在bootstrap-4中将导航项对齐到右侧

我只是切换到bootstrap 4和重做我所有的html和scss与它一起工作，我似乎不知道如何把一组导航项在导航栏的右侧。这是我的导航条码:

<nav class="navbar navbar-full navbar-dark bg-primary">
<button class="navbar-toggler hidden-md-up" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation"></button>
<%= link_to "Living Recipe", recipes_path(sort_attribut: "popularity", sort_order: :desc), class: "navbar-brand" %>
<div class="collapse navbar-toggleable-sm" id="navbarResponsive">
<ul class="nav navbar-nav float-md-left">
<li class="nav-item">
<%= form_tag(recipes_path, :method => "get", id: "search-form", class: "form-inline") do %>
<%= text_field_tag :search, params[:search], placeholder: "Search Recipes", class: "form-control col-md-8" %>
<% end %>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="responsiveNavbarDropdown" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Browse</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Popular", recipes_path(sort_attribute: "popularity", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Newest", recipes_path(sort_attribute: "created_at", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Updated", recipes_path(sort_attribute: "most_active", sort_order: :desc), class: "dropdown-item" %>
<%= link_to "Most Saved", recipes_path(sort_attribute: "save_count", sort_order: :desc), class: "dropdown-item" %>
</div>
</li>
</ul>
<ul class="nav navbar-nav float-md-right">
<% if user_signed_in? %>
<li class="dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
<%= current_user.displayname.present? ? "D-ring" : current_user.firstname %>
</a>
<div class="dropdown-menu" aria-labelledby="responsiveNavbarDropdown">
<%= link_to "Profile", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Recipe Box", user_saved_recipes_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Add Recipe", new_recipe_path, class: "dropdown-item" %>
<%= link_to "Submitted Recipes", user_path(current_user.id), class: "dropdown-item" %>
<%= link_to "Sign Out", destroy_user_session_path, :method => :delete, class: "dropdown-item" %>
</div>
</li>
<% else %>
<li class="nav-item">
<%= link_to "Create Account", '', data: {:'toggle' => 'modal', :'target' => '#signupModal'}, class: "nav-link" %>
</li>
<li class="nav-item">
<%= link_to "Login", '', data: {:'toggle' => 'modal', :'target' => '#loginModal'}, class: "nav-link" %>
</li>
<% end %>
</ul>
</div>
</nav>

这是它的截图

enter image description here

535026 次浏览
小开
最佳答案

TL;博士:

为你想要在右侧的导航栏项创建另一个<ul class="navbar-nav ml-auto">。
ml-auto将把你的navbar-nav拉到右边，而mr-auto将把它拉到左边

根据引导程序v4.5.2进行测试

<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"/>
<style>
/* Stackoverflow preview fix, please ignore */
.navbar-nav {
flex-direction: row;
}
    

.nav-link {
padding-right: .5rem !important;
padding-left: .5rem !important;
}
    

/* Fixes dropdown menus placed on the right side */
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}
</style>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-dark bg-primary rounded">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link">Left Link 1</a>
</li>
<li class="nav-item">
<a class="nav-link">Left Link 2</a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link">Right Link 1</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 on Right</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action with a lot of text inside of an item</a>
</div>
</li>
</ul>
</nav>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
</body>
</html>

正如你所看到的，额外的样式规则已经添加到Stackoverflows预览框中，以解决一些奇怪的问题。
在你的项目中，你应该可以安全地忽略这些规则

从v4.0.0开始，这似乎是官方的方式。

我修改了帖子，包括一个下拉菜单放在导航栏的右侧，正如@Bruno所建议的那样。它需要将其left和right属性颠倒。我在示例代码的开头添加了一个额外的css代码片段。
请注意，当您单击Run code snippet按钮时，示例将显示移动版本。要查看桌面版本，必须单击Expand snippet按钮 
.ml-auto .dropdown-menu {
left: auto !important;
right: 0px;
}

在样式表中包含这一点就可以了。

小开

这对6是成立的。关键是左侧导航上的类“mr-auto”，它将把右侧导航推到右边。你还需要添加navbar-toggleable-md，否则它将堆叠在一列而不是一行中。注意，我没有添加剩余的切换项(例如切换按钮)，我添加了足够的内容，以使其按照要求格式化。这里有更完整的例子https://v4-alpha.getbootstrap.com/examples/navbars/。

<!DOCTYPE html>
<html lang="en">
<head>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" rel="stylesheet" />
</head>
<body>
<nav class="navbar navbar-toggleable-md navbar-light bg-faded">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
<ul class="nav navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home</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>
<ul class="nav navbar-nav">
<li class="nav-item">
<a class="nav-link" href="#">Link on the Right</a>
</li>
</ul>
</div>
</nav>
</body>
小开

在上一个版本中，它更简单。只需在ul中放入一个ml-auto类，如下所示:

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

使用Bootstrap v4.0.0-alpha。6:两个__abc0 (.navbar-na)，一个带有.mr-auto，一个带有.ml-auto:

<nav ...>
...
<div class="collapse navbar-collapse">
<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="#">Left Link </a>
</li>
</ul>
<ul class="navbar-nav ml-auto">
<li class="nav-item">
<a class="nav-link" href="#">Right Link </a>
</li>
</ul>
</div>
</nav>
小开

在Bootstrap 4 alpha-6版本中，由于导航栏使用flex模型，您可以在父div中使用justify-content-end并删除mr-auto。

<div class="collapse navbar-collapse justify-content-end" id="navbarText">
<ul class="navbar-nav">
<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">
<a class="nav-link disabled" href="#">Disabled</a>
</li>
</ul>
</div>

这就像一个咒语一样:)

小开

在我的情况下，我正在寻找一个解决方案，允许导航栏项目的一个右对齐。为了做到这一点，你必须将style="width:100%;"添加到<ul class="navbar-nav">中，而然后将ml-auto类添加到导航栏项中。

小开

Navbar expanded

Navbar collapse

我有一个工作的代码依赖，左对齐和右对齐的导航链接，它们都折叠成一个响应式菜单，在父标记上使用.justify-content-between: https://codepen.io/epan/pen/bREVVW?editors=1000

<nav class="navbar navbar-toggleable-sm navbar-inverse bg-inverse">
<button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbar"     aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Acme</a>
<div class="collapse navbar-collapse justify-content-between" id="navbar">
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Ball Bearings</a>
<a class="nav-item nav-link" href="#">TNT Boxes</a>
</div>
<div class="navbar-nav">
<a class="nav-item nav-link" href="#">Logout</a>
</div>
</div>
</nav>
小开

这里和简单的例子。

<!-- Navigation bar-->


<nav class="navbar navbar-toggleable-md bg-info navbar-inverse">
<div class="container">
<button class="navbar-toggler" data-toggle="collapse" data-target="#mainMenu">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="mainMenu">
<div class="navbar-nav ml-auto " style="width:100%">
<a class="nav-item nav-link active" href="#">Home</a>
<a class="nav-item nav-link" href="#">About</a>
<a class="nav-item nav-link" href="#">Training</a>
<a class="nav-item nav-link" href="#">Contact</a>
</div>
</div>
</div>
</nav>

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