如何在 Bootstrap 4 Beta 导航栏中居中元素?

Question

我想在大屏幕上居中导航栏品牌。 我不明白我做错了什么，我该怎么办？ .请帮忙！ 我想要这样的东西：https://www.codeply.com/go/6P65Rawdw4/bootstrap-4-navbar-center-links-examples.

<nav class="navbar fixed-top navbar-expand-sm navbar-light " id="MyNavControl">
<a class="navbar-brand mx-auto" href="#home">BRAND BRAND</a>
<button class="navbar-toggler" 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>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link active" href="#home">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#AboutSection">About</a>
</li>
</ul>
<form class="ml-auto">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
</form>
</div>  
</nav>

Answer 1

评论后更新试试这个

<nav class="navbar fixed-top navbar-expand-sm navbar-light " id="MyNavControl">
<a class="navbar-brand mx-auto" href="#home">BRAND BRAND</a>
<button class="navbar-toggler" 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>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mx-auto">
<li class="nav-item">
<a class="nav-link active" href="#home">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#AboutSection">About</a>
</li>
</ul>
</div>  
<form class="ml-auto">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
</form>
</nav>

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css">
<nav class="navbar fixed-top navbar-expand-sm navbar-light " id="MyNavControl">
<a class="navbar-brand mx-auto" href="#home">BRAND BRAND</a>
<button class="navbar-toggler" 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>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mx-auto">
<li class="nav-item">
<a class="nav-link active" href="#home">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#AboutSection">About</a>
</li>
</ul>
</div>  
<form class="ml-auto">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
</form>
</nav>