Question

我有一个引导导航栏，我希望同时具有可折叠和不可折叠的菜单项。

我的代码如下：

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

<nav class="navbar navbar-toggleable-md navbar-light fixed-top">
  <div class="container">
    <a class="navbar-brand" href="https://ngohub.asia">
      <%= image_tag 'ngohublogo.png', class: 'hidden-md-down img-responsive', style: 'width: 100%'%>
        <%= image_tag 'ngohublogo.png', class: 'hidden-lg-up img-responsive w-100'%>
    </a>
    <div class="w-100" style="float:right;">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item active">
          <a class="nav-link" href="#">Login <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item active">
          <a class="nav-link">|</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Sign Up </a>
        </li>
      </ul>
    </div>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <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="#">Link</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Dropdown
              </a>
          <div class="dropdown-menu" aria-labelledby="navbarDropdown">
            <a class="dropdown-item" href="#">Action</a>
            <a class="dropdown-item" href="#">Another action</a>
            <div class="dropdown-divider"></div>
            <a class="dropdown-item" href="#">Something else here</a>
          </div>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#">Disabled</a>
        </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
        <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
      </form>
    </div>
</nav>

登录和注册链接按预期显示在品牌左侧，但是，当我减小浏览器窗口的大小以模拟移动设备时，链接并没有与品牌共享空间，就像我想要的那样：

它在全屏屏幕上

在模拟移动视图中。我想登录并注册在品牌旁边和汉堡旁边

Answer 1

首先要注意的是，visibility helpers在最新版本的引导程序中已重命名。 hidden-md已替换为.d-md-none，等等。

第二，我确保在flex-direction: row;上声明.navbar-nav，以使其子元素水平排列，而不是垂直排列。

.navbar .navbar-nav{
  flex-direction: row;
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">

<nav class="navbar navbar-toggleable-md navbar-light fixed-top">
  <div class="container">
    <a class="navbar-brand" href="https://ngohub.asia">
      <img src="https://via.placeholder.com/200x50" class="hidden-md-down img-responsive" style="width: 100%" />
    </a>
    <div style="float:right;">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item active">
          <a class="nav-link" href="#">Login <span class="sr-only">(current)</span></a>
        </li>
        <li class="nav-item active">
          <a class="nav-link">|</a>
        </li>
        <li class="nav-item">
          <a class="nav-link" href="#">Sign Up </a>
        </li>
      </ul>
    </div>
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>

    <div class="collapse navbar-collapse" id="navbarSupportedContent">
      <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="#">Link</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Dropdown
              </a>
          <div class="dropdown-menu" aria-labelledby="navbarDropdown">
            <a class="dropdown-item" href="#">Action</a>
            <a class="dropdown-item" href="#">Another action</a>
            <div class="dropdown-divider"></div>
            <a class="dropdown-item" href="#">Something else here</a>
          </div>
        </li>
        <li class="nav-item">
          <a class="nav-link disabled" href="#">Disabled</a>
        </li>
      </ul>
      <form class="form-inline my-2 my-lg-0">
        <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
        <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
      </form>
    </div>
</nav>

Answer 2

有几种不同的方法可以解决此问题。请记住，在Bootstrap 4.1中，navbar-toggleable类已被navbar-expand-取代。

在第一个navbar-nav上使用flex-row，这样它就不会在较小屏幕上的一列中环绕/堆叠。在折叠处使用flex-grow-1，以扩大剩余宽度。

演示：https://www.codeply.com/go/LBY9LXio09

<nav class="navbar clg navbar-light fixed-top">
    <div class="container-fluid">
        <a class="navbar-brand" href="https://ngohub.asia">
            <img src="//placehold.it/40?text=sm" class="d-lg-none d-inline">
            <img src="//placehold.it/100x30?text=lg" class="d-lg-inline d-none">
        </a>
        <div class="mr-auto flex-shrink-1">
            <ul class="navbar-nav flex-row">
                <li class="nav-item active">
                    <a class="nav-link" href="#">Login <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item px-1">
                    <a class="nav-link">|</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">Sign Up </a>
                </li>
            </ul>
        </div>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse flex-grow-1" id="navbarSupportedContent">
            <ul class="navbar-nav ml-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="#">Link</a>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Dropdown
              </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                        <a class="dropdown-item" href="#">Action</a>
                        <a class="dropdown-item" href="#">Another action</a>
                        <div class="dropdown-divider"></div>
                        <a class="dropdown-item" href="#">Something else here</a>
                    </div>
                </li>
                <li class="nav-item">
                    <a class="nav-link disabled" href="#">Disabled</a>
                </li>
            </ul>
            <form class="form-inline d-inline my-2 my-lg-0">
                <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
                <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
            </form>
        </div>
    </div>
</nav>

bootstrap 4混合了可折叠和不可折叠的导航元素

2 个答案: