Flash 多URL加载程序

我正在用URLLoader加载多个xml文件

for (var i=0;i<xmlCount;i++) {
     loadXML(xmlFiles[i], i);
}

public function loadXML(req:String=null, _id:Number=0):void {
     var loader:URLLoader = new URLLoader();
     loader.addEventListener(ProgressEvent.PROGRESS, 
             function a(e:ProgressEvent) {XMLLoadProgress(e, _id);});
     loader.addEventListener(Event.COMPLETE, XMLLoadFinished);
     loader.load(new URLRequest(req));

}

private function XMLLoadProgress(e:ProgressEvent=null, _id:Number=0):void {
     dispatchEvent(new LoadingEvent(Model.LOADING_PROGRESS, _id, (e.bytesLoaded/e.bytesTotal)*100));
}

public function SequenceLoader extends URLLoader {
    private var index:int;

    public function SequenceLoader(index:int) {
        this.index = index;
    }
}

问题是，我认为在完成所有加载之后，加载进度会被调度，并且每个xml都是逐个加载的，而不是异步加载的

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我怎样才能使它异步加载，并使它为每个进度标记调用进度事件。

我猜这只会在通过快速连接查看时发生。尝试使用慢速连接进行查看。Charles Proxy可以人为地降低连接速度。

您可以自定义URL加载程序

for (var i=0;i<xmlCount;i++) {
     loadXML(xmlFiles[i], i);
}

public function loadXML(req:String=null, _id:Number=0):void {
     var loader:URLLoader = new URLLoader();
     loader.addEventListener(ProgressEvent.PROGRESS, 
             function a(e:ProgressEvent) {XMLLoadProgress(e, _id);});
     loader.addEventListener(Event.COMPLETE, XMLLoadFinished);
     loader.load(new URLRequest(req));

}

private function XMLLoadProgress(e:ProgressEvent=null, _id:Number=0):void {
     dispatchEvent(new LoadingEvent(Model.LOADING_PROGRESS, _id, (e.bytesLoaded/e.bytesTotal)*100));
}

public function SequenceLoader extends URLLoader {
    private var index:int;

    public function SequenceLoader(index:int) {
        this.index = index;
    }
}

然后在每个loadXML中，标记加载程序：

public function loadXML(req:String=null, _id:Number=0):void {
     var loader:SequenceLoader = new SequenceLoader(_id);
     loader.addEventListener(ProgressEvent.PROGRESS, 
             function a(e:ProgressEvent) {XMLLoadProgress(e);});
     loader.addEventListener(Event.COMPLETE, XMLLoadFinished);
     loader.load(new URLRequest(req));
}

private function XMLLoadProgress(e:ProgressEvent=null):void {
   var loader:SequenceLoader  = e.target as SequenceLoader;
   var loaderIndex:int = loader.index;
  //do other stuff
}

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尝试了模拟下载，但没有更改。