Integrated ngx-translate of ionic3 learning

Integrate ngx-translate

official link

github：https://github.com/ngx-translate/core

Step 1：

Install

npm install @ngx-translate/core --save
npm install @ngx-translate/http-loader --save

Step 2：

Import TranslateModule, first import TranslateModule and add the following code under app.module.ts

// 导入包
import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
import { TranslateHttpLoader } from '@ngx-translate/http-loader';

// 增加方法
// The translate loader needs to know where to load i18n files
// in Ionic's static asset pipeline.
export function createTranslateLoader(http: HttpClient) {
  return new TranslateHttpLoader(http, './assets/i18n/', '.json');
}

@NgModule({
  imports: [
    BrowserModule,
    TranslateModule.forRoot({
      provide: TranslateLoader,
      useFactory: (createTranslateLoader),
      deps: [Http]
    }), 
    IonicModule.forRoot(MyApp)
  ]
})

Step 3 Create an internationalization file

Enter the following directory:

cd ionicProject/src/assets

新建一个目录为 i18n

Enter the i18n directory and create a json file

• zh-cmn-Hans.json Simplified Chinese

{
  "HOME": {
   "TITLE":"首页",
   "CONTENT":"你好，世界！"
  }
}

• zh-cmn-Hant.json Traditional Chinese

{
  "HOME": {
   "TITLE":"首頁",
   "CONTENT":"你好，世界！"
  }
}

• en.json English

{
  "HOME": {
   "TITLE":"Home",
   "CONTENT":"Hello word!"
  }
}

use

Open the file app.component.ts and add the code

import { TranslateService } from '@ngx-translate/core';


translate.setDefaultLang('en'); // 设置默认的语言包

Source code optimization in the official start demo

initTranslate() {
    // 根据浏览器来判断字符集
    this.translate.setDefaultLang('zh-cmn-Hans');
    const browserLang = this.translate.getBrowserLang();

    if (browserLang) {
      if (browserLang === 'zh') {
        const browserCultureLang = this.translate.getBrowserCultureLang();

        if (browserCultureLang.match(/-CN|CHS|Hans/i)) {
          this.translate.use('zh-cmn-Hans');
        } else if (browserCultureLang.match(/-TW|CHT|Hant/i)) {
          this.translate.use('zh-cmn-Hant');
        }
      } else {
        this.translate.use(this.translate.getBrowserLang());
      }
    } else {
      // 设置翻译
      this.translate.use('zh-cmn-Hans');
    }

  }

html

<ion-header>
  <ion-navbar>
    <ion-title>{{ 'HOME.TITLE' | translate }}</ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
   <button (click)="ChangeLanguage()" ion-button color="light">设置语言</button>
  <h2>{{ 'HOME.CONTENT' | translate }}</h2>
</ion-content>

Notice:

I have been looking for this question for a long time. At first, I didn’t know how to deal with it. I read several bloggers and went to the doctor indiscriminately when I was sick. Finally, when I saw the official website, I realized that it was a version problem. It is recommended that after reporting an error, go to the official website to see if there is any explanation. . .

If you’re still using Angular v5, please use ngx-translate 9.x because
version 10 and above are only compatible with Angular v6. If you try
to use v10 with Angular v5 you will get an error message TypeError:
Object(…) is not a function

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