我想创建一个固定在页面底部的引导导航栏，它只包含它所包含的列（col-sm-7）的宽度。导航栏当前跨越了整个页面的宽度，而不仅仅是我想要的中心列！
仅供参考 - 我可以使用afooter，如果它也有效，但不确定我是如何实现它的，我确实用一个页脚替换了导航栏，但页脚没有固定在底部。
以下是fiddle来演示跨越整个页面的导航栏。
以下是带有导航栏的代码
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<style>
/* Set black background color, white text and some padding */
footer {
background-color: #555;
color: white;
padding: 15px;
}
</style>
</head>
<body>
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Logo</a>
</div>
<div class="collapse navbar-collapse" id="myNavbar">
<ul class="nav navbar-nav">
<li class="active"><a href="#">Home</a>
</li>
<li><a href="#">Messages</a>
</li>
</ul>
<form class="navbar-form navbar-right" role="search">
<div class="form-group input-group">
<input type="text" class="form-control" placeholder="Search..">
<span class="input-group-btn">
<button class="btn btn-default" type="button">
<span class="glyphicon glyphicon-search"></span>
</button>
</span>
</div>
</form>
<ul class="nav navbar-nav navbar-right">
<li><a href="#"><span class="glyphicon glyphicon-user"></span> My Account</a>
</li>
</ul>
</div>
</div>
</nav>
<div class="container text-center">
<div class="row">
<div class="col-sm-3 well">
<div class="well">
<p><a href="#">My Profile</a>
</p>
<img src="bird.jpg" class="img-circle" height="65" width="65" alt="Avatar">
</div>
<div class="well">
<p><a href="#">Interests</a>
</p>
<p>
<span class="label label-default">News</span>
<span class="label label-primary">W3Schools</span>
<span class="label label-success">Labels</span>
<span class="label label-info">Football</span>
<span class="label label-warning">Gaming</span>
<span class="label label-danger">Friends</span>
</p>
</div>
<div class="alert alert-success fade in">
<a href="#" class="close" data-dismiss="alert" aria-label="close">×</a>
<p><strong>Ey!</strong>
</p>
People are looking at your profile. Find out who.
</div>
<p><a href="#">Link</a>
</p>
<p><a href="#">Link</a>
</p>
<p><a href="#">Link</a>
</p>
</div>
<div class="col-sm-7">
<div class="row">
<div class="col-sm-12">
<div class="panel panel-default text-left">
<div class="panel-body">
<p contenteditable="true">Status: Feeling Blue</p>
<button type="button" class="btn btn-default btn-sm">
<span class="glyphicon glyphicon-thumbs-up"></span> Like
</button>
</div>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-3">
<div class="well">
<p>John</p>
<img src="bird.jpg" class="img-circle" height="55" width="55" alt="Avatar">
</div>
</div>
<div class="col-sm-9">
<div class="well">
<p>Just Forgot that I had to mention something about someone to someone about how I forgot something, but now I forgot it. Ahh, forget it! Or wait. I remember.... no I don't.</p>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-3">
<div class="well">
<p>Bo</p>
<img src="bandmember.jpg" class="img-circle" height="55" width="55" alt="Avatar">
</div>
</div>
<div class="col-sm-9">
<div class="well">
<p>Just Forgot that I had to mention something about someone to someone about how I forgot something, but now I forgot it. Ahh, forget it! Or wait. I remember.... no I don't.</p>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-3">
<div class="well">
<p>Jane</p>
<img src="bandmember.jpg" class="img-circle" height="55" width="55" alt="Avatar">
</div>
</div>
<div class="col-sm-9">
<div class="well">
<p>Just Forgot that I had to mention something about someone to someone about how I forgot something, but now I forgot it. Ahh, forget it! Or wait. I remember.... no I don't.</p>
</div>
</div>
</div>
<div class="row">
<div class="col-sm-3">
<div class="well">
<p>Anja</p>
<img src="bird.jpg" class="img-circle" height="55" width="55" alt="Avatar">
</div>
</div>
<div class="col-sm-9">
<div class="well">
<p>Just Forgot that I had to mention something about someone to someone about how I forgot something, but now I forgot it. Ahh, forget it! Or wait. I remember.... no I don't.</p>
</div>
</div>
</div>
<div style="border: 1px solid black" class="navbar navbar-fixed-bottom">
<button type="button" class="btn btn-primary">
<span class="glyphicon glyphicon-thumbs-up"></span> Save
</button>
</div>
</div>
<div class="col-sm-2 well">
<div class="thumbnail">
<p>Upcoming Events:</p>
<img src="paris.jpg" alt="Paris" width="400" height="300">
<p><strong>Paris</strong>
</p>
<p>Fri. 27 November 2015</p>
<button class="btn btn-primary">Info</button>
</div>
<div class="well">
<p>ADS</p>
</div>
<div class="well">
<p>ADS</p>
</div>
</div>
</div>
</div>
</body>
</html>