这一篇内容较为简单 主要是修改app.blade.php，实现下拉菜单需要引入jQuery和js：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Laravel App</title>
<link rel="stylesheet" href="/css/bootstrap.css">
{{--引入fontawesome--}}
<link rel="stylesheet" href="/css/font-awesome.css">
</head>
<body>
<div>
<!-- Static navbar -->
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Laravel-App</a>
</div>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="/">首页</a></li>
</ul>
<ul class="nav navbar-nav navbar-right">
@if(\Auth::check())
<li>
<a id="dLabel" type="button" data-toggle="dropdown" aria-haspopup="true">{{ \Auth::user()->name }}</a>
<!-- 增加下拉菜单 -->
<ul class="dropdown-menu" aria-labelledby="dLabel">
<li><a href="#"><i class="fa fa-user"></i> 更换头像</a></li>
<li><a href="#"><i class="fa fa-cog"></i> 更换密码</a></li>
<li><a href="#"><i class="fa fa-heart"></i> 特别鸣谢</a></li>
<li role="separator" class="divider"></li>
<li><a href="/user/logout"><i class="fa fa-sign-out"></i> 退出登录</a></li>
</ul>
</li>
{{-- 添加用户头像--}}
<li><img src="{{ \Auth::user()->avatar }}" alt="64x64" class="img-circle" style="width: 50px; height: 50px";></li>
@else
<li><a href="/user/login">登 录</a></li>
<li><a href="/user/register">注 册</a></li>
@endif
</ul>
</div><!--/.nav-collapse -->
</div><!--/.container-fluid -->
</nav>
</div>
@yield('content')
{{-- 引入js 和 jquery --}}
<script src="//cdn.bootcss.com/jquery/3.0.0-alpha1/jquery.min.js"></script>
<script src="//cdn.bootcss.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
</body>
</html>