【jQuery】全功能轮播图的实现（本文结尾也有javascript版）
轮播图
- 图片自动切换（定时器）；
- 鼠标悬停在图片上图片不切换（清除定时器）
- 鼠标悬停在按钮上时显示对应的图片（鼠标悬停事件）
- 鼠标悬停在图片上是现实左右箭头
- 点击左键切换到上一张图片，但图片为第一张时，点击切换到最后一张图片
- 点击右键切换到下一张图片，但图片为最后一张时，点击切换到第一张图片
jquery版本3.4.1
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="css/reset.css" />
<style>
.big{
position: relative;
width: 450px;
height: 270px;
}
#ulimg{
width: 450px;
height: 270px;
overflow: hidden;
}
#ulimg li{float: left;}
#ulimg ul{
width: 500%;
height: 270px;
display: block;
clear: both;
}
#arrows{
position: absolute;
top:90px;
z-index: 5;
width: 100%;
}
.arrow{
width: 30px;
height: 60px;
background-color: #191E2B;
font-size: 25px;
text-align: center;
line-height: 60px;
border-radius: 10px;
color: #FFFFFF;
float: left;
}
#rarrow{
float: right;
}
.big #arrows{
position: absolute;
z-index: -1;
transition: z-index 1s;
opacity: 1;
cursor: pointer;
}
.btn{
width: 20px;
height: 20px;
background-color: whitesmoke;
font-size: 18px;
text-align: center;
float: left;
margin: 10px;
border-radius: 5px;
}
#btns{
position: absolute;
z-index: 5;
top: 220px;
left: 220px;
cursor: pointer;
}
#btns .btn2{
background: orange;
}
</style>
</head>
<body>
<div class="big">
<div id="ulimg">
<ul>
<li class="now"><img src="img/01.jpg" alt=""/></li>
<li><img src="img/02.jpg" alt=""/></li>
<li><img src="img/03.jpg" alt=""/></li>
<li><img src="img/04.jpg" alt=""/></li>
<li><img src="img/05.jpg" alt=""/></li>
</ul>
</div>
<div id="arrows">
<div class="arrow"><</div>
<div class="arrow" id="rarrow">></div>
</div>
<div id="btns">
<div class="btn btn2">1</div>
<div class="btn">2</div>
<div class="btn">3</div>
<div class="btn">4</div>
<div class="btn">5</div>
</div>
</div>
<script type="text/javascript" src="js/jquery-3.4.1.min.js" ></script>
<script>
var timer=setInterval(change,3000);
var index=1;
function change(){
index++;
if(index>=6){
index=1;
}
$(".btn").removeClass("btn2");
$(".btn").eq(index-1).addClass("btn2");
$("#ulimg ul").animate({
"marginLeft":"-450px"
},1000,function(){
$("#ulimg li:eq(0)").appendTo($(this));
$(this).css("marginLeft",0);
})
}
function lchange(){
$(".btn").removeClass("btn2");
index--;
if(index<=0){
index=5;
}
$(".btn").eq(index-1).addClass("btn2");
$("#ulimg li:eq(4)").prependTo($("#ulimg ul"));
}
function rchange(){
$(".btn").removeClass("btn2");
index++;
if(index>=6){
index=1;
}
$(".btn").eq(index-1).addClass("btn2");
$("#ulimg li:eq(0)").appendTo($("#ulimg ul"));
}
$(".arrow:eq(0)").click(function(){
lchange();
});
$(".arrow:eq(1)").click(function(){
rchange();
});
$(".big").mouseover(function(){
clearInterval(timer);
$("#arrows").css("zIndex",3);
})
$(".big").mouseout(function(){
clearInterval(timer);
timer=setInterval(change,3000);
$("#arrows").css("zIndex",-1);
})
$(".btn").click(function(){
$(".btn").removeClass("btn2");
$(this).addClass("btn2");
var now=$(this).html();
// console.log(now);
// console.log(index);
var btw=now-index;
if(btw<0){
btw=Math.abs(btw);
for(let i=0;i<btw;i++){
lchange();
}
}else if(btw>0){
for(let i=0;i<btw;i++){
rchange();
}
}else{
}
})
</script>
</body>
</html>
javascript版本
html+css
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>轮播图</title>
<link rel="stylesheet" href="css/reset.css" />
<style>
.big{
position: absolute;
width: 450px;
height: 270px;
}
#ulimg li{
position: absolute;
z-index: 1;
opacity: 0;
transition: opacity 1s;
}
#ulimg .now{
position: absolute;
z-index: 2;
opacity: 1;
}
#arrows{
position: absolute;
top:90px;
z-index: 3;
width: 100%;
}
.arrow{
width: 30px;
height: 60px;
background-color: #191E2B;
font-size: 25px;
text-align: center;
line-height: 60px;
border-radius: 10px;
color: #FFFFFF;
float: left;
}
#rarrow{
float: right;
}
.big #arrows{
position: relative;
z-index: 1;
transition: z-index 1s;
opacity: 0;
cursor: pointer;
}
.btn{
width: 20px;
height: 20px;
background-color: whitesmoke;
font-size: 18px;
text-align: center;
float: left;
margin: 10px;
border-radius: 5px;
}
#btns{
position: relative;
z-index: 3;
margin-top: 220px;
margin-left: 220px;
cursor: pointer;
}
#btns .btn2{
background: orange;
}
</style>
</head>
<body>
<div class="big">
<ul id="ulimg">
<li class="now"><img src="img/01.jpg" alt=""/></li>
<li><img src="img/02.jpg" alt=""/></li>
<li><img src="img/03.jpg" alt=""/></li>
<li><img src="img/04.jpg" alt=""/></li>
<li><img src="img/05.jpg" alt=""/></li>
</ul>
<div id="arrows">
<div class="arrow"><</div>
<div class="arrow" id="rarrow">></div>
</div>
<div id="btns">
<div class="btn btn2">1</div>
<div class="btn">2</div>
<div class="btn">3</div>
<div class="btn">4</div>
<div class="btn">5</div>
</div>
</div>
<script src="js/imgs.js"></script>
</body>
</html>
js
var imgs=document.querySelectorAll("#ulimg li");
var big=document.querySelector(".big");
var index=0;
var timer=setInterval(change,1000);
var arrows=document.getElementById("arrows");
var arrowsbtns=document.getElementsByClassName("arrow");
var btns=document.getElementsByClassName("btn");
function resetbtns(){
for(var i=0;i<imgs.length;i++){
imgs[i].className="";
btns[i].className="btn";
btns[i].setAttribute("onclick","changeimg(this)");
}
}
function change(){
resetbtns();
index++;
if(index>=5){
index=0;
}
imgs[index].className="now";
btns[index].className="btn btn2";
}
big.onmouseover=function stop(){
clearInterval(timer);
arrows.style.zIndex=3;
arrows.style.opacity=1;
}
big.onmouseout=function start(){
clearInterval(timer);
timer=setInterval(change,1000);
arrows.style.zIndex=1;
arrows.style.opacity=0;
}
arrowsbtns[0].onclick=function leftChange(){
resetbtns();
index--;
if(index<=-1){
index=4;
}
imgs[index].className="now";
btns[index].className="btn btn2";
}
arrowsbtns[1].onclick=function rightChange(){
resetbtns();
index++;
if(index>=5){
index=0;
}
imgs[index].className="now";
btns[index].className="btn btn2";
}
function changeimg(obj){
resetbtns();
index=obj.innerHTML*1-1;
imgs[index].className="now";
btns[index].className="btn btn2";
}
Victory！
