HTML
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>无缝切换轮播图</title>
<link rel="stylesheet" href="./css/slide.css">
</head>
<body>
<div class="slide">
<!-- 导航点 -->
<ul class="slide-nav">
<li class="active"></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
<!-- /导航点 -->
<!-- 轮播图 -->
<div class="slide-content">
<div class="slide-item">
<img src="./img/1.jpg" alt="图片一">
</div>
<div class="slide-item">
<img src="./img/2.jpg" alt="图片二">
</div>
<div class="slide-item">
<img src="./img/3.jpg" alt="图片三">
</div>
<div class="slide-item">
<img src="./img/4.jpg" alt="图片四">
</div>
<div class="slide-item">
<img src="./img/5.jpg" alt="图片五">
</div>
</div>
<!-- /轮播图 -->
<!-- 按钮 -->
<a href="javascript:void(0);" class="slide-btn prev"></a>
<a href="javascript:void(0);" class="slide-btn next"></a>
<!-- /按钮 -->
</div>
<script type="text/javascript" src="//cdn.bootcss.com/jquery/1.12.4/jquery.js"></script>
<script type="text/javascript" src="./js/slide.js"></script>
<script type="text/javascript">
$(function(){
$('.slide').slide();
});
</script>
</body>
</html>
CSS
*{margin: 0;padding: 0;}
li{list-style-type: none;}
.slide{
width: 640px;
height: 400px;
margin: 100px auto 0 auto;
border: 5px solid #CCC;
position: relative;
overflow: hidden;
}
/* 导航点 */
.slide .slide-nav{
position: absolute;
z-index: 2;
bottom: 10px;
right: 10px;
}
.slide .slide-nav>li{
width: 10px;
height: 10px;
border: 2px solid #CCC;
border-radius: 50%;
float: left;
margin-left: 5px;
cursor: pointer;
}
.slide .slide-nav>li.active{
background-color: #FFF;
border-color: #FFF;
}
/* #导航点 */
/* 轮播内容 */
.slide .slide-content{
position: relative;
z-index: 1;
top: 0;
width: 99999px;
height: 400px;
}
.slide .slide-content .slide-item{
float: left;
width: 640px;
height: 400px;
}
.slide .slide-content .slide-item>img{
width: 100%;
height: 100%;
}
/* #轮播内容 */
/* 按钮 */
.slide .slide-btn{
display: block;
width: 50px;
height: 100px;
position: absolute;
z-index: 2;
}
.slide .prev{
top: 0;
bottom: 0;
left: 0;
margin: auto;
background:url(../img/pre.png) no-repeat center center;
}
.slide .next{
top: 0;
bottom: 0;
right: 0;
margin: auto;
background:url(../img/next.png) no-repeat center center;
}
.slide a:hover{
background-color: rgba(0,0,0,0.5);
}
JS
$.fn.slide = function(){
var slideEle = $(this);
var slideContent = slideEle.find('.slide-content');
var slideNavLi = slideEle.find('.slide-nav li');
var slideWidth = slideEle.width(); //显示窗口宽度
var timer = null; //定时器
var time = 2000; //轮播图切换事件(毫秒)
var index = 0; //当前索引值
var oldLength = slideEle.find('.slide-item').length; //item初始长度
var length = oldLength*2; //item复制后的长度
init();
//初始化
function init(){
//将item复制一份加入到原item的后面，形成:原1、原2、原3、原4、...原末、复1、复2、复3、复4...复末,并定位到复1项
index = oldLength;
slideContent.append(slideContent.html()).css({width:slideWidth*length,left:-slideWidth*index});
//鼠标悬浮事件
slideEle.hover(function(){ //移除定时任务
clearInterval(timer);
},function(){ //添加定时任务
setTimer();
});
//按钮点击事件
slideEle.find('.prev').click(function(){
if(!slideContent.is(':animated')){
index--;
change();
}
}).end()
.find('.next').click(function(){
if(!slideContent.is(':animated')){
index++;
change();
}
});
//导航点点击事件委托
slideNavLi.click(function(event){
index = $(event.target).index()+oldLength;
change();
});
setTimer();
}
//设置定时器
function setTimer(){
timer = setInterval(function(){
index++;
change();
},time);
}
function change(){
changeSlide();
changeNav();
}
//轮播图切换
function changeSlide(){
/* if(slideContent.is(':animated')){
return;
}*/
slideContent.animate({left:-slideWidth*index},500,function(){
//原1、原2、原3、原4、...原末、复1、复2、复3、复4...复末
if(index <= 0){
//当定位到原1时，在回调函数中将slideContent瞬间定位到复1
index = oldLength;
slideContent.css({left:-slideWidth*index});
}
if(index >=length-1){
//当定位到复末时，在回调中将slideContent瞬间定位到原末
index = oldLength-1;
slideContent.css({left:-slideWidth*index});
}
});
}
//导航点切换
function changeNav(){
slideNavLi.removeClass('active').eq(index%oldLength).addClass('active');
}
}