Bootstrap4.1 导航栏垂直项目而不是水平相册示例

Question

我正在使用 Bootstrap 4.1 中的“相册”示例，无法让额外的导航项水平显示。

我尝试添加“navbar-expand-lg”，它把所有东西都带到了水平线上。但是，切换按钮（以及它的标题数据）消失并且变得无法访问。

代码如下；

<script src="http://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link href="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet"/>

<header>

      <!-- Navbar#1 Toggled - Detailed Header Info-->
      <div class="collapse bg-dark" id="navbarHeader">
        <div class="container">
          <div class="row">
            <div class="col-sm-8 col-md-7 py-4">
              <h4 class="text-white">About</h4>
              <p class="text-muted">Lines of Data Shortened.</p>
            </div>
            <div class="col-sm-4 offset-md-1 py-4">
              <h4 class="text-white">Contact</h4>
              <ul class="list-unstyled">
                <li><a href="#" class="text-white">Follow on Twitter</a></li>
                <li><a href="#" class="text-white">Like on Facebook</a></li>
                <li><a href="#" class="text-white">Email me</a></li>
              </ul>
            </div>
          </div>
        </div>
      </div>
      
      <!-- Navbar#2 Permanent Strip of Navbar -->
      <div class="navbar navbar-dark bg-dark shadow-sm">
        <div class="container d-flex justify-content-between">
          <a href="#" class="navbar-brand d-flex align-items-center">
             <!-- SVG Album Icon  -->
            <strong>Album</strong>
          </a>


          <!-- Nav Items Manually added -->
          <div class="navbar-nav mr-auto">
            <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
            <a class="nav-item nav-link" href="#">Features</a>
            <a class="nav-item nav-link" href="#">Pricing</a>
            <a class="nav-item nav-link disabled" href="#">Disabled</a>
          </div>

          <!-- Navbar#3 - Visible Toggle Button -->
          <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarHeader" aria-controls="navbarHeader" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
        </div>
      </div>
    </header>

Answer 1

将float: left;CSS 添加到您的li 项目中。 你也可以试试这个 https://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_navbar&stacked=h

Answer 2

我得到了答案。

导航栏是一个带有“d-flex”的弹性框。所以，我添加了一个“flex-row”，它可以水平放置导航项。 'mr-auto' 适当地带来利润。

<script src="http://code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link href="http://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" rel="stylesheet"/>

<header>

      <!-- Navbar#1 Toggled - Detailed Header Info-->
      <div class="collapse bg-dark" id="navbarHeader">
        <div class="container">
          <div class="row">
            <div class="col-sm-8 col-md-7 py-4">
              <h4 class="text-white">About</h4>
              <p class="text-muted">Lines of Data Shortened.</p>
            </div>
            <div class="col-sm-4 offset-md-1 py-4">
              <h4 class="text-white">Contact</h4>
              <ul class="list-unstyled">
                <li><a href="#" class="text-white">Follow on Twitter</a></li>
                <li><a href="#" class="text-white">Like on Facebook</a></li>
                <li><a href="#" class="text-white">Email me</a></li>
              </ul>
            </div>
          </div>
        </div>
      </div>
      
      <!-- Navbar#2 Permanent Strip of Navbar -->
      <div class="navbar navbar-dark bg-dark shadow-sm">
        <div class="container d-flex justify-content-between">
          <a href="#" class="navbar-brand d-flex align-items-center">
             <!-- SVG Album Icon  -->
            <strong>Album</strong>
          </a>


          <!-- Nav Items Manually added -->
          <div class="navbar-nav flex-row mr-auto">
            <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
            <a class="nav-item nav-link" href="#">Features</a>
            <a class="nav-item nav-link" href="#">Pricing</a>
            <a class="nav-item nav-link disabled" href="#">Disabled</a>
          </div>

          <!-- Navbar#3 - Visible Toggle Button -->
          <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarHeader" aria-controls="navbarHeader" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
          </button>
        </div>
      </div>
    </header>