JavaScript类继承及实例化的方法
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(){
varClass={
//扩展类
create:function(aBaseClass,aClassDefine){
var$class=function(){
for(varmemberinaClassDefine){
this[member]=aClassDefine[member];
}
if('undefined'===typeofaClassDefine.initialize){
this.initialize=function(){};
}
};
if('function'===typeofaBaseClass){
$class.prototype=newaBaseClass();
}elseif('object'===typeofaBaseClass){
$class.prototype=aBaseClass;
}
return$class;
},
//实例化类
new:function(jclass,args){
varjclass=newjclass();
if(jclass.initialize){
jclass.initialize.apply(jclass,args);
}
returnjclass;
}
};
//export
window.Class=Class;
})();
示例：
//基类对象或函数
varobj={
name:'BaseName',
init:function(){
//...
},
//...
};
varfun=function(){
this.name='';
varinit=function(){
//...
};
vargetName=function(){
returnthis.name;
},
varsetName=function(name){
this.name=name;
returnthis;//链式操作支持
},
//...
};
//从Object继承
varclass_frome_obj=Class.create(obj,{
initialize:function(){
//构造函数
},
getName:function(){
returnthis.name;
},
setName:function(name){
this.name=name;
returnthis;//链式操作支持
},
//...
});
//从Function继承
varclass_frome_fun=Class.create(fun,{
initialize:function(){
//构造函数
},
//...
});
//从空对生成基类
varclass_frome_base=Class.create({},{
initialize:function(){
//构造函数
},
//...
});
//实例化
varget_class_frome_obj=Class.new(class_frome_obj,[arg1,arg2,...]);
varget_class_frome_fun=Class.new(class_frome_fun,[arg1,arg2,...]);
varname1=get_class_frome_obj.getName();
//console.log(name1);//BaseName
varname2=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。