Bootstrap 4导航栏，有2行

Question

Bootstrap 4导航栏，有2行我创建了一个带有Bootstrap 4 alpha 6的导航栏，左侧有一个大品牌/图标，还有2个navbar-nav，带有图标右侧的链接。一个导航有链接，另一个导航有图标。除了一件事，它正如我想要的那样工作。我希望2个导航栏出现在图标右侧的2个单独的行中。像这样：------------------------------------------------------               link link link link  brand-icon -------------------------------------------               icon icon icon------------------------------------------------------移动版仍将像现在一样垂直显示链接。我用flexbox尝试了几种不同的东西，但无法让它工作。这是我的代码：<nav class="navbar navbar-toggleable-md navbar-inverse bg-inverse">    <div class="container">        <button class="navbar-toggler navbar-toggler-right align-self-center mt-3" type="button" data-toggle="collapse" data-target="#navbarCollapse">            <span class="navbar-toggler-icon"></span>        </button>        <h1 class="py-2 ml-lg-2 mx-3"><a href="#"><i class="fa fa-envelope-open-o fa-lg" aria-hidden="true"></i></a></h1>        <div class="collapse navbar-collapse ml-lg-0 ml-3" id="navbarCollapse">            <ul class="navbar-nav">                <li class="nav-item active">                    <a class="nav-link" href="#">Home</a>                </li>                <li class="nav-item">                    <a class="nav-link" href="#">Product</a>                </li>                <li class="nav-item">                    <a class="nav-link" href="#">Shop</a>                </li>                <li class="nav-item">                    <a class="nav-link" href="#">About</a>                </li>                <li class="nav-item">                    <a class="nav-link" href="#">Events</a>                </li>            </ul>            <ul class="navbar-nav">                <li class="nav-item">                    <a class="nav-link pr-3" href="#"><i class="fa fa-facebook"></i></a>                </li>                <li class="nav-item">                    <a class="nav-link pr-3" href="#"><i class="fa fa-instagram"></i></a>                </li>                <li class="nav-item">

Answer 1

您可以使用flex-columnflexbox实用程序类在图标旁边垂直堆叠2个导航。这将flex-direction: column在navbar-collapsediv中，它的子元素垂直堆叠。

<nav class="navbar navbar-toggleable-md navbar-inverse bg-inverse">
    <div class="container">
        <button class="navbar-toggler navbar-toggler-right align-self-center mt-3" type="button" data-toggle="collapse" data-target="#navbarCollapse">
            <span class="navbar-toggler-icon"></span>
        </button>
        <h1 class="py-2 ml-lg-2 mx-3"><a href="#"><i class="fa fa-envelope-o fa-lg mt-2" aria-hidden="true"></i></a></h1>
        <div class="collapse navbar-collapse flex-column ml-lg-0 ml-3" id="navbarCollapse">
            <ul class="navbar-nav">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Product</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Shop</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">About</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Events</a>
                </li>
            </ul>
            <ul class="navbar-nav flex-row mb-2">
                <li class="nav-item">
                    <a class="nav-link py-1 pr-3" href="#"><i class="fa fa-facebook"></i></a>
                </li>
                <li class="nav-item">
                    <a class="nav-link py-1 pr-3" href="#"><i class="fa fa-instagram"></i></a>
                </li>
                <li class="nav-item">
                    <a class="nav-link py-1 pr-3" href="#"><i class="fa fa-twitter"></i></a>
                </li>
            </ul>
        </div>
    </div></nav>

演示 - 带有2行的Bootstrap 4导航栏

---

这是另一个带有2行和右对齐搜索形式的变体： 

<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarCollapse">
        <span class="navbar-toggler-icon"></span>
    </button>
    <a class="navbar-brand my-auto" href="#">Brand</a>
    <div class="collapse navbar-collapse flex-md-column" id="navbarCollapse">
        <ul class="navbar-nav ml-auto small">
            <li class="nav-item active">
                <a class="nav-link" href="#">Shop</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Products</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Team</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">About</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Events</a>
            </li>
        </ul>
        <form class="form-inline ml-auto">
            ...        </form>
    </div></nav>

演示 - 右侧有2行的Navbar

Answer 2

对于我来说，“2行右对齐的变化”没有正确对齐Safari中的行。我将无序列表放在带有flex-column和ml-auto类的新div中。

<nav class="navbar navbar-toggleable-md navbar-inverse bg-inverse">
    <div class="container">
      <button class="navbar-toggler navbar-toggler-right align-self-center mt-3" type="button" data-toggle="collapse" data-target="#navbarCollapse"> <span class="navbar-toggler-icon"></span> </button>
      <h1 class="py-2 ml-lg-2 mx-3"><a href="#"><i class="fa fa-envelope-open-o fa-lg" aria-hidden="true"></i></a></h1>
      <div class="collapse navbar-collapse ml-lg-0 ml-3" id="navbarCollapse">
        <div class="flex-column ml-auto">
          <ul class="navbar-nav">
            <li class="nav-item active"> <a class="nav-link" href="#">Home</a> </li>
            <li class="nav-item"> <a class="nav-link" href="#">Product</a> </li>
            <li class="nav-item"> <a class="nav-link" href="#">Shop</a> </li>
            <li class="nav-item"> <a class="nav-link" href="#">About</a> </li>
            <li class="nav-item"> <a class="nav-link" href="#">Events</a> </li>
          </ul>
          <ul class="navbar-nav">
            <li class="nav-item"> <a class="nav-link pr-3" href="#"><i class="fa fa-facebook"></i></a> </li>
            <li class="nav-item"> <a class="nav-link pr-3" href="#"><i class="fa fa-instagram"></i></a> </li>
            <li class="nav-item"> <a class="nav-link pr-3" href="#"><i class="fa fa-twitter"></i></a> </li>
          </ul>
        </div>
      </div>
    </div>
  </nav>