Bootstrap4 轮播

轮播是一个一个幻灯片组件，用来循环显示图片元素，或者滚动的文字。

轮播创建

以下实例创建了一个简单的图片轮播效果：

实例：

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/4.1.0/css/bootstrap.min.css">
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js"></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
  <style>
  /* Make the image fully responsive */
  .carousel-inner img {
      width: 100%;
      height: 100%;
  }
  </style>
</head>
<body>
<div id="demo" class="carousel slide" data-ride="carousel">
  <!-- 指示符 -->
  <ul class="carousel-indicators">
    <li data-target="#demo" data-slide-to="0" class="active"></li>
    <li data-target="#demo" data-slide-to="1"></li>
    <li data-target="#demo" data-slide-to="2"></li>
  </ul>
  <!-- 轮播图片 -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201803/24575.png">
    </div>
    <div class="carousel-item">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201801/31740.png">
    </div>
    <div class="carousel-item">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201804/30601.png">
    </div>
  </div>
  <!-- 左右切换按钮 -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>
</div>
</body>
</html>

轮播图片上添加描述

在每个 <div class="carousel-item"> 内添加 <div class="carousel-caption"> 来设置轮播图片的描述文本：:

实例:

<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap4 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/4.1.0/css/bootstrap.min.css">
  <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
  <script src="https://cdn.bootcss.com/popper.js/1.12.5/umd/popper.min.js"></script>
  <script src="https://cdn.bootcss.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
  <style>
  /* Make the image fully responsive */
  .carousel-inner img {
      width: 100%;
      height: 100%;
  }
  </style>
</head>
<body>
<div id="demo" class="carousel slide" data-ride="carousel">
  <!-- 指示符 -->
  <ul class="carousel-indicators">
    <li data-target="#demo" data-slide-to="0" class="active"></li>
    <li data-target="#demo" data-slide-to="1"></li>
    <li data-target="#demo" data-slide-to="2"></li>
  </ul>
  <!-- 轮播图片 -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201803/24575.png">
      <div class="carousel-caption">
        <h3>第一张图片描述标题</h3>
        <p>描述文字!</p>
      </div>
    </div>
    <div class="carousel-item">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201702/43125.png">
      <div class="carousel-caption">
        <h3>第二张图片描述标题</h3>
        <p>描述文字!</p>
      </div>
    </div>
    <div class="carousel-item">
      <img src="https://atts.w3cschool.cn/attachments/knowledge/201804/30601.png">
      <div class="carousel-caption">
        <h3>第三张图片描述标题</h3>
        <p>描述文字!</p>
      </div>
    </div>
  </div>
  <!-- 左右切换按钮 -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>
</div>
</body>
</html>

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Bootstrap4 轮播

轮播创建

轮播图片上添加描述