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124 lines
3.6 KiB
124 lines
3.6 KiB
/**
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* 面相对象辅助类，可实现类的创建，继承，方法重写
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*
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<pre>
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//-------------------------
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// JS类的创建,继承
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//-------------------------
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// 例子1:-------------------------
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// 创建一个父类
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var Person = Class.create({
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// 构造函数
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init:function(option){
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this.name = option.name;
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}
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,getName:function() {
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return this.name;
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}
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});
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// 声明类实例
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var Jim = new Person({name:'Jim'});
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console.log('Jim name:' + Jim.getName())
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//例子2:-------------------------
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// 创建一个类,继承Person类，并重写getName
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var Man = Class.create({
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init:function(option) {
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this._super(option);// 调用父类构造函数
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this.age = option.age;
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}
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// 重写父类方法
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,getName:function() {
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// 调用父类的getName()
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var name = this._super();
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return '我重写了getName方法：{'+name+'}';
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}
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},Person);
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var man = new Man({name:'Tom',age:22});
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console.log('man name:' + man.getName())
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console.log('Jim instanceof Person: ' + (Jim instanceof Person));
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console.log('man instanceof Person: ' + (man instanceof Person));
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</pre>
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*
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*/
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exports.Class = (function () {
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// ------Class Creation------
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var initializing = false,
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fnTest = /xyz/.test(function () {
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xyz;
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}) ? /\b_super\b/ : /.*/;
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// The base Class implementation (does nothing)
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this.Class = function () {
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};
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// Create a new Class that inherits from this class
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Class.extend = function (prop) {
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var _super = this.prototype;
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// Instantiate a base class (but only create the instance,
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// don't run the init constructor)
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initializing = true;
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var prototype = new this();
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initializing = false;
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// Copy the properties over onto the new prototype
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for (var name in prop) {
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// Check if we're overwriting an existing function
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prototype[name] = typeof prop[name] == 'function' && typeof _super[name] == 'function' && fnTest.test(prop[name]) ? (function (name, fn) {
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return function () {
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var tmp = this._super;
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// Add a new ._super() method that is the same method
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// but on the super-class
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this._super = _super[name];
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// The method only need to be bound temporarily, so we
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// remove it when we're done executing
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var ret = fn.apply(this, arguments);
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this._super = tmp;
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return ret;
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};
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})(name, prop[name]) : prop[name];
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}
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// The dummy class constructor
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function Class() {
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// All construction is actually done in the init method
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if (!initializing && this.init) this.init.apply(this, arguments);
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}
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// Populate our constructed prototype object
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Class.prototype = prototype;
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// Enforce the constructor to be what we expect
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Class.prototype.constructor = Class;
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// And make this class extendable
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Class.extend = arguments.callee;
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return Class;
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};// ------Class Creation end------
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return {
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/**
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* 创建一个类
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* @param option 类方法,json数据
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* @param parentClass 父类
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*/
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create: function (option, parentClass) {
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if (!parentClass) {
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parentClass = Class;
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}
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return parentClass.extend(option);
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}
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};
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})();
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