Bootstrap3、如何制作带有品牌形象和两行链接的导航栏?

Bootstrap 3, how to create a navbar with a brand image and two rows of links?

我不明白如何用 bootstrap 编写此导航代码:

如您所见,它由左侧的品牌图片、一些 space 以及应适合品牌长度和 window 宽度的两行组成。
我这样做了,但效果不佳。当我调整 window 大小时,导航有时会离开 window。

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

<nav class="navbar navbar-default">
  <div class="container-fluid" id="nav">
    <div class="row">
      <div class="navbar-header"> <a href="#"><img src="~/Images/logo.png" class="logo" width="308" height="130" alt="" style="float:left; margin-left:20px;margin-right:100px;"></a> </div>
      <ul class="nav navbar-nav">
        <li class="active">Link</li>
        <li>Link</li>
        <li>Link</li>
        <li>Link</li>
      </ul>
      <ul class="nav navbar-nav">
        <li>Link</li>
        <li>Link</li>
        <li>Link</li>
        <li>Link</li>
      </ul>
    </div>
  </div>
</nav>

让我们从 Bootstrap 文档中的 Default navbar 开始。

  1. 将品牌形象变成一个简单的非浮动块。
  2. 只在右侧留空space。
  3. 将所有菜单项合并为一个<ul></ul>,但使它们更高。
  4. 强制第 5 个元素开始新行。 清空一颗心,打开一颗心。所有项目都是左浮动的,所以 clear: left; 就足够了。

@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css');

.navbar-brand {
  display: block;            /* 1. */
  float:   none;
  height:  auto;
  margin:  0 !important;     /* 2. */
  padding: 0 20px 0 0;
}

@media (min-width: 768px) {
  .navbar-nav>li>a {         /* 3. */
    line-height:    21px;
    padding-top:    22px;
    padding-bottom: 22px;
  }

  .clear-left {              /* 4. */
    clear: left;
  }
}
<nav class="navbar navbar-default">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#"><img src="//placehold.it/308x130/c69/f9c/?text=Brand" alt=""></a>
    </div>
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Link 1</a></li>
        <li><a href="#">Link 2</a></li>
        <li><a href="#">Link 3</a></li>
        <li><a href="#">Link 4</a></li>
        <li class="clear-left"><a href="#">Link 5</a></li>
        <li><a href="#">Link 6</a></li>
        <li><a href="#">Link 7</a></li>
        <li><a href="#">Link 8</a></li>
      </ul>
    </div>
  </div>
</nav>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

在上面的HTML文件中,修改<ul class="nav navbar-nav"><ul class="nav navbar-nav pull-right"> 你已经把它放在右边了。

您可以为此使用 CSS Flexbox。这也将帮助您解决所有垂直和水平 centering/spacing 问题。

看看这个Codepen

或查看下面的代码片段(在预览时使用全屏查看桌面视图):

@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css');

.navbar-content-holder {
  display: flex;
  align-items: center;
}

.navbar-collapse {
  flex: 1;
}

.custom-nav-links {
  display: flex;
  flex-direction: column;
}

@media screen and (max-width: 767px) {
  .navbar-header {
    flex: 1;
  }
  
  .navbar-collapse {
    position: absolute;
    top: 50px;
    left: 0;
    width: 100%;
    padding: 0 30px;
    background: #F8F8F8;
  }
}
<nav class="navbar navbar-default">
  <div class="container-fluid">
    <div class="navbar-content-holder">
      <!-- Brand and toggle get grouped for better mobile display -->
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
          <span class="sr-only">Toggle navigation</span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">Brand</a>
      </div>

      <!-- Collect the nav links, forms, and other content for toggling -->
      <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <div class="navbar-right custom-nav-links">
          <ul class="nav navbar-nav">
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
              <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">Separated link</a></li>
              </ul>
            </li>
          </ul>
          <ul class="nav navbar-nav">
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
              <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li><a href="#">Separated link</a></li>
              </ul>
            </li>
          </ul>
        </div>
      </div><!-- /.navbar-collapse -->
    </div><!-- /.navbar-content-holder -->
  </div><!-- /.container-fluid -->
</nav>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

希望对您有所帮助!