主标题组件
提醒！
AdminLTE 使用了 Bootstrap 4 的所有组件。建议先浏览 Bootstrap 文档，了解本文档**未涵盖**的各种组件。
提示！
如果您浏览示例页面并想复制某个组件，请右键单击该组件并选择“检查元素”，这样比扫描 HTML 页面更快地找到 HTML 代码。
主标题包含导航栏。导航栏的构建方式与 Bootstrap 略有不同，因为它包含 Bootstrap 未提供的组件。导航栏可以通过两种方式构建。这是一个普通导航栏的示例，接下来我们将提供一个带有徽标的顶部导航布局示例。
<!-- Navbar -->
<nav class="main-header navbar navbar-expand navbar-white navbar-light">
<!-- Left navbar links -->
<ul class="navbar-nav">
<li class="nav-item">
<a class="nav-link" data-widget="pushmenu" href="#" role="button"><i class="fas fa-bars"></i></a>
</li>
<li class="nav-item d-none d-sm-inline-block">
<a href="index3.html" class="nav-link">Home</a>
</li>
<li class="nav-item d-none d-sm-inline-block">
<a href="#" class="nav-link">Contact</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown2" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Help
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown2">
<a class="dropdown-item" href="#">FAQ</a>
<a class="dropdown-item" href="#">Support</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Contact</a>
</div>
</li>
</ul>
<!-- SEARCH FORM -->
<form class="form-inline ml-3">
<div class="input-group input-group-sm">
<input class="form-control form-control-navbar" type="search" placeholder="Search" aria-label="Search">
<div class="input-group-append">
<button class="btn btn-navbar" type="submit">
<i class="fas fa-search"></i>
</button>
</div>
</div>
</form>
<!-- Right navbar links -->
<ul class="navbar-nav ml-auto">
<!-- Messages Dropdown Menu -->
<li class="nav-item dropdown">
<a class="nav-link" data-toggle="dropdown" href="#">
<i class="far fa-comments"></i>
<span class="badge badge-danger navbar-badge">3</span>
</a>
<div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user1-128x128.jpg" alt="User Avatar" class="img-size-50 mr-3 img-circle">
<div class="media-body">
<h3 class="dropdown-item-title">
Brad Diesel
<span class="float-right text-sm text-danger"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">Call me whenever you can...</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user8-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">
<div class="media-body">
<h3 class="dropdown-item-title">
John Pierce
<span class="float-right text-sm text-muted"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">I got your message bro</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user3-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">
<div class="media-body">
<h3 class="dropdown-item-title">
Nora Silvester
<span class="float-right text-sm text-warning"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">The subject goes here</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item dropdown-footer">See All Messages</a>
</div>
</li>
<!-- Notifications Dropdown Menu -->
<li class="nav-item dropdown">
<a class="nav-link" data-toggle="dropdown" href="#">
<i class="far fa-bell"></i>
<span class="badge badge-warning navbar-badge">15</span>
</a>
<div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">
<span class="dropdown-header">15 Notifications</span>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-envelope mr-2"></i> 4 new messages
<span class="float-right text-muted text-sm">3 mins</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-users mr-2"></i> 8 friend requests
<span class="float-right text-muted text-sm">12 hours</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-file mr-2"></i> 3 new reports
<span class="float-right text-muted text-sm">2 days</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item dropdown-footer">See All Notifications</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" data-widget="control-sidebar" data-slide="true" href="#" role="button"><i
class="fas fa-th-large"></i></a>
</li>
</ul>
</nav>
<!-- /.navbar -->
顶部导航布局。主标题示例。
提醒！
要使用此主标题而不是常规主标题，您必须在 body 标签中添加
layout-top-nav类。
顶部导航栏示例可以在此 演示页面 中找到。
<!-- Navbar -->
<nav class="main-header navbar navbar-expand navbar-light navbar-white">
<div class="container">
<a href="index3.html" class="navbar-brand">
<img src="dist/img/AdminLTELogo.png" alt="AdminLTE Logo" class="brand-image img-circle elevation-3"
style="opacity: .8">
<span class="brand-text font-weight-light">AdminLTE 3</span>
</a>
<!-- Left navbar links -->
<ul class="navbar-nav">
<li class="nav-item">
</li>
<li class="nav-item d-none d-sm-inline-block">
<a href="index3.html" class="nav-link">Home</a>
</li>
<li class="nav-item d-none d-sm-inline-block">
<a href="#" class="nav-link">Contact</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown4" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
Help
</a>
<div class="dropdown-menu" aria-labelledby="navbarDropdown4">
<a class="dropdown-item" href="#">FAQ</a>
<a class="dropdown-item" href="#">Support</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Contact</a>
</div>
</li>
</ul>
<!-- SEARCH FORM -->
<form class="form-inline ml-3">
<div class="input-group input-group-sm">
<input class="form-control form-control-navbar" type="search" placeholder="Search" aria-label="Search">
<div class="input-group-append">
<button class="btn btn-navbar" type="submit">
<i class="fas fa-search"></i>
</button>
</div>
</div>
</form>
<!-- Right navbar links -->
<ul class="navbar-nav ml-auto">
<!-- Messages Dropdown Menu -->
<li class="nav-item dropdown">
<a class="nav-link" data-toggle="dropdown" href="#">
<i class="fas fa-comments"></i>
<span class="badge badge-danger navbar-badge">3</span>
</a>
<div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user1-128x128.jpg" alt="User Avatar" class="img-size-50 mr-3 img-circle">
<div class="media-body">
<h3 class="dropdown-item-title">
Brad Diesel
<span class="float-right text-sm text-danger"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">Call me whenever you can...</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user8-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">
<div class="media-body">
<h3 class="dropdown-item-title">
John Pierce
<span class="float-right text-sm text-muted"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">I got your message bro</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<!-- Message Start -->
<div class="media">
<img src="dist/img/user3-128x128.jpg" alt="User Avatar" class="img-size-50 img-circle mr-3">
<div class="media-body">
<h3 class="dropdown-item-title">
Nora Silvester
<span class="float-right text-sm text-warning"><i class="fas fa-star"></i></span>
</h3>
<p class="text-sm">The subject goes here</p>
<p class="text-sm text-muted"><i class="far fa-clock mr-1"></i> 4 Hours Ago</p>
</div>
</div>
<!-- Message End -->
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item dropdown-footer">See All Messages</a>
</div>
</li>
<!-- Notifications Dropdown Menu -->
<li class="nav-item dropdown">
<a class="nav-link" data-toggle="dropdown" href="#">
<i class="far fa-bell"></i>
<span class="badge badge-warning navbar-badge">15</span>
</a>
<div class="dropdown-menu dropdown-menu-lg dropdown-menu-right">
<span class="dropdown-header">15 Notifications</span>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-envelope mr-2"></i> 4 new messages
<span class="float-right text-muted text-sm">3 mins</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-users mr-2"></i> 8 friend requests
<span class="float-right text-muted text-sm">12 hours</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item">
<i class="fas fa-file mr-2"></i> 3 new reports
<span class="float-right text-muted text-sm">2 days</span>
</a>
<div class="dropdown-divider"></div>
<a href="#" class="dropdown-item dropdown-footer">See All Notifications</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" data-widget="control-sidebar" data-slide="true" href="#" role="button"><i
class="fas fa-th-large"></i></a>
</li>
</ul>
</div>
</nav>
<!-- /.navbar -->
提示！
要获得更大的下拉菜单，可以在
.dropdown-menu中添加.dropdown-menu-lg或.dropdown-menu-xl。您还可以通过在.main-header中添加.dropdown-legacy来获得传统的下拉菜单偏移。