Angular查找控件名称所属的嵌套组

@Input() controlName: string;

<app-child [controlName]="controlName"></app-child>

ngOnInit() {
  this.findNestedGroup(this.controlName, this.parentFormGroup);
}

findNestedGroup(controlName: string, formGroup: FormGroup) {
  const control = formGroup.get(controlName);

  if (control) {
    console.log('Found control:', controlName);
    console.log('Nested group:', formGroup);
  } else {
    Object.keys(formGroup.controls).forEach(key => {
      const nestedControl = formGroup.get(key);

      if (nestedControl instanceof FormGroup) {
        this.findNestedGroup(controlName, nestedControl);
      }
    });
  }
}