jQuery实现轮播图及其原理详解

所属分类：网络编程 / JavaScript 阅读数： 2006

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本文实例为大家分享了jQuery实现轮播图及其原理的具体代码，供大家参考，具体内容如下

<!DOCTYPE html>
<html>

<head>
 <meta charset="utf-8" name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
 <title>JQuery轮播图</title>
 <style>
 *{
 padding:0;
 margin:0;
 }
 .container{
 width:600px;
 height:400px;
 overflow: hidden;
 position:relative;
 margin:0 auto;
 }
 .list{
 width:3000px;
 height:400px;
 position:absolute;

 }
 .list>img{
 float:left;
 width:600px;
 height:400px;
 }
 .pointer{
 position:absolute;
 width:100px;
 bottom:20px;
 left:250px;
 }
 .pointer>span{
 cursor:pointer;
 display:inline-block;
 width:10px;
 height:10px;
 background: #7b7d80;
 border-radius:50%;
 border:1px solid #fff;
 }
 .pointer .on{
 background: #28a4c9;
 }
 .arrow{
 position:absolute;
 text-decoration:none;
 width:40px;
 height:40px;
 background: #727d8f;
 color:#fff;
 font-weight: bold;
 line-height:40px;
 text-align:center;
 top:180px;
 display:none;
 }
 .arrow:hover{
 background: #0f0f0f;
 }
 .left{
 left:0;
 }
 .right{
 right:0;
 }
 .container:hover .arrow{
 display:block;
 }
 </style>
</head>

<body>
 <div class="container">
 <div class="list" style="left:0px;">
 <!--<img src="../static/image/photo1.jpg" alt="5"/>-->
 <img src="../static/image/banner.jpg" alt="1"/>
 <img src="../static/image/slide1.jpg" alt="2"/>
 <img src="../static/image/slide1.jpg" alt="3"/>
 <img src="../static/image/slide1.jpg" alt="4"/>
 <img src="../static/image/photo1.jpg" alt="5"/>
 <!--<img src="../static/image/banner.jpg" alt="1"/>-->
 </div>
 <div class="pointer">
 <span index="1" class="on"></span>
 <span index="2"></span>
 <span index="3"></span>
 <span index="4"></span>
 <span index="5"></span>
 </div>
 <a href="#" rel="external nofollow" rel="external nofollow" class="arrow left">&gt;</a>
 <a href="#" rel="external nofollow" rel="external nofollow" class="arrow right">&lt;</a>
 </div>

 <script src="../static/js/jquery-3.2.1.min.js"></script>
 <script>
 var imgCount = 5;
 var index = 1;
 var intervalId;
 var buttonSpan = $('.pointer')[0].children;//htmlCollection 集合
 //自动轮播功能 使用定时器
 autoNextPage();
 function autoNextPage(){
 intervalId = setInterval(function(){
 nextPage(true);
 },3000);
 }
 //当鼠标移入 停止轮播
 $('.container').mouseover(function(){
 console.log('hah');
 clearInterval(intervalId);
 });
 // 当鼠标移出，开始轮播
 $('.container').mouseout(function(){
 autoNextPage();
 });
 //点击下一页 上一页的功能
 $('.left').click(function(){
 nextPage(true);
 });
 $('.right').click(function(){
 nextPage(false);
 });
 //小圆点的相应功能 事件委托
 clickButtons();
 function clickButtons(){
 var length = buttonSpan.length;
 for(var i=0;i<length;i++){
 buttonSpan[i].onclick = function(){
 $(buttonSpan[index-1]).removeClass('on');
 if($(this).attr('index')==1){
 index = 5;
 }else{
 index = $(this).attr('index')-1;
 }
 nextPage(true);

 };
 }
 }
 function nextPage(next){
 var targetLeft = 0;
 //当前的圆点去掉on样式
 $(buttonSpan[index-1]).removeClass('on');
 if(next){//往后走
 if(index == 5){//到最后一张，直接跳到第一张
 targetLeft = 0;
 index = 1;
 }else{
 index++;
 targetLeft = -600*(index-1);
 }

 }else{//往前走
 if(index == 1){//在第一张，直接跳到第五张
 index = 5;
 targetLeft = -600*(imgCount-1);
 }else{
 index--;
 targetLeft = -600*(index-1);
 }

 }
 $('.list').animate({left:targetLeft+'px'});
 //更新后的圆点加上样式
 $(buttonSpan[index-1]).addClass('on');


 }


 </script>
</body>

</html>

效果图：