如何从方法的函数中访问原型的父级 [英] How to access a prototype's parent this from within a method's function

问题描述

我有这个课程/功能

function Menu()
{
  this.closetimer = 0;
  this.dropdown = 0;
}

Menu.prototype.menuTimer = function()
{
  this.closetimer = setTimeout(function()
  {
    this.menuClose();
  }, this.timeout);
}

Menu.prototype.menuClose = function()
{
  if(this.dropdown) this.dropdown.css('visibility','hidden');
}

我想调用Menu类的一部分函数 menuClose()，但是我认为这段代码实际上是试图从调用 menuClose()> closetimer 对象.

I want to call the function menuClose() which is part of the Menu class, but I think this code actually tries to call menuClose() from the closetimer object.

如何从 menuTimer()中的Menu对象引用 menuClose()?

How do I reference menuClose() from the Menu object from within menuTimer()?

推荐答案

在您的 setTimeout() 回调， this 引用 window ，只需保留这样的引用即可:

In your setTimeout() callback, this refers to window, just keep a reference like this:

Menu.prototype.menuTimer = function(){
    var self = this;
    this.closetimer = setTimeout(function(){
        self.menuClose();
    }, this.timeout);
}

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