组件渲染时未初始化i18n

如何解决组件渲染时未初始化i18n

在我的expo应用程序中，我想使用i18n-js对字符串进行国际化。

问题在于，它是异步初始化的，并且组件的der渲染更快。因此，我得到“缺少xy翻译”的结果。渲染前如何实现初始化？

我发布了我的i18n组件。计划只是导入那个并使用它的功能t（）。

import * as Localization from 'expo-localization';
import i18n from 'i18n-js';
i18n.translations = {
  en: {
    "hello": "Hello World!","signin": "Sign In","wrongPassword": "Wrong Password","Please enter a valid email address": "Please enter a valid email address","Username contains unallowed characters": "Username contains unallowed characters","No Acount? Sign Up": "No Acount? Sign Up","Password": "Password","Password is too short. Must be greater than 6 characters": "Password is too short. Must be greater than 6 characters","Passwords do not match": "Passwords do not match","Email address": "Email address","Enter password again":"Enter password again","Password Confirm":"Password Confirm","SIGN UP":"Sign Up","Already Signed Up? Sign In": "Already Signed Up? Sign In","You":"You","Your running games":"Your running games","New Game":"New Game","me": "me"
},de: {
    "hello": "Hello World!","signin": "Einloggen","wrongPassword": "Falsches Passwort","Please enter a valid email address": "Bitte benutzen Sie eine valide Email Adresse","Username contains unallowed characters": "Benutzername enthält unerlaubte Zeichen","No Acount? Sign Up": "Kein Konto? Registrieren!","Password": "Passwort","Password is too short. Must be greater than 6 characters": "Passwort zu kurz. Bitte mindestens 6 Zeichen","Passwords do not match": "Passwörter stimmen nicht überein","Email address": "Email Adresse","Enter password again":"Passwort nochmal eingeben","Password Confirm":"Passwort bestätigen","SIGN UP":"Registrieren","Already Signed Up? Sign In":"Bereits registriert? Einloggen!","You":"Du","Your running games":"Deine laufenden Spiele","New Game":"Neues Spiel","me": "ich"
  }
};
// Set the locale once at the beginning of your app.
i18n.locale = Localization.locale;
i18n.fallbacks = true;

const t = (text) => {
   return i18n.t(text);
};

export default t;

解决方法

由于我无法直接解决上述问题，因此我的解决方法是实现自己的功能。就我而言，我仅提供两种语言，因此非常简单。 如果对其他人也有帮助，我感到很高兴：

import * as Localization from 'expo-localization';

import en from './en.json';
import de from './de.json';

// Set the locale once at the beginning of your app.
const locale = Localization.locale.split('-')[0];

const t = (key) => {
   var v = null;
   if (locale == 'de') {
       v = de[key];
   }
   if (locale == 'en' || v == null)
      v = en[key]
   if (v == null)
      v='t('+key+')';
   return v;
};

export default t;

,

我发现了一个替代解决方案，以防您需要异步功能（例如，如果要在AsyncStorage中检查用户的首选语言）。您可以按如下所示在App.js中添加一个AppLoading组件：

在我的App.js中：

X+4

在我的i18n.js中：

import * as React from 'react';
import AppContainer from './Navigators/AppNavigationContainer.js'
import {Provider} from 'react-redux'
import store from './Reducer/store'
import {loadLocale} from './assets/locales/i18n'
import {AppLoading} from 'expo'

export default function App ({navigation}) {

  [languageReady,setLanguageReady] = React.useState(false)                                                          
 
  const init = async () => {
    await loadLocale()
  };

  return(
    <Provider store={store}>
      {languageReady ? (
        <AppContainer/>
      ) : (
        <AppLoading
        startAsync={init()}
        onFinish={setLanguageReady(true)}/>
      )}
    </Provider>
  )
}