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122 lines
2.8 KiB
Markdown
122 lines
2.8 KiB
Markdown
---
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category: Components
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subtitle: 包裹组件
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group: 其他
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title: App
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cover: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*HJz8SZos2wgAAAAAAAAAAAAADrJ8AQ/original
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demo:
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cols: 2
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---
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新的包裹组件，提供重置样式和提供消费上下文的默认环境。
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## 何时使用
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- 提供可消费 React context 的 `message.xxx`、`Modal.xxx`、`notification.xxx` 的静态方法，可以简化 useMessage 等方法需要手动植入 `contextHolder` 的问题。
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- 提供基于 `.ant-app` 的默认重置样式，解决原生元素没有 antd 规范样式的问题。
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## 代码演示
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<!-- prettier-ignore -->
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<code src="./demo/basic.tsx">basic</code>
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## 如何使用
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### 基础用法
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App 组件通过 `Context` 提供上下文方法调用，因而 useApp 需要作为子组件才能使用，我们推荐在应用中顶层包裹 App。
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```tsx
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import React from 'react';
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import { App } from 'antd';
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const MyPage: React.FC = () => {
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const { message, notification, modal } = App.useApp();
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message.success('Good!');
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notification.info({ message: 'Good' });
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modal.warning({ title: 'Good' });
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// ....
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// other message, notification, modal static function
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return <div>Hello word</div>;
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};
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const MyApp: React.FC = () => (
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<App>
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<MyPage />
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</App>
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);
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export default MyApp;
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```
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注意：App.useApp 必须在 App 之下方可使用。
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### 与 ConfigProvider 先后顺序
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App 组件只能在 `ConfigProvider` 之下才能使用 Design Token， 如果需要使用其样式重置能力，则 ConfigProvider 与 App 组件必须成对出现。
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```tsx
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<ConfigProvider theme={{ ... }}>
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<App>
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...
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</App>
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</ConfigProvider>
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```
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### 内嵌使用场景（如无必要，尽量不做嵌套）
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```tsx
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<App>
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<Space>
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...
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<App>...</App>
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</Space>
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</App>
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```
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### 全局场景（redux 场景）
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```tsx
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// Entry component
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import React, { useEffect } from 'react';
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import { App } from 'antd';
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import type { MessageInstance } from 'antd/es/message/interface';
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import type { NotificationInstance } from 'antd/es/notification/interface';
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import type { ModalStaticFunctions } from 'antd/es/modal/confirm';
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let message: MessageInstance;
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let notification: NotificationInstance;
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let modal: Omit<ModalStaticFunctions, 'warn'>;
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export default () => {
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const staticFunction = App.useApp();
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message = staticFunction.message;
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modal = staticFunction.modal;
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notification = staticFunction.notification;
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return null;
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};
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export { message, notification, modal };
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```
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```tsx
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// sub page
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import React from 'react';
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import { Button, Space } from 'antd';
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import { message, modal, notification } from './store';
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export default () => {
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const showMessage = () => {
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message.success('Success!');
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};
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return (
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<Space>
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<Button type="primary" onClick={showMessage}>
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Open message
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</Button>
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</Space>
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);
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};
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```
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