<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.outer{
width: 790px;
height: 340px;
margin: 80px auto;
position: relative;/*一个相对，其他都是绝对固定*/
}
.img li{
position: absolute;
list-style: none;
top: 0;
left: 0;
}
.num{
position: absolute;
bottom: 18px;
left: 270px;
background-color: white;
list-style: none;
}
.num li{
display: inline-block;
width: 18px;
height: 18px;
background-color: red;
border-radius: 50%;
text-align: center;
line-height: 18px;
margin-left: 4px;
}
.btn{
position: absolute;
top: 50%;
/*left: 0;*/
width: 30px;
height: 60px;
background-color: lightgrey;
color: white;
text-align: center;
line-height: 60px;
font-size: 30px;
opacity: 0.7;
margin-top: -30px;
display: none;
}
.left{
left: 0px;
}
.right{
right: 0px;
}
.outer:hover .btn{/*悬浮的时候显示左右*/
display: inline-block;
}
</style>
</head>
<body>
<div class="outer">
<ul class="img">
<li><a href=""><img src="123.jpg" alt=""></a></li>
<li><a href=""><img src="123.jpg" alt=""></a></li>
<li><a href=""><img src="123.jpg" alt=""></a></li>
<li><a href=""><img src="123.jpg" alt=""></a></li>
<li><a href=""><img src="123.jpg" alt=""></a></li>
<li><a href=""><img src="123.jpg" alt=""></a></li>
</ul>
<ul class="num">
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
<li>6</li>
</ul>
<div class="left btn"> < </div>
<div class="right btn"> > </div>
</div>
<script src="jquery-3.3.1.min.js"></script><!--不加此句$不识别-->
<script>
</script>
</body>
</html>
