如何在 Angular 5 中使用材料步进器

Question

I'm currently somewhat new to Angular and I'm trying to figure out how to make a simple stepper that goes (1) -- (2) -- (3).

I have the html down as app.component.html

<mat-horizontal-stepper [linear]="true" #stepper>
    <mat-step label="Step 1">
        step 1
    </mat-step>
    <mat-step label="Step 2">
        step 2
    </mat-step>
</mat-horizontal-stepper>

However, what do I need to import and do in typescript to make this work? I have app.component.ts as

import { Component, ViewChild } from '@angular/core';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatButtonModule } from '@angular/material';
import {FormsModule, ReactiveFormsModule} from '@angular/forms';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})

export class AppComponent {
  @ViewChild('stepper') stepper;
  changeStep(index: number) {
    this.stepper.selectedIndex = index;
  }
}

Answer 1

Import the following components of angular material and use the same code that you have

Module.ts

import { MatStepperModule, MatInputModule, MatButtonModule, MatAutocompleteModule } from '@angular/material';


@NgModule({
    imports: [
        ...    
        MatStepperModule,
        MatInputModule,
        MatButtonModule,
        MatAutocompleteModule,                        
    ],...

HTML

<mat-horizontal-stepper [linear]="isLinear"> 
    <mat-step [stepControl]="firstFormGroup">
       <form [formGroup]="firstFormGroup">  
        <ng-template matStepLabel>Step 1</ng-template>  
        <button mat-button mat-raised-button color="primary" matStepperNext>Solve</button>        
      </form>
    </mat-step>

    <mat-step [stepControl]="secondFormGroup">
      <form [formGroup]="secondFormGroup">
        <ng-template matStepLabel>Step 2</ng-template>
        <mat-form-field>
            <input matInput placeholder="Any input" formControlName="secondCtrl" required>
        </mat-form-field>
        <button mat-button mat-raised-button color="primary" matStepperNext>Next</button>          
        <button mat-button mat-raised-button color="" matStepperPrevious>Back</button>        
      </form>
    </mat-step>

    <mat-step>
      <ng-template matStepLabel icon>Done</ng-template>
      You are now done.      
      <button mat-button mat-raised-button color="primary" >Done</button>      
    </mat-step>
</mat-horizontal-stepper>

Component.ts

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

....
export class ComponentStepper{

  isLinear = true;
  firstFormGroup: FormGroup;
  secondFormGroup: FormGroup;

  constructor(private _formBuilder: FormBuilder){} 

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

This is a complete Demo even with FormGruop validations

Answer 2

Along with Abel Valdez's answer dont forget to import CdkStepperModule to stepper to work

 import { CdkStepperModule } from '@angular/cdk/stepper';

and

imports: [
    ...
    CdkStepperModule,
    MatStepperModule,