开发过程中需要用到图片轮播的插件，在网上找了几个插件之后还是决定自己码一个，比较简洁的功能，以后说不定还会有用。
ps：
功能比较简单，整个框并不能根据图片的大小自动调节，这里所用的图片是1170*500的，如果需要改成其他大小的图片，自行修改.pic-list下img的宽度。
.pic-list中的宽度为整个横幅的宽度，如果需要轮播的图片数量很多，.pic-list的宽度应大于数量*单张宽度，
html
<div> <!--第一张图片为最后一张，用来做轮播连接使用，所以一开始显示的第一章，应是第二张图片，这里图片的宽度为1170px，所以一开始left为-1170px，同理最后一张图也为第一张图。--> <div> <img src="https://www.jb51.net/static/img/4.jpg" alt=""> <img src="https://www.jb51.net/static/img/1.jpg" alt=""> <img src="https://www.jb51.net/static/img/2.jpg" alt=""> <img src="https://www.jb51.net/static/img/3.jpg" alt=""> <img src="https://www.jb51.net/static/img/4.jpg" alt=""> <img src="https://www.jb51.net/static/img/1.jpg" alt=""> </div> <div> <!-- 确保span的数量跟img数量一样多，不包括第一张img和最后一张img--> <span></span> <span></span> <span></span> <span></span> </div> <a href="javascript:;"><</a> <a href="javascript:;">></a> </div>
css
.banner{ width: 100%; height: 500px; overflow: hidden; position: relative; } .banner a{ text-decoration: none; } .banner .pic-list{ width: 10000px; height: 500px; position: absolute; z-index: 1; } .banner .pic-list img{ width: 1170px; float: left; } #buttons{ position: absolute; z-index: 2; height: 10px; bottom: 20px; left: 550px; } #buttons span{ cursor: pointer; float: left; border: 1px solid #fff; width: 10px; height: 10px; border-radius: 50%; background: #333; margin-right: 5px; } #buttons .on{ background: orange; } .arrow{ cursor: pointer; line-height: 36px; text-align: center; font-size: 20px; font-weight: bold; width: 40px; height: 40px; position: absolute; z-index: 2; top: 200px; background: rgba(0,0,0,0.5); color: #fff; display: none; } .banner:hover .arrow{display: block;} #prev{ left: 20px; } #next{ right:20px; }
js
$(document).ready(function(){ var picNum = 4;//图片数量，根据实际修改 var picWidth = 1170;//图片的宽度，根据实际修改 var picMaxWidth = -1 * picNum * picWidth; var currentPic = 1; var next = $('#next'); var prev = $('#prev'); var flag = false; prev.on('click',function(){ if(!flag){ calPx(1170); currentPic--; if (currentPic < 1) { currentPic = picNum; } $('#buttons span').eq(currentPic-1).addClass('on').siblings().removeClass('on'); } }); next.on('click',function(){ if(!flag){ calPx(-1170); currentPic++; if (currentPic > picNum) { currentPic = 1; } $('#buttons span').eq(currentPic-1).addClass('on').siblings().removeClass('on'); } }); $('.banner').on('mouseover',function(){ stop(); }).on('mouseout',function(){ play(); }) function nextClick(){ next.click(); } function play(){ setInt = setInterval(nextClick,2000); } function stop(){ clearInterval(setInt); } function calPx(leftPx){ flag = true; var left = parseInt($('.pic-list').css('left')); var newLeft = left+leftPx; var time = 300; var interval = 10; var speed = leftPx/(time/interval); function go(){ var left = parseInt($('.pic-list').css('left')); if((speed < 0 && left > newLeft) || (speed > 0 && left < newLeft)){ $('.pic-list').css('left', (left + speed) + 'px'); setTimeout(go,interval); }else{ flag = false; if( newLeft > -1170){ newLeft = picMaxWidth; }else if (newLeft < picMaxWidth ) { newLeft = -1170; } $('.pic-list').css('left',newLeft + 'px'); } } go(); } play(); });