如何在ionic 2中从下拉列表中获取所选值

<select [(ngModel)]="selectedValue">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

selectedValue: string;

<select [(ngModel)]="selectedValue" (ionChange)="onSelectionChange()">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

onSelectionChange() {
  // 执行所需的操作
}