StorageService返回回调Ionic2/Angular2

import { StorageService } from 'path/to/storage.service';

@Component({
  selector: 'app-example',
  templateUrl: 'example.component.html',
  styleUrls: ['example.component.css']
})
export class ExampleComponent implements OnInit {

  constructor(private storageService: StorageService) { }

  ngOnInit() {
    // 存储数据
    this.storageService.set('key', 'value').then(() => {
      console.log('存储成功');
    }).catch((error) => {
      console.log('存储失败：', error);
    });

    // 检索数据
    this.storageService.get('key').then((data) => {
      console.log('检索成功：', data);
    }).catch((error) => {
      console.log('检索失败：', error);
    });
  }

}