Question

我的问题可能是相同的，并且具有与此here相同的动机，我没有使用jQuery。我想要一个javascript解决方案。

我的对象如下所示：

function Person(name, age, weight) {
    this._name = name;
    this._weight = weight;
    this._age = age;
    this.Anatomy = {
        Weight: this._weight,
        Height: function () {
            //calculate height from age and weight
            return this._age * this._weight;

//yeah this is stupid calculation but just a demonstration
//not to be intended and here this return the Anatomy object
//but i was expecting Person Object. Could someone correct the 
//code. btw i don't like creating instance and referencing it 
//globally like in the linked post
                    }
                }
            }

Answer 1

this.Anatomy = {
          //'this' here will point to Person
    this.f = function() {
         // 'this' here will point to Anatomy.
    } 
}

内部函数this通常指向一个级别的下一个事物。解决这个问题最一致的方法是

this.Anatomy = {
    _person: this,
    Weight: this._weight,
    Height: function () {
        //calculate height from age and weight
        return _person._age * _person._weight;
    }
}

或者你也可以这样做

function Person(name, age, weight) {
    this.Anatomy = {
        weight: weight,
        height: function() { return age*weight; }
    };
}

保留此内部实例对象的类

1 个答案: