我这里有一个代码片段，自从 col-xs-6 被弃用以来，我使用了引导程序 4 col-6。
我的问题是当浏览器窗口调整第二个 col-6 的大小时 上下移动(我的意思是响应能力(。
如何纠正？
<div class="container-fluid" style="border: 3px solid red;">
<div class="row">
<div class="col-6">
<img src="https://picsum.photos/id/237/200/300" class="img-responsive" width="200" height="200">
</div>
<div class="col-6">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. In vitae turpis massa sed elementum. Placerat orci nulla pellentesque dignissim.</p>
</div>
</div>
</div>如果您正确添加 Bootstrap CSS 和 JS，col-6将像col-xs-6一样工作。
我看到你还没有添加Bootstrap@4 CSS和JS文件。因此，没有引导 CSS 和 JS 文件，任何引导组件都无法工作。这是示例代码中的模板。
带有您的 HTML 的入门模板(已修改(。
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<title>Col-6 issue</title>
</head>
<body>
<div class="container-fluid" style="border: 3px solid red;">
<div class="row">
<div class="col-6" style="border: 2px solid yellow;">
<img src="https://picsum.photos/id/237/200/300" class="img-fluid d-block" />
</div>
<div class="col-6" style="border: 2px solid green;">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. In vitae turpis massa sed elementum. Placerat orci nulla pellentesque dignissim.</p>
</div>
</div>
</div>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
</body>
</html>
使用引导启动程序模板。你也犯了响应式imageclass的错误。img-responsiveclass在引导程序版本 4 中已弃用。现在它img-fluid响应式图像。如果要制作响应式图像，则应从img tag中删除width和heightattribute。你也学习了CSS3flex box。这是弹性框的完整指南。
希望这会有所帮助。
如果将col-6替换为col-md-6这将使父row在大屏幕上跨越页面，但列将在较小的屏幕尺寸中垂直响应
col-sm-6也是如此，但使用它取决于您需要哪个断点 _
有关断点大小的参考，请参阅：https://getbootstrap.com/docs/4.0/layout/grid/#grid-options
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
<div class="container-fluid" style="border: 3px solid red;">
<div class="row">
<div class="col-md-6">
<img src="https://picsum.photos/id/237/200/300" class="img-responsive" width="200" height="200">
</div>
<div class="col-md-6">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. In vitae turpis massa sed elementum. Placerat orci nulla pellentesque dignissim.</p>
</div>
</div>
</div>
<!-- javascript -->
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
<script></script>
</body>
</html>