如何在Ionic 4中配置警报控制器中的复选框和返回值？

import { AlertController } from '@ionic/angular';
import { Checkbox } from '@ionic/angular';

constructor(public alertController: AlertController) {}

async presentAlert() {
  const alert = await this.alertController.create({
    header: '选择选项',
    inputs: [
      {
        name: 'option1',
        type: 'checkbox',
        label: '选项1',
        value: 'value1',
        checked: true
      },
      {
        name: 'option2',
        type: 'checkbox',
        label: '选项2',
        value: 'value2'
      },
      {
        name: 'option3',
        type: 'checkbox',
        label: '选项3',
        value: 'value3'
      }
    ],
    buttons: [
      {
        text: '取消',
        role: 'cancel',
        cssClass: 'secondary',
        handler: () => {
          console.log('取消');
        }
      }, {
        text: '确定',
        handler: (data) => {
          console.log('选择的选项:', data);
        }
      }
    ]
  });

  await alert.present();
}

<ion-button (click)="presentAlert()">显示警报</ion-button>