这是我的表单的结构：

this.formData = new FormGroup({
  selectedAnimal: new FormArray([], [Validators.required]),
  selectedTransport: new FormArray([], [Validators.required]),
  roadName: new FormControl({ disabled: true, value: null }, Validators.required),
  roadZip: new FormControl({ disabled: true, value: null }, Validators.required),
  planeName: new FormControl({ disabled: true, value: null }, Validators.required),
  planeZip: new FormControl({ disabled: true, value: null }, Validators.required)
});

对应的HTML

<form [formGroup]="formData" (ngSubmit)="onSubmit()">
  <div class="animal-checkbox-group" formArrayName="selectedAnimal">
    <!-- multiple checkbox options, selecting one is mandatory -->
  </div>

  <div class="animal-checkbox-group" formArrayName="selectedTransport">
    <!-- multiple checkbox options, selecting one is mandatory -->
    <div class="if-checkbox-1-selected">
      <!-- conditional checkbox: if checkbox is selected -> new new form controls -> they should be defined for successful validation -->
      <input type="text" formControlName="roadName">
    </div>
  </div>
</form>

错误：

错误：找不到具有以下路径的控件：‘seltedTransport->；RoadName’

推荐答案

在本例中，控件呈现在Form数组抽象控件内，因此您必须为所有控件名称提供表单组，如下所述：

<div [formGroup]="formData">
    Road Name: <input type="text" formControlName="roadName">
</div>

以下是工作代码：stackblitz