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# 顶部导航
- order: 0
一二级导航都在顶部。
9 years ago
顶部导航在页面布局上采用的是上下的结构,一般主导航放置于页面的顶端,从左自右依次为:logo、一级导航项、辅助菜单(用户、设置、通知等)。通常将内容放在固定尺寸(例如:1200px)内,整个页面排版稳定,不受用户终端显示器影响;上下级的结构符合用户上下浏览的习惯,也是较为经典的网站导航模式。页面上下切分的方式提高了主工作区域的信息展示效率,但在纵向空间上会有一些牺牲。此外,由于导航栏水平空间的限制,不适合那些一级导航项很多的信息结构。
> `<BrowserDemo />` 做演示用,无须复制。
---
````jsx
import { Menu, Breadcrumb } from 'antd';
ReactDOM.render(
<BrowserDemo>
<div className="ant-layout-top">
<div className="ant-layout-header">
<div className="ant-layout-wrapper">
<div className="ant-layout-logo"></div>
<Menu theme="dark" mode="horizontal"
defaultSelectedKeys={['2']} style={{lineHeight: '64px'}}>
<Menu.Item key="1">导航一</Menu.Item>
<Menu.Item key="2">导航二</Menu.Item>
<Menu.Item key="3">导航三</Menu.Item>
</Menu>
</div>
</div>
<div className="ant-layout-subheader">
<div className="ant-layout-wrapper">
<Menu mode="horizontal"
defaultSelectedKeys={['1']} style={{marginLeft: 124}}>
<Menu.Item key="1">二级导航</Menu.Item>
<Menu.Item key="2">二级导航</Menu.Item>
<Menu.Item key="3">二级导航</Menu.Item>
</Menu>
</div>
</div>
<div className="ant-layout-wrapper">
<div className="ant-layout-breadcrumb">
<Breadcrumb>
<Breadcrumb.Item>首页</Breadcrumb.Item>
<Breadcrumb.Item>应用列表</Breadcrumb.Item>
<Breadcrumb.Item>某应用</Breadcrumb.Item>
</Breadcrumb>
</div>
<div className="ant-layout-container">
<div style={{ height: 210 }}></div>
</div>
</div>
9 years ago
<div className="ant-layout-footer">
Ant Design 版权所有 © 2015 由蚂蚁金服体验技术部支持
</div>
</div>
</BrowserDemo>
9 years ago
, mountNode);
````
````css
.ant-layout-top {
height: 100%;
}
.ant-layout-top .ant-layout-wrapper {
padding: 0 50px;
}
.ant-layout-top .ant-layout-header {
background: #404040;
height: 64px;
}
.ant-layout-top .ant-layout-logo {
width: 120px;
height: 32px;
background: #333;
border-radius: 6px;
margin: 16px 28px 16px 0;
float: left;
}
.ant-layout-top .ant-layout-subheader {
height: 48px;
9 years ago
border-bottom: 1px solid #e9e9e9;
background: #fff;
}
.ant-layout-top .ant-layout-breadcrumb {
margin: 7px 0 -17px 24px;
}
.ant-layout-top .ant-layout-container {
background: #fff;
margin: 24px 0 0;
position: relative;
padding-top: 24px;
overflow: hidden;
9 years ago
}
9 years ago
.ant-layout-top .ant-layout-footer {
height; 64px;
line-height: 64px;
9 years ago
text-align: center;
font-size: 12px;
color: #999;
}
9 years ago
````