我正在尝试在Bootstrap中创建一个响应式卡片组。卡片机应在移动设备上每行显示一张卡，在平板电脑上每行显示2张卡，在台式机上每行显示3张卡。
下面是我的代码-
<div class="container">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">2 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="w-100 d-none d-sm-block d-md-none"><!-- wrap every 2 on sm--></div>
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">3 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
<div class="w-100 d-none d-md-block d-lg-none"><!-- wrap every 3 on md--></div>
</div>
平板电脑部分似乎无法正常工作。帮助吗？
答案 0 :(得分：0)
尝试此代码，但首先在页面下载链接中继承Bootstrap v4.1.3 https://getbootstrap.com/docs/4.1/getting-started/download/
INACTIVE答案 1 :(得分：0)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
<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">
<div class="row">
<div class="col-md-6 col-lg-4 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
<div class="col-md-6 col-lg-4 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
<div class="col-md-6 col-lg-4 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
<div class="col-lg-4 col-md-6 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
<div class="col-lg-4 col-md-6 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
<div class="col-lg-4 col-md-6 col-12">
<div class="card-deck">
<div class="card mb-4">
<img class="card-img-top img-fluid" src="//placehold.it/500x280" alt="Card image cap">
<div class="card-body">
<h4 class="card-title">1 Card title</h4>
<p class="card-text">This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
<p class="card-text"><small class="text-muted">Last updated 3 mins ago</small></p>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
希望它会为您提供帮助