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我确定这可能是我很愚蠢,但我想确认这个问题。我正在构建一个 Windows 8 应用程序并从 mysql 服务器加载数据,但我似乎无法解决这个问题。从一些阅读中我猜问题是代码在 json 请求正确之前正在执行,有没有办法解决它。return 在那里,因为它在一个函数中,该函数返回数据然后显示它。“SampleItems[0]”显示完美,但 json 中的内容不会,但控制台日志显示它正在从服务器获取数据。提前感谢您的帮助!

    var sampleItems = [];
    sampleItems[0] = { group: sampleGroups[count], title: "New Image", subtitle: "", description: "", content: "", backgroundImage: "/images/add.png" };

        //this code calls to our cloud based service which gets the data which is needed and returns it in a JSON object back for this to handle
        $.getJSON('http://pumpstationstudios.com/tumapics/services/getimages.php', function (data) {
            var service_url = 'http://pumpstationstudios.com/tumapics/';
            var count = 1;


            images = data.items;
            $.each(images, function (index, image) {
                image.image = service_url + image.image;
                sampleItems[count] = { group: sampleGroups[count], title: "Hello", subtitle: "", description: "", content: "", backgroundImage: image.image };
                count++;
            });
        });

    return sampleItems;
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1 回答 1

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碰巧的是,几个小时前我回答了一个类似的问题javascript code execution and ajax async

本质上,发生的事情是

$.getJSON('http://.../getimages.php', function(data) {
// process data
});

// this runs *before* "process data"
return sampleItems;

sampleItems这意味着,在它被getJSON回调函数填充之前,你 return 。

要解决这个问题,你必须在回调函数中做你的处理。

于 2013-02-01T11:09:07.487 回答