Angular 4 FormGroup -将父窗体控件传递给子组件

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

@Component({
  selector: 'app-parent',
  template: `
    <app-child [parentForm]="myForm"></app-child>
  `
})
export class ParentComponent {
  myForm: FormGroup;

  constructor() {
    this.myForm = new FormGroup({
      name: new FormControl(''),
      email: new FormControl('')
    });
  }
}

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

@Component({
  selector: 'app-child',
  template: `
    <div [formGroup]="parentForm">
      <input type="text" formControlName="name">
      <input type="email" formControlName="email">
    </div>
  `
})
export class ChildComponent {
  @Input() parentForm: FormGroup;
}