复制直接运行即可
DOCTYPE HTML>
<html>
<head>
<title>图片固定16:9尺寸title>
<link rel="stylesheet" href="https://cdn.staticfile.org/bootstrap/5.2.2/css/bootstrap.min.css"/>
head>
<body>
<div class="row" style="width: 95%;margin: 50px auto 0 auto ;">
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://static.veer.com/veer-v2/cms/20221019/dc890e0c23364913a5e222362d3b29d2.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片1
div>
div>
div>
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://tenfei01.cfp.cn/creative/vcg/veer/612/veer-129645925.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片2
div>
div>
div>
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://static.veer.com/veer-v2/cms/20221024/7d5f20e425c84c7b9dfedcf8c5845a28.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片3
div>
div>
div>
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://static.veer.com/veer-v2/cms/20221017/3e96d75130ab4f048b06a07101d30c99.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片4
div>
div>
div>
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://tenfei01.cfp.cn/creative/vcg/veer/612/veer-344356155.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片5
div>
div>
div>
<div class="col-lg-3 col-md-3 col-sm-12 col-xs-12">
<div class="box">
<a href="javascript:void(0)">
<div style="position: relative;width: 100%;padding-bottom: 56.25%;">
<img style="position: absolute;width: 100%;height: 100%;" src="https://tenfei01.cfp.cn/creative/vcg/veer/612/veer-410640525.jpg?x-oss-process=image/format,webp" alt="">
div>
a>
<div style="text-align: center;padding-top: 10px;color: #000;">
图片6
div>
div>
div>
div>
body>
html>
父元素: position:relative;width:100%;padding-bottom:56.25%;
子元素(img标签): position:absolute;width:100%;height:100%;





padding margin 如果为百分比 那么这个值便是父元素(最近的一个[内联]块级元素)的宽度值乘这个百分比
这个时候,img 父元素的高度就有了 也就是我们需要的16:9
如果需要其他比例,则用高除以宽度就ok
然后图片使用绝对定位在父元素上方就可以了
这种方式适合不定宽且不定高的场景,比如 响应式网页
百分比这块以后再详细讲一讲