Dropdown下拉菜单
向下弹出的列表。
何时使用#
当页面上的操作命令过多时,用此组件可以收纳操作元素。点击或移入触点,会出现一个下拉菜单。可在列表中进行选择,并执行相应的命令。
代码演示
import { Menu, Dropdown, Icon } from 'antd';
const menu = (
<Menu>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.alipay.com/">1st menu item</a>
</Menu.Item>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.taobao.com/">2nd menu item</a>
</Menu.Item>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.tmall.com/">3rd menu item</a>
</Menu.Item>
</Menu>
);
ReactDOM.render(
<Dropdown overlay={menu}>
<a className="ant-dropdown-link" href="#">
Hover me <Icon type="down" />
</a>
</Dropdown>
, mountNode);
import { Menu, Dropdown, Icon } from 'antd';
const menu = (
<Menu>
<Menu.Item key="0">
<a target="_blank" rel="noopener noreferrer" href="http://www.alipay.com/">1st menu item</a>
</Menu.Item>
<Menu.Item key="1">
<a target="_blank" rel="noopener noreferrer" href="http://www.taobao.com/">2nd menu item</a>
</Menu.Item>
<Menu.Divider />
<Menu.Item key="3" disabled>3rd menu item(disabled)</Menu.Item>
</Menu>
);
ReactDOM.render(
<Dropdown overlay={menu}>
<a className="ant-dropdown-link" href="#">
Hover me <Icon type="down" />
</a>
</Dropdown>
, mountNode);
import { Menu, Dropdown, Icon, message } from 'antd';
const onClick = function ({ key }) {
message.info(`Click on item ${key}`);
};
const menu = (
<Menu onClick={onClick}>
<Menu.Item key="1">1st menu item</Menu.Item>
<Menu.Item key="2">2nd memu item</Menu.Item>
<Menu.Item key="3">3rd menu item</Menu.Item>
</Menu>
);
ReactDOM.render(
<Dropdown overlay={menu}>
<a className="ant-dropdown-link" href="#">
Hover me, Click menu item <Icon type="down" />
</a>
</Dropdown>
, mountNode);
import { Menu, Dropdown, Button } from 'antd';
const menu = (
<Menu>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.alipay.com/">1st menu item</a>
</Menu.Item>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.taobao.com/">2nd menu item</a>
</Menu.Item>
<Menu.Item>
<a target="_blank" rel="noopener noreferrer" href="http://www.tmall.com/">3rd menu item</a>
</Menu.Item>
</Menu>
);
ReactDOM.render(
<div>
<Dropdown overlay={menu} placement="bottomLeft">
<Button>bottomLeft</Button>
</Dropdown>
<Dropdown overlay={menu} placement="bottomCenter">
<Button>bottomCenter</Button>
</Dropdown>
<Dropdown overlay={menu} placement="bottomRight">
<Button>bottomRight</Button>
</Dropdown>
<br />
<Dropdown overlay={menu} placement="topLeft">
<Button>topLeft</Button>
</Dropdown>
<Dropdown overlay={menu} placement="topCenter">
<Button>topCenter</Button>
</Dropdown>
<Dropdown overlay={menu} placement="topRight">
<Button>topRight</Button>
</Dropdown>
</div>
, mountNode);
#components-dropdown-demo-placement .ant-btn {
margin-right: 8px;
margin-bottom: 8px;
}
import { Menu, Dropdown, Icon } from 'antd';
const menu = (
<Menu>
<Menu.Item key="0">
<a href="http://www.alipay.com/">1st menu item</a>
</Menu.Item>
<Menu.Item key="1">
<a href="http://www.taobao.com/">2nd menu item</a>
</Menu.Item>
<Menu.Divider />
<Menu.Item key="3">3rd menu item</Menu.Item>
</Menu>
);
ReactDOM.render(
<Dropdown overlay={menu} trigger={['click']}>
<a className="ant-dropdown-link" href="#">
Click me <Icon type="down" />
</a>
</Dropdown>
, mountNode);
import { Menu, Dropdown, Button, Icon, message } from 'antd';
function handleButtonClick(e) {
message.info('Click on left button.');
console.log('click left button', e);
}
function handleMenuClick(e) {
message.info('Click on menu item.');
console.log('click', e);
}
const menu = (
<Menu onClick={handleMenuClick}>
<Menu.Item key="1">1st menu item</Menu.Item>
<Menu.Item key="2">2nd menu item</Menu.Item>
<Menu.Item key="3">3rd item</Menu.Item>
</Menu>
);
ReactDOM.render(
<div>
<Dropdown.Button onClick={handleButtonClick} overlay={menu}>
Dropdown
</Dropdown.Button>
<Dropdown.Button
onClick={handleButtonClick}
overlay={menu}
disabled
style={{ marginLeft: 8 }}
>
Dropdown
</Dropdown.Button>
<Dropdown overlay={menu}>
<Button style={{ marginLeft: 8 }}>
Button <Icon type="down" />
</Button>
</Dropdown>
</div>
, mountNode);
import { Menu, Dropdown, Icon } from 'antd';
class OverlayVisible extends React.Component {
state = {
visible: false,
};
handleMenuClick = (e) => {
if (e.key === '3') {
this.setState({ visible: false });
}
}
handleVisibleChange = (flag) => {
this.setState({ visible: flag });
}
render() {
const menu = (
<Menu onClick={this.handleMenuClick}>
<Menu.Item key="1">Clicking me will not close the menu.</Menu.Item>
<Menu.Item key="2">Clicking me will not close the menu also.</Menu.Item>
<Menu.Item key="3">Clicking me will close the menu</Menu.Item>
</Menu>
);
return (
<Dropdown overlay={menu}
onVisibleChange={this.handleVisibleChange}
visible={this.state.visible}
>
<a className="ant-dropdown-link" href="#">
Hover me <Icon type="down" />
</a>
</Dropdown>
);
}
}
ReactDOM.render(<OverlayVisible />, mountNode);
API#
属性如下
参数 | 说明 | 类型 | 默认值 |
---|---|---|---|
disabled | 菜单是否禁用 | boolean | - |
getPopupContainer | 菜单渲染父节点。默认渲染到 body 上,如果你遇到菜单滚动定位问题,试试修改为滚动的区域,并相对其定位。示例 | Function(triggerNode) | () => document.body |
overlay | 菜单 | Menu | - |
placement | 菜单弹出位置:bottomLeft bottomCenter bottomRight topLeft topCenter topRight | String | bottomLeft |
trigger | 触发下拉的行为 | Array<'click'|'hover'> | 'hover' |
visible | 菜单是否显示 | boolean | - |
onVisibleChange | 菜单显示状态改变时调用,参数为 visible | Function(visible) | - |
overlay
菜单使用 Menu,还包括菜单项 Menu.Item
,分割线 Menu.Divider
。
注意: Menu.Item 必须设置唯一的 key 属性。
Dropdown 下的 Menu 默认不可选中。如果需要菜单可选中,可以指定
<Menu selectable>
.
Dropdown.Button#
参数 | 说明 | 类型 | 默认值 |
---|---|---|---|
disabled | 菜单是否禁用 | boolean | - |
overlay | 菜单 | Menu | - |
placement | 菜单弹出位置:bottomLeft bottomCenter bottomRight topLeft topCenter topRight | String | bottomLeft |
size | 按钮大小,和 Button 一致 | string | 'default' |
trigger | 触发下拉的行为 | Array<'click'|'hover'> | 'hover' |
type | 按钮类型,和 Button 一致 | string | 'default' |
visible | 菜单是否显示 | boolean | - |
onClick | 点击左侧按钮的回调,和 Button 一致 | Function | - |
onVisibleChange | 菜单显示状态改变时调用,参数为 visible | Function | - |