您可以使用ngIf/else来显示单击Allega verbale时的按钮。在您的.ts文件中，您将拥有：

export class YourPage {
  // just an property to control whose button is shown
  public allegaClicked: boolean = false;
}

然后在HTML中

<ion-content>
  <!-- your content -->
  ...
  <!-- use and ngIf to show your button, when clicked it'll set allegaClicked to the oposite value and show cameraButtons block -->
  <button ion-button (click)="allegaClicked = !allegaClicked" *ngIf="!allegaClicked; else cameraButtons">Allega Verbale</button>
  <!-- when ngIf is false it'll show that block, the else statement only works with ng-template, if you want another element instead of using an ng-template you can use *ngIf="allegaClicked", it's up to you -->
  <ng-template #cameraButtons>
    <div>
      <button ion-button>Camera</button>
      <button ion-button>Gallery</button>
    </div>
  </ng-template>
</ion-content>

这样，您就可以简单地切换要显示的按钮。