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访问admin.php的admin模块的index控制器的index方法，代码如下
class IndexController extends Controller {
public function index(){
layout(false);
$this->display();
}
public function info(){
$this->display();
}
}
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index/index.html代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="renderer" content="webkit">
<title>H+ 后台主题UI框架 - 主页</title>
<meta name="keywords" content="H+后台主题,后台bootstrap框架,会员中心主题,后台HTML,响应式后台">
<meta name="description" content="H+是一个完全响应式，基于Bootstrap3最新版本开发的扁平化主题，她采用了主流的左右两栏式布局，使用了Html5+CSS3等现代技术">
<!--[if lt IE 9]>
<meta http-equiv="refresh" content="0;ie.html" />
<![endif]-->
<link rel="shortcut icon" href="__HP__/img/favicon.ico">
<link href="__HP__/css/bootstrap.min.css?v=3.3.6" rel="stylesheet">
<link href="__HP__/css/font-awesome.min.css?v=4.4.0" rel="stylesheet">
<link href="__HP__/css/animate.css" rel="stylesheet">
<link href="__HP__/css/style.css?v=4.1.0" rel="stylesheet">
</head>
<body class="fixed-sidebar full-height-layout gray-bg" style="overflow:hidden">
<p id="wrapper">
<!--左侧导航开始-->
<include file="Common:menu" />
<!--左侧导航结束-->
<!--右侧部分开始-->
<p id="page-wrapper" class="gray-bg dashbard-1" style="margin: 0 0 0 220px">
<p class="row content-tabs">
<button class="roll-nav roll-left J_tabLeft"><i class="fa fa-backward"></i>
</button>
<nav class="page-tabs J_menuTabs">
<p class="page-tabs-content">
<a href="javascript:;" class="active J_menuTab" data-id="#">首页</a>
</p>
</nav>
<button class="roll-nav roll-right J_tabRight"><i class="fa fa-forward"></i>
</button>
<p class="btn-group roll-nav roll-right">
<button class="dropdown J_tabClose" data-toggle="dropdown">关闭操作<span class="caret"></span>
</button>
<ul role="menu" class="dropdown-menu dropdown-menu-right">
<li class="J_tabShowActive"><a>定位当前选项卡</a>
</li>
<li class="pider"></li>
<li class="J_tabCloseAll"><a>关闭全部选项卡</a>
</li>
<li class="J_tabCloseOther"><a>关闭其他选项卡</a>
</li>
</ul>
</p>
<a href="login.html" class="roll-nav roll-right J_tabExit"><i class="fa fa fa-sign-out"></i> 退出</a>
</p>
<p class="row J_mainContent" id="content-main" >
<iframe class="J_iframe" name="iframe0" width="100%" height="100%" src="{:U('index/info')}" frameborder="0" data-id="index_v1.html" seamless></iframe>
</p>
</p>
<!--右侧部分结束-->
</p>
<!-- 全局js -->
<script src="__HP__/js/jquery.min.js?v=2.1.4"></script>
<script src="__HP__/js/bootstrap.min.js?v=3.3.6"></script>
<script src="__HP__/js/plugins/metisMenu/jquery.metisMenu.js"></script>
<script src="__HP__/js/plugins/slimscroll/jquery.slimscroll.min.js"></script>
<script src="__HP__/js/plugins/layer/layer.min.js"></script>
<!-- 自定义js -->
<script src="__HP__/js/hplus.js?v=4.1.0"></script>
<script type="text/javascript" src="__HP__/js/contabs.js"></script>
<!-- 第三方插件 -->
<script src="__HP__/js/plugins/pace/pace.min.js"></script>
</body>
</html>
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Common/menu.html代码如下：
<nav class="navbar-default navbar-static-side" role="navigation">
<p class="nav-close"><i class="fa fa-times-circle"></i>
</p>
<p class="sidebar-collapse">
<ul class="nav" id="side-menu">
<li class="nav-header">
<p class="dropdown profile-element">
<span><img alt="image" class="img-circle" src="__HP__/img/profile_small.jpg" /></span>
<a data-toggle="dropdown" class="dropdown-toggle" href="#">
<span class="clear">
<span class="block m-t-xs"><strong class="font-bold">Beaut-zihan</strong></span>
<span class="text-muted text-xs block">超级管理员<b class="caret"></b></span>
</span>
</a>
<ul class="dropdown-menu animated fadeInRight m-t-xs">
<li><a class="J_menuItem" href="form_avatar.html">修改头像</a>
</li>
<li><a class="J_menuItem" href="profile.html">个人资料</a>
</li>
<li><a class="J_menuItem" href="contacts.html">联系我们</a>
</li>
<li><a class="J_menuItem" href="mailbox.html">信箱</a>
</li>
<li class="pider"></li>
<li><a href="login.html">安全退出</a>
</li>
</ul>
</p>
<p class="logo-element">H+
</p>
</li>
<li>
<a href="#">
<i class="fa fa-home"></i>
<span class="nav-label">站点管理</span>
<span class="fa arrow"></span>
</a>
<ul class="nav nav-second-level">
<li>
<a class="J_menuItem" href="{:U('email/index')}">邮箱配置</a>
</li>
</ul>
</li>
<li>
<a href="#">
<i class="fa fa-user"></i>
<span class="nav-label">用户管理</span>
<span class="fa arrow"></span>
</a>
<ul class="nav nav-second-level">
<li>
<a class="J_menuItem" href="{:U('user/index')}">用户列表</a>
</li>
</ul>
</li>
</ul>
</p>
</nav>
index/index.html在代码中关闭了模板解析。所以直接出这个页面，然后里面加载了index控制器的info方法。info方法会先加载layout.html，然后加载index/info.html
![[Web フロントエンド] Node.js クイック スタート](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
你看一下你的body高度是多少