javascript - 如何访问 jQuery 回调函数中的属性？

Question

var some_name =
{
    moving:false,

    show : function ()
    {
        this.moving = true;

        $('element').slideDown(5000, function ()
        {
            this.moving = false; //How to access to attribute "moving" of class some_name?
        });
    },
}

代码中的问题。

Answer 1

您可以将回调函数绑定(bind)到当前上下文:

$('element').slideDown(5000, $.proxy(function() {
    this.moving = false;
}), this); // "this" inside of the function will be this "this"

参见jQuery.proxy

---

或者你可以这样做:

this 是当前上下文，它的值取决于函数的调用方式。您可以将 this 分配给函数外部的变量，并改用此变量:

var that = this;
$('element').slideDown(5000, function() {
    that.moving = false; //use that instead of this here
});