jquery制作一个简单的轮播

效果图：
演示地址：

http://ae6623.cn/demo/slider/index.html
思路：
利用css的定位属性 left 进行调整图片的显示，每次点击上一页下一页按钮的时候，-图片宽度 * index(当前li索引)即可。
代码：


<!DOCTYPE HTML>

<html>

<head>

    <!--申明当前页面的编码集-->

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

    <!--网页标题-->

    <title>slider</title>

    <!--网页关键词-->

    <meta name="keywords" content="" />

    <!--网页描述-->

    <meta name="description" content="" />

    <!--适配当前屏幕-->

    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />

    <!--禁止自动识别电话号码-->

    <meta name="format-detection" content="telephone=no" />

    <!--禁止自动识别邮箱-->

    <meta content="email=no" name="format-detection" />

    <!--iphone中safari私有meta标签,

        允许全屏模式浏览,隐藏浏览器导航栏-->

    <meta name="apple-mobile-web-app-capable" content="yes" />

    <!--iphone中safari顶端的状态条的样式black(黑色)-->

    <meta name="apple-mobile-web-app-status-bar-style" content="black">

    <style type="text/css">

        /*reset 重置*/

        body,ul,ol,p,h1,h2,h3,h4,h5,dl,dd,form,input,textarea,

        td,th,button,strong,em,select,video,canvas{margin:0;padding:0;}

        li{list-style:none;vertical-align:top;}

        table{ border-collapse:collapse;}

        textarea{resize:none;overflow:auto;}

        img{ border:none; vertical-align:middle;}

        em{ font-style:normal;}

        a{ text-decoration:none;}

        a,input{

            -webkit-appearance: none;/*屏蔽阴影*/

            -webkit-tap-highlight-color:rgba(0,0,0,0);

            /*ios android去除自带阴影的样式*/

        }

        a, img {

            /* 禁止长按链接与图片弹出菜单 */

            -webkit-touch-callout: none;

        }

        html, body {

            /* 禁止选中文本(如无文本选中需求,此为必选项) */

            -webkit-user-select: none;

            user-select: none;

        }

        /*public*/

        html {

            font-size : 20px;

        }

        @media only screen and (min-width: 401px){

            html {

                font-size: 25px !important;

            }

        }

        @media only screen and (min-width: 428px){

            html {

                font-size: 26.75px !important;

            }

        }

        @media only screen and (min-width: 481px){

            html {

                font-size: 30px !important;

            }

        }

        @media only screen and (min-width: 569px){

            html {

                font-size: 35px !important;

            }

        }

        @media only screen and (min-width: 641px){

            html {

                font-size: 40px !important;

            }

        }

        body{font-family: "Helvetica Neue", Helvetica, "STHeiTi", sans-serif;

            overflow-x:hidden; overflow-y:auto; font-size:0.7rem;

        }

        .clear{zoom:1;}

        .clear:after{content:''; display:block; clear:both;}

        .fl{float:left;}

        .fr{float:right;}

        .viewport{ max-width:640px; margin:0 auto; overflow-x:hidden;}

        #slider{width:400px;position: relative;overflow: hidden;}

        #slider-head{width:400px;}

        #silder-head>div{float: left;height: 20px;line-height: 20px;vertical-align: middle;}

        #slider-head-button{width:350px;}

        #slider-head-button span{font-size: 12px;display: block;float: left;margin:3px;}

        #slider-content ul{position:relative;height: 150px;width:2000px;}

        #slider-content li{position:relative;width:200px;height: 150px;float: left;margin-right:5px;}

        #slider-content  .li1{background-color:#3399cc;}

        #slider-content  .li2{background-color: #cc3333;}

        #slider-head-dots{ }

        #slider-head-dots li{display: inline-block; width: 10px; height: 10px; margin: 5px 0px; text-indent: -999em; border: 2px solid #fff; border-radius: 6px; cursor: pointer; opacity: .4; -webkit-transition: background .5s, opacity .5s; -moz-transition: background .5s, opacity .5s; transition: background .5s, opacity .5s; background: #000;} 

        #slider-head-dots li.active,li:hover {

            background: #000;

            opacity: 1;

        }

        </style> 

        </head>

<body>

    <div>

        <div id="main">

            <div id="slider">

                <div id="silder-head">

                    <div id="slider-head-button"><span class="l"> <a href="#" class="pri"><</a></span><span class="r"> <a href="#" class="next">></a> </span></div>

                    <div id="slider-head-dots">

                        <ol class="dots">

                            <li class="dot active">1</li>

                            <li class="dot">2</li>

                        </ol>

                    </div>

                </div>

                <div class="clear"></div>

                <div id="slider-content">

                    <ul>

                        <li class="li1">1</li>

                        <li class="li2">2</li>

                        <li class="li1">3</li>

                        <li class="li2">4</li>

                    </ul>

                </div>

            </div>

        </div>

    </div>

    <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

  <script type="text/javascript">

    $(function() {

        console.log('author:Luo Yu');

        //拿到小圆点

        var nav = $('#slider-head-dots ol').find('li');

        //轮播内容

        var content = $("#slider-content").find('ul');

       //按钮 左右剪头，我没用图片，用了大于号小于号临时将就一下

        var head_button = $("#slider-head-button").find("a");

        //第一张图片的宽度

        var imgWidth = content.find("li").eq(0).width() + 5;

        //点击了小圆点

        nav.click(function() {

            var me = $(this);

            var index = me.index();

            nav.removeClass("active");

            me.addClass("active");

            //轮播

            content.animate({

                "left": -imgWidth * 2 * index

            });

        });

        //点击了左右剪头

        head_button.click(function(){

            var me = $(this);

            var index = me.attr("class");

            if(index == "pri"){

                index = 0;

            }else{

                index = 1;

            }

            nav.removeClass("active");

            nav.eq(index).addClass("active");

            content.animate({

                "left": -imgWidth * 2 * index

            });

        });

    });

    </script>

</body>

</html>
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jquery制作一个简单的轮播

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