URLLoader 加载多个文件，结果顺序与调用 load() 相同 [英] URLLoader loads multi files and the result order is the same as call load()

问题描述

既然 URLLoader 是异步的，那么如何保证服务端的数据顺序和 loader.load() 调用的顺序一致?也就是说totalResults中的数据顺序和url相关内容的顺序是一样的吗?

Since URLLoader is async, how to make sure the order of data from server side is the same as the loader.load() call? In other words, the data order in totalResults is the same order of url-related content?

以下是代码片段:

1.for each(var url in urls) {
    loadData(url);
}
2.private function loadData(url:String):void {
    var urlLoader:URLLoader = new URLLoader();
    urlLoader.addEventListener(Event.COMPLETE, completeHandler);
    var request:URLRequest = new URLRequest(url);
    urlLoader.load(request);
}
3.private function completeHandler(event:Event):void {
    var loader:URLLoader = URLLoader(event.target);
    var result:Object = loader.data;
    totalResults.push(result);// suppose totalResults is Array and a property in the class.
}

推荐答案

您可以扩展 URLLoader 类功能.

You can extend URLLoader class functionality.

dynamic class DynamicURLLoader extends URLLoader { }

然后在请求之前将数据(在您的情况下可能是 index )存储在加载器对象中:

Then store data ( in your case probably index ) in loader object, before requesting:

 var urlLoader:DynamicURLLoader  = new DynamicURLLoader();
 urlLoader.index = ...

响应后，检索该数据(在您的情况下为 index ):

After response, retrieve that data ( in your case index ):

var loader:DynamicURLLoader = DynamicURLLoader(event.target);
totalResults[ loader.index ] = loader.data;

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