Bootstrap 4 左右菜单切换按钮，品牌在中心

Question

我有一个在大屏幕上看起来像这样的导航栏菜单：

并在较小的屏幕上折叠成这样：

但我想在左边有一个菜单按钮，在右边有另一个菜单按钮，品牌在中间。像这样：

我不确定这是否可行，如果可以，那么诀窍是什么？

代码（使用 bootstrap 4 beta）：

<nav class="navbar navbar-expand-lg navbar-dark bg-primary fixed-top">
  <div class="container">
    <a class="navbar-brand logo-font" href="#">
        Brand
    </a>
    <!-- links toggle -->
    <button class="navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#links" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
      <i class="fa fa-bars"></i>
    </button>
    <!-- account toggle --> 
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#account" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
      <i class="fa fa-user"></i>
    </button>

    <div class="collapse navbar-collapse" id="links">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item active">
          <a class="nav-link" href="#">Link 1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 2</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 3</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 4</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Link 5</a>
        </li>
        <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              Other
            </a>
            <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
              <a class="dropdown-item" href="#">Dropdown 1</a>
              <a class="dropdown-item" href="#">Dropdown 2</a>
              <a class="dropdown-item" href="#">Dropdown 3</a>
            </div>
          </li>
      </ul>
      </div>
      <div class="collapse navbar-collapse" id="account">
      <ul class="navbar-nav ml-auto">
        <li class="nav-item"><a class="nav-link" href="#">Register</a></li>
        <li class="nav-item"><a class="nav-link" href="#">Log in</a></li>
      </ul>
    </div>
  </div>
</nav>

Link to Codeply

Answer 1

是的，Bootstrap 4 确实有一个非常巧妙的技巧。这称为重新排序。

将第一个导航栏切换器上的 ml-auto 类替换为 order-first 类。这将把它作为第一项。

注意：将与第一个 navbar-toggler 关联的 HTML 代码移动到 navbar-brand 的 HTML 之前将达到相同的效果。但我觉得使用类更优雅、更灵活，而不是移动 HTML 代码块。

导航栏切换器仅在需要时才可见。这就是为什么在这种情况下将它放在第一位的原因。

代码如下：

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">


<nav class="navbar navbar-expand-lg navbar-dark bg-primary fixed-top">
    <div class="container">
        <a class="navbar-brand logo-font" href="#">
            Brand
        </a>
        <!-- links toggle -->
        <button class="navbar-toggler order-first" type="button" data-toggle="collapse" data-target="#links" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
            <i class="fa fa-bars"></i>
        </button>
        <!-- account toggle -->
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#account" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
            <i class="fa fa-user"></i>
        </button>

        <div class="collapse navbar-collapse" id="links">
            <ul class="navbar-nav mr-auto">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Link 1</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link 2</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link 3</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link 4</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Link 5</a>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                        Other
                    </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                        <a class="dropdown-item" href="#">Dropdown 1</a>
                        <a class="dropdown-item" href="#">Dropdown 2</a>
                        <a class="dropdown-item" href="#">Dropdown 3</a>
                    </div>
                </li>
            </ul>
        </div>
        <div class="collapse navbar-collapse" id="account">
            <ul class="navbar-nav ml-auto">
                <li class="nav-item"><a class="nav-link" href="#">Register</a></li>
                <li class="nav-item"><a class="nav-link" href="#">Log in</a></li>
            </ul>
        </div>
    </div>
</nav>


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