在 Bootstrap 4 中对齐导航栏答案

【问题标题】：Justifying a navbar in Bootstrap 4在 Bootstrap 4 中对齐导航栏
【发布时间】：2018-02-03 10:14:32
【问题描述】：

我有一个导航栏，我使用了split button dropdowns 和常规nav-items，没有下拉菜单。

我有一些工作，但我试图让导航元素填充浏览器窗口。我已经看到了对可以执行此操作的“工厂”Bootstrap 类的引用，但我无法使其正常工作。

我有两个问题：

在 Bootstrap 4 中执行此操作的“工厂”方法是什么？
为什么按钮元素间距不一致？

body {
  padding-top: 70px
}

.vcenter {
  display: inline-block;
  vertical-align: middle;
  float: none;
}


/* CSS menu */
.navbar, .navbar.btn-secondary {
  /* For browsers that do not support gradients */
  background-color: #b32017;
  /* For Safari 5.1 to 6.0 */
  background: -webkit-linear-gradient(#b32017, #801710);
  /* For Opera 11.1 to 12.0 */
  background: -o-linear-gradient(#b32017, #801710);
  /* For Firefox 3.6 to 15 */
  background: -moz-linear-gradient(#b32017, #801710);
  /* Standard syntax */
  background: linear-gradient(#b32017, #801710);
}

.navbar .btn-secondary {
  /*background-color: #b32017;*/
  /* For browsers that do not support gradients */
  background-color: #b32017;
  /* For Safari 5.1 to 6.0 */
  background: -webkit-linear-gradient(#b32017, #801710);
  /* For Opera 11.1 to 12.0 */
  background: -o-linear-gradient(#b32017, #801710);
  /* For Firefox 3.6 to 15 */
  background: -moz-linear-gradient(#b32017, #801710);
  /* Standard syntax */
  background: linear-gradient(#b32017, #801710);
}

.navbar img {
  max-height: 40px;
}

.navbar .btn {
  /* Removes Bootstrap's border */
  border: 0px;
}

.navbar .navbar-brand {
  color: #ffffff;
}

.navbar .navbar-brand:hover, .navbar .navbar-brand:focus {
  color: #c1c1c1;
}

.navbar .navbar-text {
  color: #ffffff;
}

.navbar .navbar-nav .nav-link {
  color: #ffffff;
  border-radius: .25rem;
  margin: 0 0.25em;
}

.navbar .navbar-nav .nav-link:not(.disabled):hover, .navbar .navbar-nav .nav-link:not(.disabled):focus {
  color: #c1c1c1;
}

.navbar .navbar-nav .nav-item.active .nav-link, .navbar .navbar-nav .nav-item.active .nav-link:hover, .navbar .navbar-nav .nav-item.active .nav-link:focus, .navbar .navbar-nav .nav-item.show .nav-link, .navbar .navbar-nav .nav-item.show .nav-link:hover, .navbar .navbar-nav .nav-item.show .nav-link:focus {
  color: #c1c1c1;
  background-color: #801710;
}

.navbar .navbar-toggle {
  border-color: #801710;
}

.navbar .navbar-toggle:hover, .navbar .navbar-toggle:focus {
  background-color: #801710;
}

.navbar .navbar-toggle .navbar-toggler-icon {
  color: #ffffff;
}

.navbar .navbar-collapse, .navbar .navbar-form {
  border-color: #ffffff;
}

.navbar .navbar-link {
  color: #ffffff;
}

.navbar .navbar-link:hover {
  color: #c1c1c1;
}

@media (max-width: 767px) {
  .navbar .navbar-nav .open .dropdown-menu .dropdown-item .dropdown-menu.show {
    /* no gradient support */
    /* #cccccc */
    color: #ffffff;

    /* For browsers that do not support gradients */
    background-color: #ffffff;
    /* For Safari 5.1 to 6.0 */
    background: -webkit-linear-gradient(#ffffff, #cccccc);
    /* For Opera 11.1 to 12.0 */
    background: -o-linear-gradient(#ffffff, #cccccc);
    /* For Firefox 3.6 to 15 */
    background: -moz-linear-gradient(#ffffff, #cccccc);
    /* Standard syntax */
    background: linear-gradient(#ffffff, #cccccc);

  }
  .navbar .navbar-nav .open .dropdown-menu .dropdown-item:hover, .navbar .navbar-nav .open .dropdown-menu .dropdown-item:focus {
    color: #c1c1c1;
  }
  .navbar .navbar-nav .open .dropdown-menu .dropdown-item.active {
    color: #c1c1c1;
    background-color: #801710;
  }
}

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet"/>
<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <title>Experimental Test Page</title>
</head>

<body>
  <!-- Navigation -->
  <nav class="navbar fixed-top navbar-expand-sm bg-faded navbar-light">
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#nav-content" aria-controls="nav-content" aria-expanded="false" aria-label="Toggle navigation">
  <span class="navbar-toggler-icon"></span>
  </button>
    <!-- Brand -->
    <a class="navbar-brand" href="#">
    </a>
    <div class="collapse navbar-collapse" id="nav-content">
      <ul class="navbar-nav btn-group">
        <!-- Home -->
        <li class="nav-item">
          <div class="btn-group">
            <a href="#" class="btn btn-secondary" role="button"><i class="fa fa-fw fa-home"><!-- --></i> Home</a>
            <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown">
            </button>
            <div class="dropdown-menu">
              <a class="dropdown-item" href="#"><i class="fa fa-fw fa-map-marker"><!-- --></i>Hours &amp; Location</a>
            </div>
          </div>
        </li>
        <li class="nav-item">
          <div class="btn-group" role="button">
            <a href="#" class="btn btn-secondary" role="button">Section</a>
            <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown">
            </button>
            <div class="dropdown-menu">
              <a class="dropdown-item" href="#">Item 1</a>
              <a class="dropdown-item" href="#">Item 2</a>
              <a class="dropdown-item" href="#">Item 3</a>
              <a class="dropdown-item" href="#">Item 4</a>
            </div>
          </div>
        </li>
        <li class="nav-item">
          <a class="nav-link btn btn-secondary" href="#" role="button">Another Section</a>
        </li>
        <li class="nav-item">
          <a class="nav-link btn btn-secondary" href="#" role="button">Section</a>
        </li>
        <li class="nav-item">
          <a class="nav-link btn btn-secondary" href="#" role="button">Section</a>
        </li>
        <li class="nav-item">
          <div class="btn-group" role="button">
            <a href="#" class="btn btn-secondary" role="button">Products</a>
            <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown">
            </button>
            <div class="dropdown-menu">
              <a class="dropdown-item" href="#">Item 1</a>
              <a class="dropdown-item" href="#">Item 2</a>
            </div>
          </div>
        </li>
      </ul>
    </div>
  </nav>
</body>

</html>

【问题讨论】：

标签： jquery html css twitter-bootstrap bootstrap-4

【解决方案1】：

您可以使用nav-justified，确保使用w-100 的navbar-nav 是全宽...

<ul class="navbar-nav w-100 nav-justified">
      <li class="nav-item">..<li>
      <li class="nav-item">..<li>
</ul>

https://codeply.com/go/od0TnGfQv2

【讨论】：

感谢您的及时回复！您会推荐什么作为让拆分按钮组像独立链接一样更改hover 上的文本颜色的正确方法？
知道了！在按钮上添加nav-link 作为类，使它们的行为与独立链接一样。
nav-fill 在某些情况下可能是nav-justified 的更好替代品，因为每个项目的宽度都会适应内容

【解决方案2】：

我遇到了同样的问题，但有徽标。我刚刚添加了nav-justified 和w-100 类以及navbar-nav 类。

这里是导航栏的截图。

这里是代码：

<nav class="navbar navbar-toggleable-md navbar-light bg-faded px-5">
        <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>
        <a class="navbar-brand" href="#">
            <img src="img/logo.png" class="img-fluid" alt="Logo">
        </a>
        <div class="collapse navbar-collapse" id="navbarNav">
            <ul class="navbar-nav nav-justified w-100">
                <li class="nav-item active">
                    <a class="nav-link" href="#">About us</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#"> Services</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">  Mission & Vission</a>
                </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                        Brands
                    </a>
                    <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
                        <a class="dropdown-item" href="#">Alo maids</a>
                        <a class="dropdown-item" href="#">Alo Technical</a>
                        <a class="dropdown-item" href="#">Something else here</a>
                    </div>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">   Brands</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#">   Brands</a>
                </li>
            </ul>
        </div>
    </nav>

【讨论】：

【解决方案3】：

添加类 w-100 @ navbar

并添加类 nav-fill w-100 @ navbar-nav

<nav class="navbar navbar-expand-lg navbar-light w-100">
    <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#nvb1" aria-controls="nvb1" aria-expanded="false" aria-label="Menu switcher">
        <span class="navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="nvb1">
        <ul class="navbar-nav nav-fill w-100">
            <li class="nav-item active"><a href="{{ url('/') }}" class="nav-link">Home</a></li>
            <li class="nav-item"><a href="{{ url('') }}" class="nav-link">Links</a></li>
            <li class="nav-item"><a href="{{ url('') }}" class="nav-link">Links</a></li>
        </ul>
    </div>
</nav>

https://jsfiddle.net/Cotiga/84kc3rqL/

【讨论】：

【解决方案4】：

对于Bootstrap4，这会更好

<ul class="navbar nav  nav-justified">
    <li class="nav-item">Match Found</li>
    <li class="nav-item">Shortlist</li>               
</ul>

【讨论】：