话不多说，请看代码：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style> *{ margin:0; padding:0; } /*最小宽度 这样图片就可以自适应居中*/ .warp{ min-width:900px; width:100%; height: 600px; margin:0 auto; } #banner{ position: relative; } ul{ position: relative; width:100%; height:600px; overflow: hidden; } ul li{ display: none; position: absolute; top:0; left: 0; width: 100%; height: 600px; text-align: center; } .cur{ position:absolute; bottom:20px; text-align: center; width: 100%; height: 40px; line-height: 40px; } .cur span{ display: inline-block; width: 20px; height: 20px; background:#000; } .cur span.active{ background:blue; } .btn{ position: absolute; top:50%; width: 50px; height: 100px; line-height: 100px; text-align: center; margin-top:-50px; color:#fff; font-size:18px; background: rgba(0,0,0,0.9) } .btnLeft{ left:0; } .btnRight{ right:0; } img{ width: 900px; height: 600px; } </style> </head> <body> <div> <div> <ul> <li>全屏渐变 图片自适应居中</li> <li>全屏渐变 图片自适应居中</li> <li>全屏渐变 图片自适应居中</li> </ul> <!-- 如果两个按钮在图片的外面 只需要把按钮移到外面然后在js里添加按钮移入清除定时器事件 --> <div><</div> <div>></div> </div> </div> <script src="https://libs.baidu.com/jquery/1.9.1/jquery.js"></script> <script> var num=0; var btnLeft=$(".btnLeft"); var btnRight=$(".btnRight"); var Id=$("#banner"); var oUl=Id.find("ul"); var oLi=oUl.find("li"); var oLiLen=oLi.length; var curHtml="<div></div>"; Id.append(curHtml); var oCur=$(".cur"); // 动态添加小圆点 for(var i=0;i<oLiLen;i++){ var curA="<span></span>" oCur.append(curA); } var oCurSpan=oCur.find("span"); var oCurS=oCur.find("span:first"); oCurS.addClass('active') // 自动轮播 var t=setInterval(function(){ num++; lunbo(); },3000); // 移动到轮播清除定时器 Id.hover(function(){ clearInterval(t) },function(){ t=setInterval(function(){ num++; lunbo(); },3000); }); // 左箭头按钮 btnLeft.on("click",function(){ num--; lunbo(); }) //右箭头按钮 btnRight.on("click",function(){ num++; lunbo(); }) function lunbo(){ if(num==oLiLen){ num=0; } oLi.eq(num).fadeIn().siblings().fadeOut(); oCurSpan.eq(num).addClass('active').siblings().removeClass('active'); } lunbo(); </script> </body> </html>