在jQuery.when()中使用有延迟的数组 [英] Using an array of deffered with jQuery.when()

问题描述

我正在使用$.when在其他一些逻辑之前运行2个函数.现在，在某些情况下，在执行相同逻辑之前，我需要运行一组不同的函数，因此我想将一组函数传递给$.when，但无法使其运行.

I'm using $.when to run 2 functions prior to some other logic. Now, in several cases I need to run a different set of functions prior to doing that same logic, so I wanted to pass an array of the functions to $.when, but couldn't make it run.

类似的东西:

function funcA(){
    console.log("funcA");
}
function funcB(){
    console.log("funcB")
}
var funcArr = [funcA, funcB];

$.when(funcArr).then(function(){
    console.log("DONE!");
});

但是这不起作用，唯一写入控制台的内容是完成！". 我阅读了以下如何使用一系列jQuery Deferreds?，但以下行为相同:

But this doesn't work and the only thing written to the console is "DONE!". I read the following How do you work with an array of jQuery Deferreds?, but the following behaves the same:

$.when.apply($, funcArr).then(function(){
    console.log("DONE!")
});

那是怎么了? 谢谢.

推荐答案

您对$.when的输入的类型不是Deferred，这是该函数的预期输入类型-

Your inputs to $.when aren't of type Deferred, which is the expected input type for the function - http://api.jquery.com/jQuery.when/

在最简单的级别上，您可以使用函数作为beforeStart构造参数来构造Deferred类型.喜欢:

At the simplest level, you could construct Deferred types with your functions as the beforeStart construction parameters. Like:

var funcArr = [$.Deferred(funcA), $.Deferred(funcB)];

这是一个有效的小提琴: http://jsfiddle.net/6MeM5/

Here's a working fiddle: http://jsfiddle.net/6MeM5/

此外:

如果您只是想执行功能数组中的每个功能，则不需要参与Deferred.只需使用$.each迭代数组即可，例如:

If you're just trying to execute each function in an array of functions, you don't need to get Deferred involved. Just iterate the array using $.each, like:

$.each(funcArr, function(){
    this();
});

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