<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin:0px;
padding:0px;
}
/* 轮播可视区 */
.viewArea{
position:relative;
width:616px;
height:350px;
margin:0 auto;
overflow:hidden;
border-radius:25px;
}
/* 轮播胶片 */
.viewArea>.film{
position:absolute;
list-style-type:none;
width:3696px;
height:350px;
}
.viewArea>.film::after{
content:"";
display:block;
clear:both;
}
.viewArea>.film>li{
float:left;
width:616px;
height:350px;
}
.viewArea>.film>li>img{
width:616px;
height:350px;
}
/* 圆点按钮 */
.viewArea>.dotButton{
list-style-type:none;
position:absolute;
width:70px;
height:13px;
margin:0 auto;
background-color: rgba(255,255,255,.3);
bottom:15px;
left:50%;
margin-left:-35px;
border-radius:10px;
}
.viewArea>.dotButton::after{
content:"";
display:block;
clear:both;
}
.viewArea>.dotButton>li{
cursor:pointer;
float:left;
width:8px;
height:0px;
padding-top:8px;
background-color:#fff;
border-radius:50%;
margin:3px;
}
/*圆点点击后的样式,通过js添加*/
.selected{
background-color:#ff5000 !important;
}
/* 左横移图片按钮 */
.viewArea>.moveLeft{
cursor:pointer;
text-align:center;
position:absolute;
top:50%;
margin-top:-25px;
left:0px;
color:#fff;
width:50px;
height:50px;
line-height:45px;
background-color: rgba(0,0,0,.3);
border-radius:50%;
margin-left:-18px;
font-size:30px;
}
/* 右横移图片按钮 */
.viewArea>.moveRight{
cursor:pointer;
text-align:center;
position:absolute;
top:50%;
margin-top:-25px;
right:0px;
color:#fff;
width:50px;
height:50px;
line-height:45px;
background-color: rgba(0,0,0,.3);
border-radius:50%;
margin-right:-18px;
font-size:30px;
}
</style>
</head>
<body>
<!-- 轮播可视区 -->
<div class = "viewArea">
<!-- 轮播胶片 -->
<ul class = "film" style = "left:0px">
<!-- 轮播胶片中每一个帧图片 -->
<li><img src="https://img.alicdn.com/imgextra/i1/2206686532409/O1CN01D1qn4x1TfMmtNojqs_!!2206686532409-0-lubanimage.jpg" alt=""></li>
<li><img src="https://aecpm.alicdn.com/simba/img/TB1XotJXQfb_uJkSnhJSuvdDVXa.jpg" alt=""></li>
<li><img src="https://aecpm.alicdn.com/simba/img/TB1JNHwKFXXXXafXVXXSutbFXXX.jpg" alt=""></li>
<li><img src="https://aecpm.alicdn.com/simba/img/TB183NQapLM8KJjSZFBSutJHVXa.jpg" alt=""></li>
<li><img src="https://img.alicdn.com/imgextra/i2/2206686532409/O1CN01hwxuV31TfMmpTL30L_!!2206686532409-0-lubanimage.jpg" alt=""></li>
<!-- 实际用到5张图片,
但是当第五张图片播完之后,立马切回第一张图片之前,有一个第五张图片还没播完但是已经移动了**px的空白区域
我们不想让用户看见所以让第6张图片顶替一下空白区域,等第五张图片播完之后,立马切回第一张图片
那我们选用什么图片顶替用第一帧的图片,目的是不让用户看到立马切回第一张图片的那一瞬间-->
<li><img src="https://img.alicdn.com/imgextra/i1/2206686532409/O1CN01D1qn4x1TfMmtNojqs_!!2206686532409-0-lubanimage.jpg" alt=""></li>
</ul>
<!-- 圆点按钮 -->
<ul class = "dotButton">
<!-- 每一个小按钮 -->
<li class = "dotButtonLi"></li>
<li class = "dotButtonLi"></li>
<li class = "dotButtonLi"></li>
<li class = "dotButtonLi"></li>
<li class = "dotButtonLi"></li>
</ul>
<!-- 左横移图片按钮 -->
<div class = "moveLeft" style = "display:none"><</div>
<!-- 右横移图片按钮 -->
<div class = "moveRight" style = "display:none">></div>
</div>
<script type = "text/javascript">
// 轮播胶片
var film = document.getElementsByClassName("film")[0];
// 圆点按钮
var dotButtonLi = document.getElementsByClassName("dotButtonLi");
//可视区
var viewArea = document.getElementsByClassName("viewArea")[0];
//左横移图片按钮
var moveLeft = document.getElementsByClassName("moveLeft")[0];
//右横移图片按钮
var moveRight = document.getElementsByClassName("moveRight")[0];
//轮播功能 && 图片(主体)和圆点联动功能
var timer = setInterval(function(){
//动起来
film.style.left = parseInt(film.style.left) - 1 + "px";
//无缝衔接
if(parseInt(film.style.left) < -3080){
//当第五张图片播完后,立马切回第一张图片
film.style.left = "0px";
}
//当第1张图片播完后,立马切回第5张图片
if(parseInt(film.style.left) > 0){
film.style.left = "-2464px";
}
//对应图片对应颜色
if(parseInt(film.style.left) < 0 && parseInt(film.style.left) > -616){
dotButtonLi[0].className += " selected";
dotButtonLi[1].className = "dotButtonLi";
dotButtonLi[2].className = "dotButtonLi";
dotButtonLi[3].className = "dotButtonLi";
dotButtonLi[4].className = "dotButtonLi";
}else if(parseInt(film.style.left) < -616 && parseInt(film.style.left) > -1232){
dotButtonLi[1].className += " selected";
dotButtonLi[0].className = "dotButtonLi";
dotButtonLi[2].className = "dotButtonLi";
dotButtonLi[3].className = "dotButtonLi";
dotButtonLi[4].className = "dotButtonLi";
}else if(parseInt(film.style.left) < -1232 && parseInt(film.style.left) > -1848){
dotButtonLi[2].className += " selected";
dotButtonLi[1].className = "dotButtonLi";
dotButtonLi[0].className = "dotButtonLi";
dotButtonLi[3].className = "dotButtonLi";
dotButtonLi[4].className = "dotButtonLi";
}else if(parseInt(film.style.left) < -1848 && parseInt(film.style.left) > -2464){
dotButtonLi[3].className += " selected";
dotButtonLi[1].className = "dotButtonLi";
dotButtonLi[2].className = "dotButtonLi";
dotButtonLi[0].className = "dotButtonLi";
dotButtonLi[4].className = "dotButtonLi";
}else if(parseInt(film.style.left) < -2464 && parseInt(film.style.left) > -3080){
dotButtonLi[4].className += " selected";
dotButtonLi[1].className = "dotButtonLi";
dotButtonLi[2].className = "dotButtonLi";
dotButtonLi[3].className = "dotButtonLi";
dotButtonLi[0].className = "dotButtonLi";
}
},10)
//图片和圆点(主体)联动功能
for(var i = 0; i < dotButtonLi.length; i++){
(function(i){
dotButtonLi[i].addEventListener("click",function(){
//点击变换颜色
this.className += " selected";
//只允许一个颜色发生变换
for(var j = 0; j < dotButtonLi.length; j++){
if(i !== j){
dotButtonLi[j].className = "dotButtonLi";
}
}
//点击跳转到对应图片
film.style.left = -i * 616 + "px";
},false)
}(i))
}
//可视区与左右横移按钮联动功能
//显示
viewArea.addEventListener("mouseenter",function(){
moveLeft.style.display = "inline-block";
moveRight.style.display = "inline-block";
},false)
//消失
viewArea.addEventListener("mouseleave",function(){
moveLeft.style.display = "none";
moveRight.style.display = "none";
},false)
//左横移功能
moveLeft.addEventListener("click",function(){
film.style.left = parseInt(film.style.left) - 816 + "px";
},false)
//右横移功能
moveRight.addEventListener("click",function(){
film.style.left = parseInt(film.style.left) + 816 + "px";
},false)
</script>
</body>
</html>
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Origin blog.csdn.net/weixin_48727085/article/details/114978031
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