js实现移动端轮播图
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2022-06-22 16:33:17
本文实例为大家分享了js实现移动端轮播图的具体代码，供大家参考，具体内容如下
这是结构
本文实例为大家分享了js实现移动端轮播图的具体代码，供大家参考，具体内容如下
这是结构
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no initial-scale=1.0">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<link rel="stylesheet" href="./css/jd_phnoe.css" rel="external nofollow" >
<link rel="stylesheet" href="./css/base.css" rel="external nofollow" >
<title>document</title>
<script src="./js/jd_phnoe.js"></script>
</head>
<body>
<div class="jd_layout">
<div class="jd_banner">
<ul class="jd_bannerimg clearfix">
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l1.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l2.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l3.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l4.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l5.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l6.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l7.jpg" alt="" /> </a>
</li>
<li>
<a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <img src="./uploads/l8.jpg" alt="" /> </a>
</li>
</ul>
<!-- 点标记 -->
<ul class="jd_bannerindicator clearfix">
<li></li>
<li class="active"></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</div>
</div>
</body>
</html>
这是css
/* 搜索部分 */
.jd_layout{
width: 100%;
max-width: 640px;
min-width: 320px;
height: auto;
margin: 0px auto;
background-color: #ccc;
}
/* 轮播图部分 */
.jd_banner{
width: 100%;
overflow: hidden;
position: relative;
}
.jd_bannerimg{
width: 1000%;
position: relative;
}
.jd_bannerimg > li{
width: 10%;
float: left;
}
.jd_bannerimg>li img{
width: 100%;
/*1.设置为块元素
2.可以将文本的字体大小设置为0
3.vertical-align:bottom*/
display: block;
}
/* 点标记 */
.jd_bannerindicator{
position: absolute;
left: 50%;
bottom: 5px;
transform: translatex(-50%);
}
.jd_bannerindicator li{
width: 6px;
height: 6px;
float: left;
border: 1px solid #fff;
border-radius: 50%;
/* opacity: 0.7; */
margin: 0 3px;
/* cursor: pointer; */
}
.jd_bannerindicator li:first-of-type{
margin-left: 0px;
}
.jd_bannerindicator >li.active{
background-color: #fff;
}
dase
/*公共样式*/
/*1.样式重置*/
html,body,ul,li,img,a,p,div,form,input,h3{
padding: 0;
margin: 0;
/*设置盒模型*/
box-sizing: border-box;
/*去除移动端特有的点击高亮效果*/
-webkit-tap-highlight-color: transparent;
}
body{
font-family: "微软雅黑",sans-serif;
font-size: 13px;
}
a,
a:hover{
color: #666;
text-decoration: none;
}
ul{
list-style: none;
}
input{
/*1.清除文本框获取焦点时默认的边框阴影*/
outline: none;
/*2.去除边框*/
border: none;
/*3.添加边框*/
border: 1px solid #ccc;
}
/*2.添加新的样式*/
.f_left{
float: left;
}
.f_right{
float: right;
}
.m_left10{
margin-left: 10px;
}
.m_right10{
margin-right: 10px;
}
.m_top10{
margin-top: 10px;
}
.clearfix::before,
.clearfix::after{
content: "";
display: block;
height: 0;
line-height: 0px;
clear: both;
visibility: hidden;
}
js
window.onload = function () {
banner();
}
//轮播图
function banner(){
/*1.设置修改轮播图的页面结构
* a.在开始位置添加原始的最后一张图片
* b.在结束位置添加原始的第一张图片*/
/*1.1.获取轮播图结构*/
var banner=document.queryselector(".jd_banner");
/*1.2.获取图片容器*/
var imgbox=banner.queryselector("ul:first-of-type");
//1.3 获取第一张图片
var first=imgbox.queryselector("li:first-of-type");
//1.4获取最后一张图
var last=imgbox.queryselector("li:last-of-type");
// console.log(first);
// console.log(last);
//克隆添加图片
/*1.5.在首尾插入两张图片 clonenode:复制一个dom元素*/
imgbox.appendchild(first.clonenode(true));
/*1.6insertbefore(需要插入的dom元素，位置)*/
imgbox.insertbefore(last.clonenode(true),imgbox.firstchild);
//获取对应的样式
//2.1获取li的位置
var lis=imgbox.queryselectorall("li");
/*2.2 获取li元素的数量*/
var count=lis.length;
/*2.3.获取banner的宽度*/
var bannerwidth=banner.offsetwidth;
/*2.4 设置图片盒子的宽度*/
imgbox.style.width=count*bannerwidth+"px";
/*2.5 设置每一个li(图片)元素的宽度*/
for(var i=0; i < lis.length;i++){
lis[i].style.width=bannerwidth+"px";
}
/*定义图片索引:图片已经有一个宽度的默认偏移*/
var index=1;
/*3.设置默认的偏移*/
imgbox.style.left=-bannerwidth+"px";
/*4.当屏幕变化的时候，重新计算宽度*/
window.onresize=function(){
bannerwidth=banner.offsetwidth+"px";
imgbox.style.width=count*bannerwidth+"px";
for(var i = 0; i < lis.length;i++){
lis[i].style.width=bannerwidth+"px";
}
imgbox.style.left=-index*bannerwidth+"px";
}
//自动轮播
var timerid;
var strtime=function(){
timerid=setinterval(function(){
index++;
//添加过度效果
imgbox.style.transition="left 0.5s ease-in-out"
//设置偏移量
imgbox.style.left=(-index*bannerwidth)+"px";
settimeout(function(){
//当走到最后一张时候,我就让他等于最后一张
if(index==count-1){
index=1;
// 清除过度效果
imgbox.style.transition="none";
/*偏移到指定的位置*/
imgbox.style.left=(-index*bannerwidth)+"px";
}
},500)
},1500)
}
//自动播放调用
strtime();
//实现手动轮播
var startx,movex,distancex;
/*为图片添加触摸事件--触摸开始*/
var isend = true;
imgbox.addeventlistener("touchstart",function(e){
//停止定时器
clearinterval(timerid);
//console.log(e);
startx=e.targettouches[0].clientx;
});
//为图片添加触摸过程,滑动图片
imgbox.addeventlistener("touchmove",function(e){
if(isend==true){
//console.log(123);
/*记录手指在滑动过程中的位置*/
movex=e.targettouches[0].clientx;
/*计算坐标的差异*/
distancex=movex-startx;
//清除过度效果
imgbox.style.transition="none";
//基于之前轮播图偏移的位置
imgbox.style.left=(-index*bannerwidth + distancex)+"px";
}
})
/*添加触摸结束事件*/
imgbox.addeventlistener("touchend",function(e){
//获取滑动距离,判断是否超过100px
isend=false;
if(math.abs(distancex) > 50){
//判断滑动方向
if(distancex > 0){//上一张
index--;
}else{//下一张
index++;
}
//过度效果
imgbox.style.transition="left 0.5s ease-in-out";
//偏移位置
imgbox.style.left=-index*bannerwidth+"px";
}else if(math.abs(distancex) > 0){//回弹效果
//过度效果
imgbox.style.transition="left 0.5s ease-in-out";
//偏移位置
imgbox.style.left=-index*bannerwidth+"px";
}
/*将上一次move所产生的数据重置为0*/
startx=0;
movex=0;
distancex=0;
});
/*webkittransitionend:可以监听当前元素的过渡效果执行完毕，当一个元素的过渡效果执行完毕的时候，会触发这个事件*/
imgbox.addeventlistener("webkittransitionend",function(){
console.log(index,33333);
/*如果到了最后一张(count-1)，回到索引1*/
/*如果到了第一张(0)，回到索引count-2*/
if(index==count-1){
index=1;
imgbox.style.transition="none";
imgbox.style.left=-index*bannerwidth+"px";
}else if(index==0){
index=count-2;
imgbox.style.transition="none";
imgbox.style.left=-index*bannerwidth+"px";
}
yuandian(index);
settimeout(function () {
isend=true;
clearinterval(timerid);
strtime();
},100)
});
// //圆点排他
var yuandian=function (index) {
//先找到所有的li 进行遍历移除所有样式,为自己加上样式
var lis=banner.queryselector("ul:last-of-type").queryselectorall("li");
for(var i = 0; i < lis.length; i++){
lis[i].classlist.remove("active");
}
lis[index-1].classlist.add("active");
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。