链接到其他应用

了解如何根据另一个应用的 URL 方案处理和打开应用中的 URL。

通过使用目标应用的 URL，可以处理从你的应用链接到其他应用。你可以使用两种方法从你的应用打开此类 URL：

¥Handling linking into other apps from your app is achieved by using the target app's URL. There are two methods you can use to open such URLs from your app:

• 使用 expo-linking API

  ¥Using the expo-linking API

• 使用 Expo Router 的 Link 组件

  ¥Using Expo Router's Link component

使用旧版 FileSystem API

¥Using expo-linking API

expo-linking API 提供了对原生链接 API（例如 Web 上的 window.history）的通用抽象，并为你的应用提供了与其他已安装应用交互的实用程序。

¥The expo-linking API provides a universal abstraction over native linking APIs (such as window.history on the web) and offers utilities for your app to interact with other installed apps.

以下示例使用 Linking.openURL 在操作系统的默认浏览器中打开 通用 URL 方案：

¥The example below opens at the common URL scheme in the default browser of the operating system using Linking.openURL:

import { Button, View, StyleSheet } from 'react-native';
import * as Linking from 'expo-linking';

export default function Home() {
  return (
    <View style={styles.container}>
      <Button title="Open a URL" onPress={() => Linking.openURL('https://expo.dev/')} />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
});

在 Expo Router 应用中使用 React Server Components

¥Using Expo Router's Link component

如果你的项目使用 Expo 路由，请使用 Link 组件打开 URL。它在原生平台上封装一个 <Text> 组件，在 Web 上封装一个 <a> 元素。它还使用 expo-linking API 来处理 URL 方案。

¥If your project uses Expo Router, use the Link component to open a URL. It wraps a <Text> component on native platforms and an <a> element on the web. It also uses the expo-linking API to handle URL schemes.

以下示例在操作系统的默认浏览器中打开 通用 URL 方案 (HTTPS)：

¥The example below opens a common URL scheme (HTTPS) in the default browser of the operating system:

import { Button, View, StyleSheet } from 'react-native';
import { Link } from 'expo-router';

export default function Home() {
  return (
    <View style={styles.container}>
      <Link href="https://expo.dev">Open a URL</Link>
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
});

常见 URL 方案

¥Common URL schemes

有内置的 URL 方案，可在所有平台上提供对核心功能的访问。以下是常用方案列表：

¥There are built-in URL schemes that provide access to core functionality on all platforms. Here is a list of commonly-used schemes:

import { withAndroidManifest, ConfigPlugin } from 'expo/config-plugins';

const withAndroidQueries: ConfigPlugin = config => {
  return withAndroidManifest(config, config => {
    config.modResults.manifest.queries = [
      {
        intent: [
          {
            action: [{ $: { 'android:name': 'android.intent.action.SENDTO' } }],
            data: [{ $: { 'android:scheme': 'mailto' } }],
          },
          {
            action: [{ $: { 'android:name': 'android.intent.action.DIAL' } }],
          },
        ],
      },
    ];

    return config;
  });
};

module.exports = withAndroidQueries;

{
  "expo": {
    "plugins": [
      "./my-plugin.ts"
      %%placeholder-start%%... %%placeholder-end%%
    ]
  }
}

Custom URL schemes

If you know the custom scheme for the app you want to open, you can link to it using any of the methods: Using expo-linking API or Using Link from Expo Router.

Some services provide documentation on how to use their app's custom URL schemes. For example, Uber's deep linking documentation describes how to link directly to a specific pickup location and destination:

uber://?client_id=<CLIENT_ID>&action=setPickup&pickup[latitude]=37.775818&pickup[longitude]=-122.418028&pickup[nickname]=UberHQ&pickup[formatted_address]=1455%20Market%20St%2C%20San%20Francisco%2C%20CA%2094103&dropoff[latitude]=37.802374&dropoff[longitude]=-122.405818&dropoff[nickname]=Coit%20Tower&dropoff[formatted_address]=1%20Telegraph%20Hill%20Blvd%2C%20San%20Francisco%2C%20CA%2094133&product_id=a1111c8c-c720-46c3-8534-2fcdd730040d&link_text=View%20team%20roster&partner_deeplink=partner%3A%2F%2Fteam%2F9383

In the example above, if the user does not have the Uber app installed on their device, your app can direct them to the Google Play Store or Apple App Store to install it. We recommend using the react-native-app-link library to handle these scenarios.

{
  "expo": {
    "ios": {
      "infoPlist": {
        "LSApplicationQueriesSchemes": ["uber"]
      }
    }
  }
}

Create URLs

You can use Linking.createURL to create a URL that can be used to open or redirect back to your app. This method resolves to the following:

• Production and development builds: myapp://, where myapp is the custom scheme defined in the app config
• Development in Expo Go: exp://127.0.0.1:8081

Using Linking.createURL helps you avoid hardcoding URLs. You can modify the returned URL by passing optional parameters to this method.

To pass data to your app, you can append it as a path or query string to the URL. Linking.createURL will construct a working URL automatically. For example:

const redirectUrl = Linking.createURL('path/into/app', {
  queryParams: { hello: 'world' },
});

This will resolve into the following, depending on the environment:

• Production and development builds: myapp://path/into/app?hello=world
• Development in Expo Go: exp://127.0.0.1:8081/--/path/into/app?hello=world

In-app browsers

The expo-linking API allows you to open a URL using the operating system's default web browser app. You can use the expo-web-browser library to open URLs in an in-app browser. For example, an in-app browser is useful for secure authentication.

import { Button, View, StyleSheet } from 'react-native';
import * as Linking from 'expo-linking';
import * as WebBrowser from 'expo-web-browser';

export default function Home() {
  return (
    <View style={styles.container}>
      <Button
        title="Open URL with the system browser"
        onPress={() => Linking.openURL('https://expo.dev')}
        style={styles.button}
      />
      <Button
        title="Open URL with an in-app browser"
        onPress={() => WebBrowser.openBrowserAsync('https://expo.dev')}
        style={styles.button}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
  },
  button: {
    marginVertical: 10,
  },
});

网页端的附加链接功能

¥Additional link functionality on web

为了在网页端提供附加链接功能，例如右键单击复制或悬停预览，你可以使用 expo-router 库中的 Link 组件。

¥To provide additional link functionality on the web, such as right-click to copy or hover to preview, you can use a Link component from the expo-router library.

import { Link } from 'expo-router';

export default function Home() {
  return <Link href="https://expo.dev">Go to Expo</Link>;
}

或者，你可以使用 @expo/html-elements 库来使用通用的 <A> 元素：

¥Alternatively, you can use the @expo/html-elements library to use a universal <A> element:

import { A } from '@expo/html-elements';

export default function Home() {
  return <A href="https://expo.dev">Go to Expo</A>;
}

<A> 组件在网页端渲染 <a>，并在原生平台上渲染使用 expo-linking API 的交互式 <Text>。

¥The <A> component renders an <a> on the web and an interactive <Text>that uses the expo-linking API on native platforms.