<div *ngFor="let item of items">
  <input type="checkbox" [(ngModel)]="item.checked" (change)="onCheckboxChange(item)">
  {{ item.label }}
  <div *ngIf="item.children">
    <div style="margin-left: 20px;">
      <div *ngFor="let child of item.children">
        <input type="checkbox" [(ngModel)]="child.checked" (change)="onCheckboxChange(child)">
        {{ child.label }}
      </div>
    </div>
  </div>
</div>

export class YourComponent {
  items = [
    {
      label: 'Item 1',
      checked: false,
      children: [
        {
          label: 'Child 1',
          checked: false
        },
        {
          label: 'Child 2',
          checked: false
        }
      ]
    },
    {
      label: 'Item 2',
      checked: false
    }
  ];

  onCheckboxChange(item: any) {
    // 处理复选框值的变化
    console.log(item);
  }
}