我不知道为什么导航栏没有修复

Question

我已经将一个登录页面与Bootstrap放在一起，出于某种原因，导航栏没有修复。以下是导航栏的代码。

<nav class="navbar fixed-top navbar-inverse bg-primary navbar-toggleable-md navbar-light bg-faded">
<div class="container">
<button class="navbar-toggler navbar-toggler-right" 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 mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
    </ul>
  </div>
<a class="navbar-brand pull-sm-right mr-10" href="#">Aquastars Swimming  School</a>
</div>
</nav>

Answer 1

您的代码工作正常，因为您使用的是bootstrap 4。 您可以在此处查看代码的工作演示Codepen

<nav class="navbar fixed-top navbar-inverse bg-primary navbar-toggleable-md navbar-light bg-faded">
<div class="container">
<button class="navbar-toggler navbar-toggler-right" 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 mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
    </ul>
  </div>
<a class="navbar-brand pull-sm-right mr-10" href="#">Aquastars Swimming  School</a>
</div>
</nav>