Javascript闭包和'this' [英] Javascript Closures and 'this'

问题描述

我有一个问题，我创建的对象看起来像这样：

I have a problem with an object I have created that looks something like this:

var myObject = {

    AddChildRowEvents: function(row, p2) {
        if(document.attachEvent) {
            row.attachEvent('onclick', function(){this.DoSomething();});
        } else {
            row.addEventListener('click', function(){this.DoSomething();}, false);
        }
    },

    DoSomething: function() {
        this.SomethingElse(); //<-- Error here, object 'this' does not support this method.
    }
}

问题是当我在DoSomething '

The problem is that when I am inside the 'DoSomething' function, 'this' does not refer to 'myObject' what am I doing wrong?

推荐答案

当函数被调用时， this指的是行。如果你想有对象，你可以这样做：
]

WHen the function is called, "this" refers to row. If you want to have the object, you can do it something like this: ]

AddChildRowEvents: function(row, p2) {
    var theObj = this;
    if(document.attachEvent) {
         row.attachEvent('onclick', function(){theObj.DoSomething();});
    } else {
         row.addEventListener('click', function(){theObj.DoSomething();}, false);
    }
},

当函数被调用时，定义函数时范围内的变量obj。

When the function is called, it has access to the variable theOBj which was in scope when the function was defined.

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