如何获得离子checbox的选定ID

Question

我想获取所有复选框的所有选定ID，请帮助

<ion-item *ngFor="let colpoint of CPs">
  <ion-label>{{colpoint.Name}}</ion-label>
    <ion-checkbox id="{{colpoint.ID}}"  (ionChange)="onChange(colpoint.ID, $event.checked, i)" ></ion-checkbox>
   </ion-item>