
标准用法:
function Sprite(){
//函数内容部设置属性
this.name='shimily';
}
//原型上设置方法
Sprite.prototype.show=function(){
console.log(this.name);
}
//【尽量不要在原型上面添加公共属性】
//公共的属性或常量可以在原型上面设置
Sprite.prototype.PI=3.1415926;
var s = new Sprite();
s.show();
改进用法:
改进用法一:*************************
function Sprite2(name,age){
//函数内容部设置属性
this.name=name;
this.age=age;
}
//原型上设置方法
Sprite2.prototype.show=function(){
console.log(this.name);
} var s2 = new Sprite2('shimily1314',20);
s2.show();
改进方法二:*******************
function Sprite3(options){
//函数内容部设置属性
this.name=options.name;
this.age=options.age;
}
//原型上设置方法
Sprite3.prototype.show=function(){
console.log(this.name);
}
var s3 = new Sprite3({
name:'shimilygood',
age:20
});
s3.show();
最终常用方法:***************
function Sprite4(options){
//函数内容部设置属性
this._init(options);
} Sprite4.prototype._init=function(options){
this.name=options.name;
this.age=options.age;
this.color=options.color;
}
//原型上设置方法
Sprite4.prototype.show=function(){
console.log(this.name);
} var s4 = new Sprite4({
name:'shimilygood123',
age:20
});
s4.show();
【最好、最常用】
最终【优化版】常用方法:***************
function Sprite5(options){
//函数内容部设置属性
this._init(options);
} Sprite5.prototype={
_init:function(options){ //只允许内部调用的方法【仅内部调用】
this.name=options.name;
this.age=options.age || 20;
this.color=options.color || 'red';
console.log(this.name);
},
show:function(ele){ //[可以不加参数]外部可以调用的方法不使用下划线
console.log(this.name + ele);
} };
var s5 = new Sprite5({
name:'shimilygoodabc',
age:20
});
s5.show('yang');
王伟峰,图片轮播开发案例格式*******挺好用的
function Slider(container, opts){ //属性设置
this.$outer = $(container);
this.$inner = this.$outer.children();
this.$prev = $(opts.prev);
this.$next = $(opts.next);
this.$els = this.$inner.children();
this.total = this.$els.length;
this.w = this.$els.outerWidth(true);
this.timer = null;
this.isSliding = false;
this.autoplay = opts.autoplay || false;
this.init(); //对外接口
}
var proto = Slider.prototype; //原型中封装方法
proto.init = function(){
var self = this;
var $last = this.$els.eq(this.total-1);
if(this.total<6){
$last = this.$els.clone().appendTo(this.$inner).eq(this.total-1);
this.total *= 2;
}
$last.prependTo(this.$inner);
this.$inner.css('marginLeft', -this.w);
console.log(this.$next)
this.$prev.on('click', function(){
self.prev();
})
this.$next.on('click', function(){
self.next();
})
this.$outer.on('mouseenter', function(){
clearTimeout(self.timer);
})
this.$outer.on('mouseleave', function(){
self.auto();
})
this.auto();
}
proto.prev = function(){
if(this.isSliding) return;
this.isSliding = true;
var self = this;
this.$inner.animate({
marginLeft: 0
}, 500, function(){
self.$inner.children().eq(self.total-1).prependTo(self.$inner);
self.$inner.css('marginLeft', -self.w);
self.isSliding = false;
})
}
proto.next = function(){
if(this.isSliding) return;
this.isSliding = true;
var self = this;
this.$inner.animate({
marginLeft: -this.w*2
}, 500, function(){
self.$inner.children().eq(0).appendTo(self.$inner);
self.$inner.css('marginLeft', -self.w);
self.isSliding = false;
})
}
proto.auto = function(){
if(!this.autoplay) return;
var self = this;
function delay(){
self.timer = setTimeout(function(){
self.next();
delay();
}, 5000)
}
delay();
} //实例化
new Slider('.slideOuter',{
prev: '.prev',
next: '.next',
autoplay: true
});