在线性垫 - 水平步进器中使用单独的部件

Question

在Angular中，是否可以使用线性步进器，其中各个步骤是单独的组件？例如：

<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>

当我尝试这个时，我在按下matStepperNext按钮时收到以下错误：

TypeError: Cannot read property 'invalid' of undefined。

Answer 1

这是适合我的解决方案。

<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]
    });
  }
}

儿童组件

<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]
    });
  }

}

Answer 2

您可以使用子表单来解决它。几个月前我在Angular-UP会议上发表了一篇关于它的演讲：https://www.youtube.com/watch?v=sb7tgsNF2Jk

通常，这个想法是在子组件中创建表单，使用DI注入controlContainer并将本地表单设置为controlContainer表单。

子组件：

 @Component({
  selector: 'app-company-info',
  templateUrl: './company-info.component.html',
  styleUrls: ['./company-info.component.scss'],
  viewProviders: [{ provide: ControlContainer, useExisting: FormGroupDirective }]
})
export class CompanyInfoComponent implements OnInit {

  form: FormGroup;
  constructor(
    private ctrlContainer: FormGroupDirective,
    private fb: FormBuilder) { }

  ngOnInit() {

    this.form = this.ctrlContainer.form;

    this.form.addControl('company',
      this.fb.group({
        'companyName': this.fb.control(null, [Validators.required]),
        'numOfEmployees': this.fb.control(null, [Validators.required])});

  }

}

父组件（html）：

<mat-horizontal-stepper [linear]="isLinear" #stepper>
  <mat-step [stepControl]="companyInfo">
    <ng-template matStepLabel>Fill out your name</ng-template>

    <form [formGroup]="companyInfo">
      <app-company-info></app-company-info>
    </form>

    <div>
      <button mat-button matStepperNext>Next</button>
    </div>
  </mat-step>
</mat-horizontal-stepper>

父组件（ts）：

export class WizardComponent implements OnInit {

  isLinear = true;
  companyInfo: FormGroup;

  constructor(private _formBuilder: FormBuilder) {

  }

  ngOnInit() {

    this.companyInfo = this._formBuilder.group({
    });

  }

}

Answer 3

好的，我想我看到了一些问题：

<mat-horizontal-stepper [linear]="isLinear">
  <mat-step [stepControl]="foodFormGroup">
    <food-selection></food-selection>
  </mat-step>
  <mat-step [stepControl]="pieFormGroup">
    <pie-selection></pie-selection>
  </mat-step>
</mat-horizontal-stepper>

需要在你的tough-choice.component.ts文件中定义foodFormGroup和pieFormGroup（在你的示例代码中，btw拼写错误）

以下是一个示例（来自文档）的示例：

import {Component} from '@angular/core';
import {FormBuilder, FormGroup, Validators} from '@angular/forms';

/**
 * @title Stepper overview
 */
@Component({
  selector: 'stepper-overview-example',
  templateUrl: 'stepper-overview-example.html',
  styleUrls: ['stepper-overview-example.css']
})
export class StepperOverviewExample {
  isLinear = false;
  firstFormGroup: FormGroup;
  secondFormGroup: FormGroup;

  constructor(private _formBuilder: FormBuilder) { }

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

另外，我没有在您的示例中看到module.ts文件。这就是你想要导入@ angular / material模块的地方，而不是组件文件。

我建议只给一次Angular Material文档。 https://material.angular.io/components/stepper/overview

Answer 4

在这篇文章中回答：qazxsw poi

*对不起，如果这不是链接其他帖子的正确方法。