Angular Material 7 - 步进器

<mat-stepper> 是一个 Angular 指令，用于创建类似工作流程步骤的向导。

在本章中，我们将展示使用 Angular Material 绘制步进器控件所需的配置。

创建 Angular 应用程序

按照以下步骤更新我们在Angular 6 - 项目设置章节中创建的 Angular 应用程序 −

步骤	说明
1	创建一个名为 materialApp 的项目，如Angular 6 - 项目设置章节中所述。
2	修改 app.module.ts, app.component.ts, app.component.css 和 app.component.html，如下所述。保持其余文件不变。
3	编译并运行应用程序以验证实现逻辑的结果。

以下是修改后的模块描述符app.module.ts的内容。

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {MatStepperModule, MatInputModule, MatButtonModule} from '@angular/material'
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
@NgModule({
   declarations: [
      AppComponent
   ],
   imports: [
      BrowserModule,
      BrowserAnimationsModule,
      MatStepperModule, MatInputModule, MatButtonModule,
      FormsModule,
      ReactiveFormsModule
   ],
   providers: [],
   bootstrap: [AppComponent]
})
export class AppModule { }

以下是修改后的HTML主机文件app.component.html的内容。

<mat-horizontal-stepper [linear] = "isLinear" #stepper>
   <mat-step [stepControl] = "firstFormGroup">
      <form [formGroup] = "firstFormGroup">
         <ng-template matStepLabel>Enter 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>
   </mat-step>
   <mat-step [stepControl] = "secondFormGroup">
      <form [formGroup] = "secondFormGroup">
         <ng-template matStepLabel>Enter your address</ng-template>
         <mat-form-field>
           <input matInput placeholder = "Address" formControlName = "secondCtrl" required>
         </mat-form-field>
         <div>
           <button mat-button matStepperPrevious>Back</button>
           <button mat-button matStepperNext>Next</button>
         </div>
      </form>
   </mat-step>
   <mat-step>
      <ng-template matStepLabel>Done</ng-template>
         Details taken.
      <div>
         <button mat-button matStepperPrevious>Back</button>
         <button mat-button (click) = "stepper.reset()">Reset</button>
      </div>
   </mat-step>
</mat-horizontal-stepper>

以下是修改后的ts文件app.component.ts的内容。

import { Component } from '@angular/core';
import { FormControl } from "@angular/forms";
import { FormGroup } from "@angular/forms";
import { FormBuilder } from "@angular/forms";
import { Validators } from "@angular/forms";
export interface Food {
   value: string;
   display: string;
}
@Component({
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css']
})
export class AppComponent {
   title = 'materialApp';   
   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]
      });
   }
}