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这篇文章主要介绍了JavaScript类继承及实例化的方法,较为详细的分析了javascript扩展类、实例化类及类对象与成员函数的使用技巧,需要的朋友可以参考下
本文实例讲述了JavaScript类继承及实例化的方法。分享给大家供大家参考。具体如下：
(function(){
var Class = {
//扩展类
create: function(aBaseClass, aClassDefine){
var $class = function(){
for(var member in aClassDefine){
this[member] = aClassDefine[member];
}
if('undefined'===typeof aClassDefine.initialize){
this.initialize = function(){};
}
};
if('function' ===typeof aBaseClass){
$class.prototype = new aBaseClass();
}else if('object' ===typeof aBaseClass){
$class.prototype = aBaseClass;
}
return $class;
},
//实例化类
new: function(jclass,args){
var jclass = new jclass();
if(jclass.initialize){
jclass.initialize.apply(jclass, args);
}
return jclass;
}
};
//export
window.Class = Class;
})();
示例：
//基类对象或函数
var obj = {
name: 'BaseName',
init: function(){
//...
},
//...
};
var fun = function(){
this.name = '';
var init = function(){
//.. .
};
var getName = function(){
return this.name;
},
var setName = function(name){
this.name = name;
return this;//链式操作支持
},
//...
};
//从Object继承
var class_frome_obj = Class.create(obj,{
initialize: function(){
//构造函数
},
getName: function(){
return this.name;
},
setName: function(name){
this.name = name;
return this;//链式操作支持
},
//...
});
//从Function继承
var class_frome_fun = Class.create(fun,{
initialize: function(){
//构造函数
},
//...
});
//从空对生成基类
var class_frome_base = Class.create({},{
initialize: function(){
//构造函数
},
//...
});
//实例化
var get_class_frome_obj = Class.new(class_frome_obj,[arg1,arg2,...]);
var get_class_frome_fun = Class.new(class_frome_fun,[arg1,arg2,...]);
var name1 = get_class_frome_obj.getName();
//console.log(name1);//BaseName
var name2 = get_class_frome_obj.setName('NewName').getName();
//console.log(name2);//NewName
希望本文所述对大家的javascript程序设计有所帮助。 | 
发表于 2015-7-25 15:48:18
