公司项目经常用到轮播焦点图，于是自己写了一个纯jq形式的横向轮播焦点图，可点击小圆点或者左右按钮进行切换，属于定宽类型。改成自适应宽度的也不难，将css里面的bannerCon宽度改为百分比，再在js里面将ul和li的宽度跟随父级容器的宽度变化即可，需要用到$(window).resize，目前公司暂时没用到，就先放这个定宽的出来啦。
兼容到IE6+以上浏览器，有轮播速度和切换间隔两个参数可以改。效果图如下：
Html代码如下：
<!doctype html> <html lang="zh-CN"> <head> <meta charset="utf-8"> <title>banner图</title> <link href="css/style.css" rel="stylesheet"/> <script src="js/jquery-1.9.1.min.js"></script> <script src="js/common.js"></script> </head> <body> <div class="wrap"> <div class="banner"> <div class="bannerCon"> <ul class="imgList"> <li><a href="#"><img src="images/banner01.jpg" alt=""/></a></li> <li><a href="#"><img src="images/banner02.jpg" alt=""/></a></li> <li><a href="#"><img src="images/banner03.jpg" alt=""/></a></li> </ul> <ul class="btnList clearfix"> <li class="cur"><span></span></li> <li><span></span></li> <li><span></span></li> </ul> <span class="pre-nex prev"><</span> <span class="pre-nex next">></span> </div> </div> </div> </body> </html>
Css样式如下：
@charset "utf-8"; /* 简单reset */ body, p, ul, ol, li { margin: 0; padding: 0; } ul, ol { list-style: none; } img { border:none; } a,button{ outline: none; } .clearfix:after { visibility: hidden; display: block; font-size: 0; content: " "; clear: both; height: 0; } /* 具体样式 */ .banner { position: relative; height: 400px; overflow: hidden; } .banner .bannerCon { position: absolute; top: 0; left: 50%; width: 800px; height: 400px; margin-left: -400px; overflow: hidden; } .bannerCon .imgList { position: absolute; top: 0; left: 0; width: 99999px; height: 400px; } .bannerCon .imgList li { float: left; width: 800px; height: 400px; } .bannerCon .imgList li a { position: relative; display: block; height: 100%; } .bannerCon .imgList li img { width: 800px; height: 400px; } .bannerCon .pre-nex { display: none; position: absolute; top: 50%; width: 40px; height: 60px; margin-top: -40px; font: bold 40px/60px Simsun; color: #ccc; text-align: center; border:none; background: rgba(0,0,0,.30); filter:progid:DXImageTransform.Microsoft.Gradient(startColorStr=#4c000000, endColorStr=#4c000000); cursor: pointer; z-index: 3; } .bannerCon .pre-nex.show { display: inline-block; } .bannerCon .prev { left: 13%; } .bannerCon .next { right: 13%; } .bannerCon .btnList { position: absolute; left: 0; bottom: 20px; width: 100%; height: 12px; text-align:center; z-index: 2; _overflow: hidden; } .bannerCon .btnList li { display: inline; } .bannerCon .btnList li span { display: inline-block; width: 12px; height: 12px; margin: 0 5px; border-radius: 6px; background-color:#14829e; cursor: pointer; } .bannerCon .btnList li.cur span { background-color: #f30; }
Js代码如下：
//加载在文本读取之后的js语句 开始 ============================================================= function Scroll(obj,speed,interval){ //父级容器，轮播速度，切换间隔 $("."+obj).each(function(){ var $box = $(this), $imgUl = $box.children(".imgList"), $imgLi = $imgUl.children("li"), $btnUl = $box.children(".btnList"), $btnLi = $btnUl.children("li"), $btnPreNex = $box.children(".pre-nex"), $btnPre = $box.children(".prev"), $btnNex = $box.children(".next"), n = $imgLi.length, width = $imgLi.width(), left = parseFloat($imgUl.css("left")), k = 0, Player; $imgUl.css("width",n*width); function scroll(){ //轮播事件 $imgUl.stop().animate({left:-width},speed,function(){ k += 1; $imgUl.css("left",0); $imgUl.children("li:first").appendTo($(this)); $btnLi.removeClass('cur'); if(k >= n){ k = 0; } $btnUl.children("li").eq(k).addClass('cur'); }); } $btnLi.click(function(){ //小圆点点击事件 var index = $btnLi.index(this); $(this).addClass('cur').siblings("li").removeClass('cur'); if(index >= k){ var dif = index-k; left = -dif*width; $imgUl.stop().animate({left:left},speed,function(){ $imgUl.css("left",0); $imgUl.children("li:lt("+dif+")").appendTo($imgUl); }); } else{ var j = n-(k-index); $imgUl.css("left",(index-k)*width); $imgUl.children("li:lt("+j+")").appendTo($imgUl); $imgUl.stop().animate({left:0},speed); } k = index; }); $btnPreNex.click(function(){ //左右按钮点击事件 var index = $btnLi.index(this); if($(this).hasClass('next')){ if(!$imgUl.is(":animated")){ k += 1; $imgUl.animate({left:-width},speed,function(){ $imgUl.css("left",0); $imgUl.children("li:first").appendTo($(this)); if(k >= n){ k = 0; } $btnUl.children("li").removeClass('cur').eq(k).addClass('cur'); }); } } else { if(!$imgUl.is(":animated")){ k += -1; $imgUl.css("left",-width); $imgUl.children("li:last").prependTo($imgUl); $imgUl.stop().animate({left:0},speed); if(k < 0){ k = n-1; } $btnUl.children("li").removeClass('cur').eq(k).addClass('cur'); } } }); $box.hover( //鼠标移入、移出事件 function(){ clearInterval(Player); $btnPreNex.addClass('show'); }, function(){ Player = setInterval(function(){scroll()},interval); $btnPreNex.removeClass('show'); } ); Player = setInterval(function(){scroll()},interval); }); } $(function () { //读取轮播事件 Scroll("bannerCon",600,4000); });
注意加载一下jq库，我用的是1.9.1的，其实1.7+的都没问题的。如果觉得对你们有帮助，就给个赞哈~~~