一、认识面向对象
1.面向对象中的概念:
(1)一切事物皆对象
(2)对象具有封装和继承特性
(3)信息隐藏
二、JS面向对象
(function(){ var n = "yelven2" function Person(name){ var _this = {} _this._name = name; _this.sayHello = function(){ alert("PHello"+_this._name+n); } return _this; } window.Person = Person; }()); function Teacher(name){ var _this = Person(name); var superSay = _this.sayHello; _this.sayHello = function(){ superSay.call(_this); alert("THello"+_this._name); } return _this; } var t = Teacher("yeleven"); t.sayHello();
时间: 2024-10-05 02:27:20