React Native -如何使用UI动态更新应用程序语言？

npm install react-native-localize i18n-js

// i18n.js
import * as RNLocalize from 'react-native-localize';
import i18n from 'i18n-js';
import en from './locales/en.json';
import zh from './locales/zh.json';

const locales = RNLocalize.getLocales();

if (Array.isArray(locales)) {
  i18n.locale = locales[0].languageTag;
}

i18n.fallbacks = true;
i18n.translations = { en, zh };

export default i18n;

// locales/en.json
{
  "greeting": "Hello!"
}

// locales/zh.json
{
  "greeting": "你好！"
}

// App.js
import React, { useEffect, useState } from 'react';
import { View, Text, Button } from 'react-native';
import i18n from './i18n';

const App = () => {
  const [language, setLanguage] = useState(i18n.locale);

  useEffect(() => {
    i18n.locale = language;
  }, [language]);

  const changeLanguage = (lang) => {
    setLanguage(lang);
  };

  return (
    <View>
      <Text>{i18n.t('greeting')}</Text>
      <Button title="English" onPress={() => changeLanguage('en')} />
      <Button title="中文" onPress={() => changeLanguage('zh')} />
    </View>
  );
};

export default App;