(ionChange)不在Ionic 3中发送数据

<!-- your-page.html -->
<ion-header>
  <ion-navbar>
    <ion-title>选择框示例</ion-title>
  </ion-navbar>
</ion-header>

<ion-content padding>
  <ion-item>
    <ion-label>选择框</ion-label>
    <ion-select [(ngModel)]="selectedValue" (ionChange)="onChange($event)">
      <ion-option value="option1">选项1</ion-option>
      <ion-option value="option2">选项2</ion-option>
    </ion-select>
  </ion-item>

  <p>你选择了: {{selectedValue}}</p>
</ion-content>

// your-page.ts
import { Component } from '@angular/core';

@Component({
  selector: 'page-your',
  templateUrl: 'your-page.html',
})
export class YourPage {
  selectedValue: string;

  onChange(event) {
    this.selectedValue = event.detail.value;
    console.log('Selected value:', this.selectedValue);
  }
}