如果你想要首页，功能和定价在左侧紧跟着你的nav-brand，然后登录和注册在右侧，然后包装两个列表在<div>和使用.justify-content-between:

<div class="collapse navbar-collapse justify-content-between">
<ul>....</ul>
<ul>...</ul>
</div>

令人惊讶的是，上面的答案并不适合我，所以下面是我的方法。要使登录和注册导航栏项向右对齐，您可以使用以下两种方法中的任何一种:

扯: 修改用于登录和注册为的无序列表标记 <ul class="navbar-nav - pull-right"> navbar-right: 修改用于登录和注册为的无序列表标记 <ul class="navbar-nav navbar-right">

关于Bootstrap 4

如果你想把品牌对齐到左边，把所有导航栏项对齐到右边，把默认的mr-auto更改为ml-auto

<ul class="navbar-nav ml-auto">

对于Bootstrap 4 beta，元素对齐到右侧的示例导航栏是:

<div id="app" class="container">
  <nav class="navbar navbar-expand-md navbar-light bg-faded">
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon"></span>
    </button>
    <a class="navbar-brand" href="#">Navbar</a>
    <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="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricingg</a>
      </li>
    </ul>
    <ul class="navbar-nav">
      <li class="nav-item">
        <a class="nav-link" href="{{ url('/login') }}">Login</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="{{ url('/register') }}">Register</a>
      </li>
    </ul>
  </nav>
</div>

boostrap 4的变化很小。 要对齐导航栏右侧，你只需要做两个改变。 它们是:

在navbar-nav类添加w-100作为navbar-nav w-100使宽度为100 在nav-item下拉类中添加ml-auto作为nav-item下拉列表ml-auto使左侧空白为auto。

如果你不明白，请参考我附上的图片。

CodePen链接

完整源代码

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarNavDropdown">
    <ul class="navbar-nav w-100">
      <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="#">Features</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Pricing</a>
      </li>
      <li class="nav-item dropdown ml-auto">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown link
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
    </ul>  
  </div>
</nav>

我正在运行Angular 4 (v.4.0.0)和ng-bootstrap (Bootstrap 4)。这些代码并不都是相关的，但希望人们可以选择哪些是有效的。我花了一些时间来找到一个解决方案，让我的物品正确地证明，正确地折叠，并实现下拉我的谷歌(使用OAuth)头像。

<div id="header" class="header">
  <nav class="navbar navbar-toggleable-sm navbar-inverse bg-faded fixed-top">
    <button class="navbar-toggler navbar-toggler-right" 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>
    <a class="navbar-brand" href="#">
          <img alt='Brand' src='../assets/images/logo-white.png' class='navbar-logo-img d-inline-block align-top '>
          <span class="navbar-logo-text">Oncoscape</span>
        </a>
    <div class="collapse navbar-collapse justify-content-end" id="navbarSupportedContent">
      <ul class="navbar-nav float-left">
        <a class="navbar-items nav-item nav-link active " *ngIf='authenticated' (click)='goDashboard()'>
          <span class="fa fa-dashboard"></span>Dashboard
        </a>
        <a class="nav-item nav-link navbar-items active" href="http://resources.sttrcancer.org/oncoscape-contact">
          <span class="fa fa-comments"></span>Feedback
        </a>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
            <img *ngIf='user && authenticated'  class="navbar-pic" src={{user.thumbnail}} alt="Smiley face">
          </a>
          <div *ngIf='user && authenticated' class="dropdown-menu " aria-labelledby="navbarDropdownMenuLink">
            <a class="dropdown-item" (click)="toProfile()">Account</a>
            <div class="dropdown-item">
              <app-login></app-login>
            </div>
          </div>
        </li>
      </ul>
    </div>
  </nav>
</div>
<router-outlet></router-outlet>