JavaScript面向对象编程_javascript技巧

//类的定义

//方法一：类的一般定义方法
function player1(_name)
{
this.name = _name;
this.say = function() {alert(this.name);};
}

var p1 = new player1('llinzzi1');
p1.say();


//方法二：prototype定义方法
var player2 = function() {}
player2.prototype = {
name:'',
say:function(){
alert(this.name);
}
}

var p2 = new player2();
p2.name = 'llinzzi2';
p2.say();


//方法三：上面的方法结构美观，便捷，但构建函数不能带参数，修改方法
var player3 = function() {
this.init.apply(this, arguments);
}
player3.prototype = {
init:function(_name){
this.name = _name;
},
say:function(){
alert(this.name);
}
}

var p3 = new player3('llinzzi3');
p3.say();

//类的继承

//方法一
var player4 = function(){
this.init.apply(this, arguments);
}
player4.prototype = new player3;
player4.prototype.shout = function(){
alert(this.name.toUpperCase());
}

var p4 = new player4('llinzzi4');
p4.shout();


//方法二 上面的方法不能采用{}的方法，修改方法
Object.extend = function(destination, source) {
for (var property in source)
destination[property] = source[property];
return destination;
};

var player5 = function(){
this.init.apply(this, arguments);
}
Object.extend(Object.extend(player5.prototype,player3.prototype),{
shout:function(){
alert(this.name.toUpperCase());
}

});

var p5 = new player5('llinzzi5');
p5.shout();




//再从prototype.js抄一端浏览器判断代码

Browser = {
IE: !!(window.attachEvent && !window.opera),
Opera: !!window.opera,
WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
Gecko: navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1,
MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
}

alert(Browser.MobileSafari);