# 底部导航

- 页面: https://jiguang132.com/zh/resources/material-ui/docs/bottom-navigation
- 资源: Material UI (https://jiguang132.com/zh/resources/material-ui.md)
- 全部指南: https://jiguang132.com/zh/resources/material-ui/docs.md

在紧凑屏幕上切换少量主要目的地。

本指南覆盖默认 Emotion 环境的 Material UI Core；扩展包与额外示例按清单单独标注。

## 使用场景与业务边界

选中值不会自行跳转；连接真实路由时保留原生键盘行为。

## 原生组成与范围

`BottomNavigation`, `BottomNavigationAction`

保持 Material UI 原生组合与类型，不替换为 JGuang／Base UI／Radix 同名 API。示例条目不是额外组件。

## 原生安装与初始化

```bash
npm install @mui/material@9.4.0 @emotion/react@11.14.0 @emotion/styled@11.14.1
```

采用原生 npm 包与 Emotion，不提供虚构的 JGuang UI Registry 地址。将示例放在原生 ThemeProvider 内，按项目选择 CssBaseline 或 ScopedCssBaseline。先检查 React、现有 Provider、锁文件与 SSR 配置；不要覆盖用户文件或忽略 peer 冲突。本批实际验收 React 19.2.8；React 18 及以下须匹配 react-is。完整初始化规则见随附的双语 setup 文档。

## 关键原生参数

仅解释本指南选出的关键参数，不是平铺的通用 API。原生继承来源、slot 结构、可空值与泛型仍按固定源码保留。

| 所属组件.属性 | 用途说明 | 声明来源 |
| --- | --- | --- |
| `BottomNavigation.value` | 受控原生值，其单值／数组／可空类型取决于所属组件。 | `BottomNavigation` |
| `BottomNavigation.onChange` | 所属控件的原生回调，保留其准确事件／数值／可空签名。 | `BottomNavigation` |
| `BottomNavigation.showLabels` | 让 BottomNavigation 的所有标签保持可见，而非仅选中项。 | `BottomNavigation` |
| `BottomNavigationAction.label` | 原生可见标签／内容，不一定是底层值。 | `BottomNavigationAction` |

## 可运行原生示例

下列机器键只选择示例入口，不会作为通用 variant 属性传入每个组件。原生示例 JSX 与数据保持上游原文；JGuang 编写的验收示例明确标注。

- 底部导航 · `SimpleBottomNavigation` · 上游原生示例
- 不显示全部标签的底部导航 · `LabelBottomNavigation` · 上游原生示例
- 固定定位 · `FixedBottomNavigation` · 上游原生示例

## 真实使用示例

固定版本的未修改原生示例；复制时同时保留所需的局部辅助文件。

```tsx
import * as React from 'react';
import Box from '@mui/material/Box';
import BottomNavigation from '@mui/material/BottomNavigation';
import BottomNavigationAction from '@mui/material/BottomNavigationAction';
import RestoreIcon from '@mui/icons-material/Restore';
import FavoriteIcon from '@mui/icons-material/Favorite';
import LocationOnIcon from '@mui/icons-material/LocationOn';

export default function SimpleBottomNavigation() {
  const [value, setValue] = React.useState(0);

  return (
    <Box sx={{ width: 500 }}>
      <BottomNavigation
        showLabels
        value={value}
        onChange={(event, newValue) => {
          setValue(newValue);
        }}
      >
        <BottomNavigationAction label="Recents" icon={<RestoreIcon />} />
        <BottomNavigationAction label="Favorites" icon={<FavoriteIcon />} />
        <BottomNavigationAction label="Nearby" icon={<LocationOnIcon />} />
      </BottomNavigation>
    </Box>
  );
}

```

## 示例依赖边界

`react`, `@mui/material/Box`, `@mui/material/BottomNavigation`, `@mui/material/BottomNavigationAction`, `@mui/icons-material/Restore`, `@mui/icons-material/Favorite`, `@mui/icons-material/LocationOn`, `@mui/icons-material/Folder`, `@mui/material/CssBaseline`, `@mui/icons-material/Archive`, `@mui/material/Paper`, `@mui/material/List`, `@mui/material/ListItemButton`, `@mui/material/ListItemAvatar`, `@mui/material/ListItemText`, `@mui/material/Avatar`

直接导入 Icons／System／Utils 的示例需要匹配 9.4.0 包。局部数据与辅助文件属于示例闭包，不是额外组件。远程图片和模拟操作不提供后端。

## 固定上游 API 元数据参考

以下表格保留上游元数据，不是重新推断的通用类型体系。条件泛型、继承属性与回调细节以以下源码声明为准。主题默认配置可能覆盖元数据默认值。

### BottomNavigation

```tsx
import BottomNavigation from '@mui/material/BottomNavigation';
import { BottomNavigation } from '@mui/material';
```

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `children` | 否 | `node` | — |
| `classes` | 否 | `object` | — |
| `component` | 否 | `elementType` | — |
| `onChange` | 否 | `func` | — |
| `showLabels` | 否 | `bool` | `false` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |
| `value` | 否 | `any` | — |



### BottomNavigationAction

```tsx
import BottomNavigationAction from '@mui/material/BottomNavigationAction';
import { BottomNavigationAction } from '@mui/material';
```

原生继承: `ButtonBase`. 父级与 DOM 属性未被伪造为本组件新属性。

| 属性 | 必需 | 上游元数据类型／约束 | 元数据默认值 |
| --- | --- | --- | --- |
| `children` | 否 | `unsupportedProp` | — |
| `classes` | 否 | `object` | — |
| `icon` | 否 | `node` | — |
| `label` | 否 | `node` | — |
| `showLabel` | 否 | `bool` | — |
| `slotProps` | 否 | `{ label?: func \| object, root?: func \| object }` | `{}` |
| `slots` | 否 | `{ label?: elementType, root?: elementType }` | `{}` |
| `sx` | 否 | `Array<func \| object \| bool> \| func \| object` | — |
| `value` | 否 | `any` | — |


## 原生源码声明

声明与 import 从固定源码提取，不平铺联合类型或外部继承。英文注释／类型属于原始源码参考，不代表上游正文已全文翻译。共享类型仍位于原生包中。

### vendor/src/BottomNavigation/BottomNavigation.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { Theme } from '../styles';

import { OverridableComponent, OverrideProps } from '../OverridableComponent';

import { BottomNavigationClasses } from './bottomNavigationClasses';

export interface BottomNavigationOwnProps {
  /**
   * The content of the component.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<BottomNavigationClasses> | undefined;
  /**
   * Callback fired when the value changes.
   *
   * @param {React.SyntheticEvent} event The event source of the callback. **Warning**: This is a generic event not a change event.
   * @param {any} value We default to the index of the child.
   */
  onChange?: ((event: React.SyntheticEvent, value: any) => void) | undefined;
  /**
   * If `true`, all `BottomNavigationAction`s will show their labels.
   * By default, only the selected `BottomNavigationAction` will show its label.
   * @default false
   */
  showLabels?: boolean | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
  /**
   * The value of the currently selected `BottomNavigationAction`.
   */
  value?: any;
}

export interface BottomNavigationTypeMap<
  AdditionalProps = {},
  RootComponent extends React.ElementType = 'div',
> {
  props: AdditionalProps & BottomNavigationOwnProps;
  defaultComponent: RootComponent;
}

declare const BottomNavigation: OverridableComponent<BottomNavigationTypeMap>;

export type BottomNavigationProps<
  RootComponent extends React.ElementType = BottomNavigationTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<BottomNavigationTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};
```

### vendor/src/BottomNavigationAction/BottomNavigationAction.d.ts

```ts
import * as React from 'react';

import { SxProps } from '@mui/system';

import { CreateSlotsAndSlotProps, SlotProps } from '../utils/types';

import { Theme } from '../styles';

import {
  ButtonBaseProps,
  ButtonBaseTypeMap,
  ExtendButtonBase,
  ExtendButtonBaseTypeMap,
} from '../ButtonBase';

import { OverrideProps } from '../OverridableComponent';

import { BottomNavigationActionClasses } from './bottomNavigationActionClasses';

export interface BottomNavigationActionSlots {
  /**
   * The component that renders the root.
   * @default ButtonBase
   */
  root: React.ElementType;
  /**
   * The component that renders the label.
   * @default span
   */
  label: React.ElementType;
}

export type BottomNavigationActionSlotsAndSlotProps = CreateSlotsAndSlotProps<
  BottomNavigationActionSlots,
  {
    /**
     * Props forwarded to the root slot.
     * By default, the available props are based on the ButtonBase element.
     */
    root: SlotProps<React.ElementType<ButtonBaseProps>, {}, BottomNavigationActionOwnerState>;
    /**
     * Props forwarded to the label slot.
     * By default, the available props are based on the span element.
     */
    label: SlotProps<'span', {}, BottomNavigationActionOwnerState>;
  }
>;

export interface BottomNavigationActionOwnProps extends BottomNavigationActionSlotsAndSlotProps {
  /**
   * This prop isn't supported.
   * Use the `component` prop if you need to change the children structure.
   */
  children?: React.ReactNode;
  /**
   * Override or extend the styles applied to the component.
   */
  classes?: Partial<BottomNavigationActionClasses> | undefined;
  /**
   * The icon to display.
   */
  icon?: React.ReactNode;
  /**
   * The label element.
   */
  label?: React.ReactNode;
  /**
   * If `true`, the `BottomNavigationAction` will show its label.
   * By default, only the selected `BottomNavigationAction`
   * inside `BottomNavigation` will show its label.
   *
   * The prop defaults to the value (`false`) inherited from the parent BottomNavigation component.
   */
  showLabel?: boolean | undefined;
  /**
   * The system prop that allows defining system overrides as well as additional CSS styles.
   */
  sx?: SxProps<Theme> | undefined;
  /**
   * You can provide your own value. Otherwise, we fallback to the child position index.
   */
  value?: any;
}

export type BottomNavigationActionTypeMap<
  AdditionalProps,
  RootComponent extends React.ElementType,
> = ExtendButtonBaseTypeMap<{
  props: AdditionalProps & BottomNavigationActionOwnProps;
  defaultComponent: RootComponent;
}>;

declare const BottomNavigationAction: ExtendButtonBase<
  BottomNavigationActionTypeMap<{}, ButtonBaseTypeMap['defaultComponent']>
>;

export type BottomNavigationActionProps<
  RootComponent extends React.ElementType = ButtonBaseTypeMap['defaultComponent'],
  AdditionalProps = {},
> = OverrideProps<BottomNavigationActionTypeMap<AdditionalProps, RootComponent>, RootComponent> & {
  component?: React.ElementType | undefined;
};

export interface BottomNavigationActionOwnerState extends Omit<
  BottomNavigationActionProps,
  'slots' | 'slotProps'
> {}
```

## 安装后验收

执行严格类型检查、生产构建和实际交互。检查键盘标签／焦点、原生支持的禁用／错误／只读语义、深浅色、窄屏和减少动画。按真实宿主数据检查回调，不把复制提示词当作安装完成。初始化工具还需检查服务端 HTML 与无告警水合。

## 来源与许可

https://github.com/mui/material-ui/tree/809a7717b4c050ba3f69b75300689f07c050a16e

MIT · @mui/material@9.4.0. 保留上游原始内容与许可证。上游完整原文保留于 vendor/docs，不标为全文中文化。

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JGuang 全部资源索引: https://jiguang132.com/llms.txt