教程内容

本教程将向您展示如何使用Bootstrap创建一个响应式导航栏。响应式导航栏可以适应不同屏幕尺寸的设备，提供更好的用户体验。

步骤一：引入Bootstrap CSS

首先，您需要在HTML页面的部分引入Bootstrap的CSS文件。您可以使用CDN链接，也可以下载Bootstrap文件并在本地引用。

步骤二：创建导航栏结构

接下来，您需要创建导航栏的基本结构。使用Bootstrap的<nav>、<navbar>、<navbar-brand>、<navbar-toggler>和<navbar-nav>等类来构建导航栏。

步骤三：添加导航项

在导航栏中添加导航项，使用<ul>和<li>标签来创建导航项的列表，并使用<a>标签来定义导航链接。

案例讲解

以下是一个完整的案例，展示了如何使用Bootstrap创建一个响应式导航栏：

<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
    <a class="navbar-brand" href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >品牌</a>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarNav">
        <ul class="navbar-nav ml-auto">
            <li class="nav-item active">
                <a class="nav-link" href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >首页 <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >功能</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >价格</a>
            </li>
            <li class="nav-item">
                <a class="nav-link disabled" href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  tabindex="-1" aria-disabled="true">禁用</a>
            </li>
        </ul>
    </div>
</nav>
        

将上述代码复制到您的HTML页面中，即可创建一个响应式导航栏。