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我有一个奇怪的问题。当我设置时,我可以让 Event.COMPLETE 触发

image.source = byteArray;

当我操作 byteArray - 将其转换为 Bitmap 并使用 image.source 或 image.load 加载它时,位图会正确加载到 Image 组件中;但是 Event.COMPLETE 永远不会触发。这里可能有什么问题?我也添加了一个完整的事件列表!我的来源如下:

                var bmp:Bitmap = scaleBitmapData(bitmapData,280,220);
                imgPreview.addEventListener(Event.COMPLETE,onPreviewImageCompleted); // never fires
                imgPreview.visible = false;
                imgPreview.load(bmp); // does not work with .source either; image is displayed but Event.Complete never fires!

谢谢 Subrat

4

1 回答 1

2

所以这里使用的类是 SWFLoader(图像扩展 SWFLoader)。如果您传入 ByteArray 或 url,则它会添加适当的侦听器。你所做的是给它一个位图,它是一个显示对象。这是将位图加载到图像中的重要代码:

 else if (classOrString is DisplayObject)
 {
     contentHolder = child = DisplayObject(classOrString);
     addChild(child);
     contentLoaded();
 }

字节数组:

else if (byteArray)
{
    loader = new FlexLoader();
    contentHolder = child = loader;
    addChild(child);

    loader.contentLoaderInfo.addEventListener(
        Event.COMPLETE, contentLoaderInfo_completeEventHandler);
    loader.contentLoaderInfo.addEventListener(
        Event.INIT, contentLoaderInfo_initEventHandler);
    loader.contentLoaderInfo.addEventListener(
        IOErrorEvent.IO_ERROR, contentLoaderInfo_ioErrorEventHandler);
    loader.contentLoaderInfo.addEventListener(
        Event.UNLOAD, contentLoaderInfo_unloadEventHandler);

    // if loaderContext null, it will use default, which is AppDomain
    // of child of Loader's context
    loader.loadBytes(byteArray, loaderContext);
}

一个网址:

else if (url)
{
    // Create an instance of the Flash Player Loader class to do all the work
    loader = new FlexLoader();
    contentHolder = child = loader;

    // addChild needs to be called before load()
    addChild(loader);

    // Forward the events from the Flash Loader to anyone
    // who has registered as an event listener on this Loader.
    loader.contentLoaderInfo.addEventListener(
        Event.COMPLETE, contentLoaderInfo_completeEventHandler);
    loader.contentLoaderInfo.addEventListener(
        HTTPStatusEvent.HTTP_STATUS, contentLoaderInfo_httpStatusEventHandler);
    loader.contentLoaderInfo.addEventListener(
        Event.INIT, contentLoaderInfo_initEventHandler);
    loader.contentLoaderInfo.addEventListener(
        IOErrorEvent.IO_ERROR, contentLoaderInfo_ioErrorEventHandler);
    loader.contentLoaderInfo.addEventListener(
        Event.OPEN, contentLoaderInfo_openEventHandler);
    loader.contentLoaderInfo.addEventListener(
        ProgressEvent.PROGRESS, contentLoaderInfo_progressEventHandler);
    loader.contentLoaderInfo.addEventListener(
        SecurityErrorEvent.SECURITY_ERROR, contentLoaderInfo_securityErrorEventHandler);
    loader.contentLoaderInfo.addEventListener(
        Event.UNLOAD, contentLoaderInfo_unloadEventHandler); 
...[this goes on for awhile]

所以你在这里得到了要点。不要将其转换为位图,您将获得完整的事件。您还可以将 ADDED_TO_STAGE 添加到您的位图中。

于 2010-01-12T04:33:28.007 回答