如果在angular material中选中了所有子复选框，则不会选中标题复选框

<mat-checkbox [(ngModel)]="selectAll">标题复选框</mat-checkbox>

<mat-checkbox *ngFor="let option of options" [(ngModel)]="option.checked">
  {{ option.label }}
</mat-checkbox>

selectAll: boolean = false;

options: any[] = [
  { label: '选项1', checked: false },
  { label: '选项2', checked: false },
  { label: '选项3', checked: false },
  // 其他选项...
];

selectAllChanged() {
  if (this.selectAll) {
    this.options.forEach(option => option.checked = true);
  } else {
    this.options.forEach(option => option.checked = false);
  }
}

<mat-checkbox [(ngModel)]="selectAll" (change)="selectAllChanged()">标题复选框</mat-checkbox>