检查存储是否为空Ionic 4存储插件

import { Storage } from '@ionic/storage';

constructor(private storage: Storage) {
  this.checkStorageIsEmpty();
}

async checkStorageIsEmpty() {
  try {
    const keys = await this.storage.keys();
    if (keys.length === 0) {
      console.log('Storage is empty');
    } else {
      console.log('Storage is not empty');
    }
  } catch (error) {
    console.error('Error checking storage:', error);
  }
}

import { IonicStorageModule } from '@ionic/storage';

@NgModule({
  imports: [
    BrowserModule,
    IonicModule.forRoot(),
    IonicStorageModule.forRoot({
      name: '__mydb',
      driverOrder: ['indexeddb', 'localstorage']
    })
  ],
  ...
})
export class AppModule { }

try {
  await this.storage.set('key', 'value');
} catch (error) {
  console.error('Error storing data:', error);
}