如何在Angular中使用ngFor获取嵌套对象数组的选定值？

<div *ngFor="let item of items">
  <!-- 显示item的属性 -->
  <p>{{ item.name }}</p>
  
  <!-- 显示item的子对象数组 -->
  <div *ngFor="let subItem of item.subItems">
    <label>
      <!-- 使用ngModel绑定选定值 -->
      <input type="checkbox" [(ngModel)]="subItem.selected">
      {{ subItem.name }}
    </label>
  </div>
</div>

getSelectedItems(): any[] {
  const selectedItems: any[] = [];
  
  for (const item of this.items) {
    for (const subItem of item.subItems) {
      if (subItem.selected) {
        selectedItems.push(subItem);
      }
    }
  }
  
  return selectedItems;
}

<input type="checkbox" [(ngModel)]="subItem.selected" (change)="getSelectedItems()">