如何在我的ionic 3应用程序中保存翻译的语言设置？

import { Injectable } from '@angular/core';
import { Storage } from '@ionic/storage';

@Injectable()
export class LanguageService {
  private LANGUAGE_KEY = 'language';

  constructor(private storage: Storage) {}

  // 保存语言设置
  saveLanguage(language: string): Promise<any> {
    return this.storage.set(this.LANGUAGE_KEY, language);
  }

  // 获取语言设置
  getLanguage(): Promise<string> {
    return this.storage.get(this.LANGUAGE_KEY);
  }
}

import { Component } from '@angular/core';
import { LanguageService } from './language.service';

@Component({
  selector: 'app-root',
  template: `
    <ion-header>
      <ion-toolbar>
        <ion-title>
          Ionic 3 App
        </ion-title>
      </ion-toolbar>
    </ion-header>
    <ion-content>
      <ion-list>
        <ion-item>
          <ion-label>选择语言</ion-label>
          <ion-select [(ngModel)]="selectedLanguage" (ionChange)="saveLanguage()">
            <ion-option value="en">English</ion-option>
            <ion-option value="zh">中文</ion-option>
          </ion-select>
        </ion-item>
      </ion-list>
    </ion-content>
  `,
})
export class AppComponent {
  selectedLanguage: string;

  constructor(private languageService: LanguageService) {}

  // 保存语言设置
  saveLanguage() {
    this.languageService.saveLanguage(this.selectedLanguage)
      .then(() => {
        console.log('语言设置已保存');
      })
      .catch(error => {
        console.error('保存语言设置时出错：', error);
      });
  }
}

import { Component } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';
import { LanguageService } from './language.service';

@Component({
  selector: 'app-home',
  template: `
    <ion-content>
      <h1>{{ 'WELCOME' | translate }}</h1>
      <p>{{ 'INTRODUCTION' | translate }}</p>
    </ion-content>
  `,
})
export class HomePageComponent {
  constructor(
    private translate: TranslateService,
    private languageService: LanguageService
  ) {
    // 初始化翻译服务
    this.translate.setDefaultLang('en');

    // 获取语言设置并加载相应的翻译资源
    this.languageService.getLanguage()
      .then(language => {
        if (language) {
          this.translate.use(language);
        }
      })
      .catch(error => {
        console.error('获取语言设置时出错：', error);
      });
  }
}