Javascript伪类,jQuery事件处理程序和'this'

Question

我有一个很大的Javascript项目,我正在尝试重构为伪类:

jsFiddle:http://jsfiddle.net/waitinforatrain/7T42w/

var MyNameSpace = {}

MyNameSpace.MyClass = function() {
    this.doSomething = function () {
        return "hello";
    }

    this.doSomething2 = function() {
        var x = this.doSomething() + " world";
        alert(x);
    }

    this.doSomething2(); //Works fine

    $("#mydiv").click ( this.doSomething2 ); //Doesn't work
}

var class = new MyNameSpace.MyClass();

click事件导致错误的原因是this引用该#mydiv元素.

我应该如何设计上面的内容,以便我可以访问被点击但也可以调用的元素doSomething()？

Answer 1

您需要缓存上下文引用并将调用包装在闭包中:

var MyNameSpace = {}

MyNameSpace.MyClass = function() {
    var context = this;

    context.doSomething = function () {
        return "hello";
    }

    context.doSomething2 = function() {
        var x = context.doSomething() + " world";
        alert(x);
    }

    // You can do this:
    context.doSomething2();

    // Or this:
    $("#mydiv").click(function(e) {
        context.doSomething2();
    });
}