异步获取多个json文件后触发回调 [英] Trigger callback after getting multiple json files asynchronously

问题描述

我有来自旧论坛的3个JSON文件，其中包含：成员，主题和回复。
现在我想通过javascript / jquery获取3个json文件在网站上呈现它。

I have 3 JSON files from an old forum containing: members, topics and replies. Now I want to render it on a website by getting the 3 json files via javascript/jquery.

我可以通过先获取成员来同步执行，当时返回获取主题并在返回时收到回复。但我想以异步方式进行。

I could do it synchronously by first getting members, when returned getting topics and when returned getting replies. But I want to do it asynchronously.

是否有类似$ .getJson的内容需要多个URL，然后返回结果数组？就像一个富有想象力的$ .getJson（[url1，url2，url3]，callBackFunction）

Is there anything like $.getJson that takes multiple URLs and then return an array of results? Like an imaginative $.getJson([url1,url2,url3],callBackFunction)

推荐答案

使用 jQuery.when ：

var A = $.getJSON(url1);
var B = $.getJSON(url2);
var C = $.getJSON(url3);

$.when(A,B,C).done(function(aResult, bResult, cResult){//when all request are successful
    console.log([aResult[0],bResult[0],cResult[0]]);
});

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