没有ajax调用可以使用jQuery的.when吗？ [英] Is it possible to use jQuery's .when without an ajax call?

问题描述

http://jsfiddle.net/f4hmL/235/

function showData() {
    alert("boop!");
}

function method1() {
    var dfd = $.Deferred();
    setTimeout(dfd.resolve(), 10000);
    return dfd.promise();
}

function method2() {
    var dfd = $.Deferred();
    setTimeout(dfd.resolve(), 6000);
    return dfd.promise();
}

$.when(method1(), method2()).then(showData);​

我希望只有当两个延迟对象都解决后才能看到boop，但我立即看到它。是否有可能实现这一目标？ jQuery的when方法是正确使用的函数吗？

I was hoping to only see "boop" displayed when both deferred objects resolved, but I see it immediately. Is it possible to achieve this? Is jQuery's "when" method the right function to be using?

推荐答案

你没有把正确的东西传递给的setTimeout（）。这不起作用，因为您立即调用 dfd.resolve（）并将该结果传递给 setTimeout（） in这一行：

You aren't passing the right thing to setTimeout(). This won't work because you are calling dfd.resolve() immediately and passing that result to setTimeout() in this line:

setTimeout(dfd.resolve(), 10000);

相反，你需要这样的东西：

Instead, you need something like this:

setTimeout(function() {dfd.resolve()}, 10000);

在超时发生之前不会调用解析。

which will not call the resolve until the timeout fires.

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