angular FormControl 初始化不生效

<label *ngFor="let textbookEdition of textbookEditions$ | async"> <input type="radio" [formControlName]="fieldName" [value]="useId ? textbookEdition.textbookEditionId : textbookEdition" [ngcChecked]="formGroup.controls[fieldName].value?.id === textbookEdition.id" /> {{ textbookEdition.name }} </label>

            `[ngcChecked]="formGroup.controls[fieldName].value?.id === textbookEdition.id"`
            加上这行就可以了。