Question

我有一个奇怪的问题。我设置

时可以触发Event.COMPLETE

image.source = byteArray;

BUT

当我操作byteArray - 将其转换为Bitmap并使用image.source或image.load加载它时，位图被正确加载到Image组件中;但Event.COMPLETE永远不会触发。这可能有什么问题？我已经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!

由于 Subrat

Answer 1

所以这里的课程是SWFLoader（Image扩展SWFLoader）。如果你传入ByteArray或url而不是添加适当的监听器。你做的是给它一个Bitmap，它是一个显示对象。以下是将Bitmap加载到Image中的重要代码：

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

的ByteArray：

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);
}

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]

所以你得到了这里的要点。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。

Adobe Flex：从Bitmap加载图像时，不会触发Image的Event.COMPLETE

1 个答案: