Angular-Angular Material 2步进控件 [英] angular - Angular Material 2 Stepper Controls

问题描述

我使用Angular Material 2步进器设置了线性步进器.

I set up a linear stepper using the Angular Material 2 Stepper.

我在不同的组件(组件a，组件b，组件c)中有表单.我希望在我的主要容器组件(容器组件)中使用线性步进器，以在其形状有效时逐步"通过每个组件.

I have forms in different components (component-a, component-b, component-c). In my main container component (container-component) I want to have linear stepper that 'steps' through each component when their form is valid.

是否有某种功能可以与步进器中的stepControl对话以使其正常工作?

Is there some sort of functionality to talk up to the stepControl in the stepper to make it properly work?

我随附了步进器的文档和该应用程序的StackBlitz版本.另外，还有我也正在使用的回购链接.

I have attached documentation for the stepper and a StackBlitz version of the application. Also, a link to the repo I have working as well.

材料步进组件: https://material.angular.io/components/stepper/overview

StackBlitz: https://stackblitz. com/edit/angular-material2-issue-mjmu9u?file = app/app.component.ts

StackBlitz: https://stackblitz.com/edit/angular-material2-issue-mjmu9u?file=app/app.component.ts

Github: https://github.com/sam11385

推荐答案

我们遇到了完全相同的问题，经过数天的反复试验，找到了可行的解决方案.基本上，由于步骤分为几个组件，每个组件都定义一个表单，并且它们对应的stepControl必须在父组件中，因此子组件中的FormGroup必须发送到定义步进器的父组件中.创建FormGroup后，发出一个事件并使父级侦听该事件，并通过该事件传递FormGroup.您可以将其应用于所有子级，为每个子级创建一个单独的事件，并为每个发射器在父级中创建一个单独的侦听器.

We had the exact same problem, and found a working solution after several days of trial and error. Basically since the steps are divided into several components that each define a form, and that their corresponding stepControl must be in the parent, the FormGroup in the child component must be sent to the parent component that defines the stepper. After creating the FormGroup, emit an event and have the parent listen to that event, and pass the FormGroup through that event. You can apply this for all children, creating a separate event for each and a separate listener in the parent for each emitter.

1. 声明事件

1. declare the event

@Output() notify: EventEmitter<FormGroup> = new EventEmitter<FormGroup>();                                                                                                         

将formGroup发送到父组件

emit the formGroup to the parent component

this.notify.emit(this.myFormGroup);                                                                                                                                                

在包含mat-stepper的stepControl的父组件中:

1. 在组件(.ts)中，添加一个将接收并设置表单组的函数:

1. In the component(.ts), add a function that will receive and set the formgroup:

myFormGroup: FormGroup;
onNotify(formGroup: FormGroup): void {
  this.myFormGroup = formGroup;
}

在html中，添加通知侦听器:

In the html, add the notification listener:

<mat-step [completed]="false" [stepControl]="myFormGroup">
  <ng-template matStepLabel>Step 1</ng-template>
  <app-child (notify)='onNotify($event)'></app-child>
</mat-step>                                                                                                                                            

嵌套组件说明: https://www.themarketingtechnologist.co/building-nested-components-in-angular-2/

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