage.source = myCoverArtLoader.data;
myCoverArtLoader.removeEventListener(Event.COMPLETE, set_coverArt);
}
private function set_nullCoverArt() : void {
coverArtImage = new Image();
coverArtImage.source = "assets/nullCoverArt.jpg";
}
private function set_failedCoverArt() : void {
coverArtImage = new Image();
coverArtImage.source = "assets/nullCoverArt.jpg";
myCoverArtLoader.addEventListener(IOErrorEvent.IO_ERROR, set_nullCoverArt);
}
]]>
</fx:Script>
<s:Image source.normal="assets/coverOutline.png" source.selected="assets/coverOutlineYellow.png" source.hovered="assets/coverOutlineYellow.png"
height="226" width="226" />
<s:VGroup top="4.5" bottom="5" width="200" horizontalAlign="center" letterSpacing="10"
paddingBottom="5" paddingTop="9" verticalAlign="middle" x="13.5">
<s:Image id="ui_imgCoverArt" width="200" height="200" source="{coverArtImage.source}"/>
<s:Label text="{data.title}" width="160" styleName="RandomList" />
</s:VGroup>
丫不知道 - 如果你能提供一個簡單的例子或也許鏈接如何覆蓋真棒的數據。謝謝! –
檢查更新回答 – moropus
太棒了 - 謝謝!我今晚會嘗試。 –