css - 带左对齐、居中对齐或右对齐元素的 Bootstrap NavBar

Question

在 Bootstrap 中，创建左侧有 Logo A、中间有菜单项、右侧有 Logo B 的导航栏的最平台友好的方法是什么？

这是我到目前为止尝试过的方法，它最终被对齐，因此 Logo A 位于左侧， Logo 旁边的菜单项位于左侧， Logo B 位于右侧。

<div class="navbar navbar-fixed-top navbar-custom ">
  <div class="container" >
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#"><span class="navbar-logo">Logo_A</span></a>
    </div>
    <div class="collapse navbar-collapse">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home</a></li>
        <li><a href="#about">Menu Item 1</a></li>
        <li><a href="#contact">Menu Item 2</a></li>
        <li><a href="#about">Menu Item 3</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#"><img src="images/Logo_B.png" class="img-responsive"></a></li>
      </ul>
    </div>
  </div>
</div>

Answer 1

2021 年更新

Bootstrap 5(测试版)

Bootstrap 5 也有一个 flexbox Navbar，并引入了新的 RTL 支持。因此，“左”和“右”的概念已被“开始”和“结束”所取代。因此，Bootstrap 5 beta 的 margin 实用程序发生了变化:

• ml-auto => ms-auto
• mr-auto => me-auto

另请注意，data-toggle 和 data-target 也发生了变化:

• 数据切换 => data-bs-toggle
• 数据目标 => 数据bs目标

Navbar Demo for Bootstrap 5

Bootstrap 4

现在 Bootstrap 4 有了 flexbox，导航栏对齐就容易多了。这里是updated examples for left, right and center in the Bootstrap 4 Navbar , 和 many other alignment scenarios demonstrated here .

flexbox , auto-margins , 和 ordering实用程序类可用于根据需要对齐导航栏内容。有很多事情需要考虑，包括导航栏元素(品牌、链接、切换器)在大屏幕和移动/折叠 View 上的顺序和对齐方式。 不要为导航栏使用网格类 (row,col)。

这里有各种例子......

左、中(品牌)和右链接:

<nav class="navbar navbar-expand-md navbar-dark bg-dark">
    <div class="navbar-collapse collapse w-100 order-1 order-md-0 dual-collapse2">
        <ul class="navbar-nav mr-auto">
            <li class="nav-item active">
                <a class="nav-link" href="#">Left</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="//codeply.com">Codeply</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
        </ul>
    </div>
    <div class="mx-auto order-0">
        <a class="navbar-brand mx-auto" href="#">Navbar 2</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".dual-collapse2">
            <span class="navbar-toggler-icon"></span>
        </button>
    </div>
    <div class="navbar-collapse collapse w-100 order-3 dual-collapse2">
        <ul class="navbar-nav ml-auto">
            <li class="nav-item">
                <a class="nav-link" href="#">Right</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
        </ul>
    </div>
</nav>

http://codeply.com/go/qhaBrcWp3v

另一个带有 center links and overlay logo image 的 BS4 导航栏选项:

<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
    <div class="navbar-collapse collapse w-100 dual-collapse2 order-1 order-md-0">
        <ul class="navbar-nav ml-auto text-center">
            <li class="nav-item active">
                <a class="nav-link" href="#">Link</a>
            </li>
        </ul>
    </div>
    <div class="mx-auto my-2 order-0 order-md-1 position-relative">
        <a class="mx-auto" href="#">
            <img src="//placehold.it/120/ccff00" class="rounded-circle">
        </a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".dual-collapse2">
            <span class="navbar-toggler-icon"></span>
        </button>
    </div>
    <div class="navbar-collapse collapse w-100 dual-collapse2 order-2 order-md-2">
        <ul class="navbar-nav mr-auto text-center">
            <li class="nav-item">
                <a class="nav-link" href="#">Link</a>
            </li>
        </ul>
    </div>
</nav>

或者，这些其他 Bootstrap 4 对齐场景:

brand left, dead center links, (empty right)

---

brand and links center, icons left and right

---

更多 Bootstrap 4 示例:

toggler left on mobile, brand right
center brand and links on mobile
right align links on desktop, center links on mobile
left links & toggler, center brand, search right

---

另见:Bootstrap align navbar items to the right
Bootstrap 4 navbar right align with button that doesn't collapse on mobile
Center an element in Bootstrap Navbar

---

Bootstrap 3

选项 1 - 品牌中心，带有左/右导航链接:

<nav class="navbar navbar-default" role="navigation">
  <div class="navbar-header">
    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>    
  </div>
  <a class="navbar-brand" href="#">Brand</a>
  <div class="navbar-collapse collapse">
    <ul class="nav navbar-nav navbar-left">
        <li><a href="#">Left</a></li>
        <li><a href="#about">Left</a></li>
    </ul>
    <ul class="nav navbar-nav navbar-right">
      <li><a href="#about">Right</a></li>
      <li><a href="#contact">Right</a></li>
    </ul>
  </div>
</nav>

.navbar-brand
{
    position: absolute;
    width: 100%;
    left: 0;
    text-align: center;
    margin:0 auto;
}
.navbar-toggle {
    z-index:3;
}

https://codeply.com/p/X6Uv70mMVi (3.x)

---

选项 2 - 左、中和右导航链接:

<nav class="navbar navbar-default" role="navigation">
  <div class="navbar-header">
    <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
      <span class="icon-bar"></span>
    </button>    
  </div>
  <div class="navbar-collapse collapse">
    <ul class="nav navbar-nav">
        <li><a href="#">Left</a></li>
    </ul>
    <ul class="nav navbar-nav navbar-center">
        <li><a href="#">Center</a></li>
        <li><a href="#">Center</a></li>
      <li><a href="#">Center</a></li>
    </ul>
    <ul class="nav navbar-nav navbar-right">
        <li><a href="#">Right</a></li>
    </ul>
  </div>
</nav>

@media (min-width: 768px) {
  .navbar-nav.navbar-center {
    position: absolute;
    left: 50%;
    transform: translatex(-50%);
  }
}

https://codeply.com/p/v7pQKZacTg

选项 3 - 品牌和链接居中

.navbar .navbar-header,
.navbar-collapse {
    float:none;
    display:inline-block;
    vertical-align: top;
}

@media (max-width: 768px) {
    .navbar-collapse  {
        display: block;
    }
}

http://codeply.com/go/1lrdvNH9GI

更多示例:

Left brand, center links
Left toggler, center brand

对于 3.x，另见导航对齐:Bootstrap center navbar

---

Center Navbar in Bootstrap
Bootstrap align navbar items to the right