如何在Ionic中从模式视图发回参数

async openModal() {
  const modal = await this.modalController.create({
    component: ModalPage,
    componentProps: {
      param: 'Hello from parent page'
    }
  });
  await modal.present();
}

import { NavParams } from '@ionic/angular';

constructor(private navParams: NavParams) {}

ngOnInit() {
  const param = this.navParams.get('param');
  console.log(param); // 输出 'Hello from parent page'
}

returnData() {
  const data = {
    result: 'Data from modal'
  };
  this.modalController.dismiss(data);
}

async openModal() {
  const modal = await this.modalController.create({
    component: ModalPage,
    componentProps: {
      param: 'Hello from parent page'
    }
  });
  await modal.present();

  modal.onDidDismiss().then((data) => {
    console.log(data); // 输出 { data: { result: 'Data from modal' }, role: 'backdrop' }
    console.log(data.data.result); // 输出 'Data from modal'
  });
}