如何在ionic2中重新加载接口url

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { LoadingController, ToastController } from 'ionic-angular';

@Component({
  selector: 'page-example',
  templateUrl: 'example.html'
})
export class ExamplePage {
  apiUrl: string;
  data: any;

  constructor(
    private http: HttpClient,
    private loadingCtrl: LoadingController,
    private toastCtrl: ToastController
  ) {
    this.apiUrl = 'https://example.com/api/data';
    this.loadData();
  }

  loadData() {
    const loading = this.loadingCtrl.create({
      content: 'Loading...'
    });
    loading.present();

    this.http.get(this.apiUrl)
      .subscribe(
        (response) => {
          this.data = response;
          loading.dismiss();
        },
        (error) => {
          loading.dismiss();
          this.showToast('Failed to load data. Please try again.');
        }
      );
  }

  reloadUrl() {
    this.loadData();
  }

  showToast(message: string) {
    const toast = this.toastCtrl.create({
      message: message,
      duration: 3000
    });
    toast.present();
  }
}