angular5 基於ngx-translate實現多語言切換

weixin_33686714發表於2018-08-23

angular的坑永遠都是那麼多,當然了,主要還是我太菜~

基於ngx-translate實現多語言切換這個功能,我又是折騰了很久,下面是我實現的過程:

 

1、安裝ngx-translate

需要安裝@ngx-translate/core和@ngx-translate/http-loader,我的問題主要出在這個,angular的版本不同,要安裝對應元件的版本也不同。

可以到官網檢視對應版本的說明:https://github.com/ngx-translate/core

我本地用的是angular5,使用最新的版本,會報錯。。

針對angular5版本的元件安裝命令是:

npm install @ngx-translate/core@9.1.1 --save

npm install @ngx-translate/http-loader@2.0.1 --save

 

如果你用的不是angular5,可以到下面對應的changelog頁面,查詢對應的版本號:

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

https://github.com/ngx-translate/http-loader/releases

 

2、修改app.module.ts,新增對ngx-translate的支援

引入:

import { HttpClientModule,HttpClient }    from '@angular/common/http';
import {TranslateModule,TranslateLoader} from '@ngx-translate/core';
import {TranslateHttpLoader} from '@ngx-translate/http-loader';

  export function HttpLoaderFactory(httpClient: HttpClient) {
    return new TranslateHttpLoader(httpClient);
  }
@NgModule中新增支援(紅色內容是新增的內容):
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    TranslateModule.forRoot({
      loader: {
        provide: TranslateLoader,
        useFactory: HttpLoaderFactory,
        deps: [HttpClient]
      }
    })
  ],
  providers: [],
  bootstrap: [AppComponent]
})

 

3、修改app.component.ts,新增對ngx-translate的支援

 引入ngx-translate:

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

初始化(紅色內容為新增內容):

  constructor(platform: Platform, statusBar: StatusBar, splashScreen: SplashScreen,public translate: TranslateService) {
    platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.
      statusBar.styleDefault();
      splashScreen.hide();

    translate.addLangs(["zh", "en"]);
    translate.setDefaultLang('zh');

    const browserLang = translate.getBrowserLang();
    translate.use(browserLang.match(/zh|en/) ? browserLang : 'zh');
    });

 

4、新增語言資原始檔:

新增en.json和zh.json檔案,這兩個檔案要建在:

專案根目錄-》src-》assets-》i18n目錄下,我的en.json檔案內容如下:

{
  "search": "search",
  "submit": "Submit",
  "home": {
    "firstPage": "First",
    "lastPage": "Last",
    "previousPage": "Previous",
    "nextPage": "Next"
  }
}

zh.json檔案內容如下:

{
  "search": "搜尋",
  "submit": "提交",
  "home": {
    "firstPage": "首頁",
    "lastPage": "末頁",
    "previousPage": "上一頁",
    "nextPage": "下一頁"
  }
}

 

5、在html頁面中可以引入資源

{{'search' | translate}}
{{'home.firstPage' | translate}}
search和home.firstPage是資源的名稱


官方參考例子:https://stackblitz.com/github/ngx-translate/example

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