在线性垫水平步进器中使用单独的组件 [英] Using separate components in a linear mat-horizontal-stepper

问题描述

在Angular中，是否可以有一个线性步进器，其中各个步是独立的组件?例如:

In Angular, is it possible to have a linear stepper where the individual steps are separate components? For example:

<mat-horizontal-stepper [linear]="isLinear">
    <mat-step [stepControl]="firstFormGroup" label="Some Form">
        <first-component></first-component>
    </mat-step>
    <mat-step [stepControl]="secondFormGroup" label="Another Form">
        <second-component></second-component>
    </mat-step>
    <mat-step [stepControl]="thirdFormGroup" label="Review">
        <third-component></third-component>
    </mat-step>
</mat-horizontal-stepper>

尝试此操作时，按matStepperNext按钮会收到以下错误:

When I try this, I receive the following error upon hitting the matStepperNext button:

TypeError: Cannot read property 'invalid' of undefined.

推荐答案

以下是对我有用的解决方案.

Here is the solution that work for me.

<mat-horizontal-stepper [linear]="true" #stepper>
  <mat-step [stepControl]="selectAdvType">
    <ng-template matStepLabel>
      <div class="text-center">
        <mat-icon>queue_play_next</mat-icon><br /><span>Select Adv Type</span>
      </div>
    </ng-template>
    <app-advertisement-type></app-advertisement-type>
  </mat-step>
  <mat-step [stepControl]="selectAdvType">
    <ng-template matStepLabel>
      <div class="text-center">
        <mat-icon>directions_car</mat-icon><br /><span>Select Car</span>
      </div>
    </ng-template>
    <app-select-car-adv></app-select-car-adv>
  </mat-step>
  <mat-step>
    <ng-template matStepLabel>
      <div class="text-center">
        <mat-icon>description</mat-icon><br /><span>Select Features</span>
      </div>
    </ng-template>
    <div>
      <button mat-button matStepperPrevious>Back</button>
      <button mat-button (click)="stepper.reset()">Reset</button>
    </div>
  </mat-step>
</mat-horizontal-stepper>

父Ts文件

@Component({
  selector: 'app-customer.create.advertisement',
  templateUrl: './customer.create.advertisement.component.html',
  styleUrls: ['./customer.create.advertisement.component.scss']
})
export class CustomerCreateAdvertisementComponent implements OnInit {
  isLinear = false;
  selectAdvType: FormGroup;
  constructor(private _formBuilder: FormBuilder) { }
  ngOnInit() {
    this.selectAdvType = this._formBuilder.group({
      firstCtrl: ['', Validators.required]
    });
  }
}

子组件

<form [formGroup]="firstFormGroup">
    <ng-template matStepLabel>Fill out your name</ng-template>
    <mat-form-field>
        <input matInput placeholder="Last name, First name" formControlName="firstCtrl" required>
    </mat-form-field>
    <div>
        <button mat-button matStepperNext>Next</button>
    </div>
</form>


@Component({
  selector: 'app-advertisement-type',
  templateUrl: './advertisement-type.component.html',
  styleUrls: ['./advertisement-type.component.scss']
})
export class AdvertisementTypeComponent implements OnInit {
  firstFormGroup: FormGroup;
  constructor(private _formBuilder: FormBuilder) { }

  ngOnInit() {
    this.firstFormGroup = this._formBuilder.group({
      firstCtrl: ['', Validators.required]
    });
  }

}

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