angular6中formGroup嵌套formArray

【前提】

本项目中使用的框架：angular6 + ng-zorro-antd 1.8.x；

要想在表单中使用formGroup,必须先引入ReactiveFormsModule，否则会报错；

在app.module.ts中引入的同时还需在最近的module.ts文件中引入（看百度只需在app.module.ts中引入即可，但是在本项目中不生效）。

import { FormsModule, ReactiveFormsModule } from '@angular/forms';
@NgModule({
  imports: [FormsModule, ReactiveFormsModule],
  exports: [],
  declarations: [],
  providers: [],
})

 【正文】

formBuilder、formControl、formGroup及formArray的用法自行百度吧，下面直接贴代码：

html:

<form nz-form [formGroup]="validateForm" (ngSubmit)="submitForm()">
      <div class="process-item">
        <label>日期</label>
        <div>
          <nz-form-item>
            <nz-form-control>
              <nz-date-picker formControlName="startTime" nzPlaceHolder="开始日期"></nz-date-picker>
              <div nz-form-explain class="error" *ngIf="validateForm.controls.startTime.dirty&&validateForm.controls.startTime.hasError('required')">开始日期不能为空</div>
            </nz-form-control>
          </nz-form-item>
          <span></span>
          <nz-form-item>
            <nz-form-control>
              <nz-date-picker formControlName="endTime" nzPlaceHolder="结束日期"></nz-date-picker>
              <div nz-form-explain class="error" *ngIf="validateForm.controls.endTime.dirty&&validateForm.controls.endTime.hasError('required')">结束日期不能为空</div>
            </nz-form-control>
          </nz-form-item>
        </div>
      </div>
      <div class="process-item">
        <label>组合</label>
        <div formArrayName="testArr">
          <div><span class="add-btn" (click)="addItem()"><i class="icon-cmbnt icon-add"></i>添加</span></div>
          <div *ngFor="let item of testArrFormArray.controls;let i = index;" [formGroupName]="i">
            <nz-form-item>
              <nz-form-control>
                <nz-select style="100%" formControlName="etcName" nzAllowClear nzPlaceHolder="请选择场次">
                  <nz-option *ngFor="let option of testArrCopy" [nzLabel]="option" [nzValue]="option"></nz-option>
                </nz-select>
                <div nz-form-explain class="error" *ngIf="item.controls['etcName'].dirty&&item.controls['etcName'].hasError('required')">场次不能为空</div>
              </nz-form-control>
            </nz-form-item>
            <span></span>
            <nz-form-item>
              <nz-form-control>
                <nz-date-picker nzFormat="MM-dd" formControlName="date" nzPlaceHolder="结束日期"></nz-date-picker>
                <div nz-form-explain class="error" *ngIf="item.controls['date'].dirty&&item.controls['date'].hasError('required')">结束日期不能为空</div>
              </nz-form-control>
            </nz-form-item>
            <i *ngIf="i>0" (click)="delItem(i)" class="icon-cmbnt icon-del"></i>
          </div>
        </div>
      </div>
      <nz-form-item class="footer-btn">
        <nz-form-control nz-col>
          <button nz-button nzType="primary" class="mr-14">提交</button>
          <button nz-button nzType="primary-empty" (click)="resetForm($event)">重置</button>
        </nz-form-control>
      </nz-form-item>
    </form>

 ts:

import { Component, OnInit, ViewChild, Pipe, PipeTransform } from '@angular/core';
import { FormBuilder, FormGroup, Validators, FormControl, FormArray } from '@angular/forms';

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

export class TestComponent implements OnInit {
    validateForm: FormGroup;
    testArryCopy = [];
    constructor(private fb: FormBuilder, private route: ActivatedRoute) {
        this.validateForm = this.fb.group({
            startTime: [null, [Validators.required]],
            endTime: [null, [Validators.required]],
            testArr: this.fb.array([
                new FormGroup({
                    etcName: new FormControl(null, Validators.required),
                    date: new FormControl(null, Validators.required)
                })
            ])
        });
    }
    //需要将testArr的属性实例成一个FormArray
    get testArrFormArray() {
        return this.validateForm.controls['testArr'] as FormArray;
    }

    creatRow() {
        return this.fb.group({
      　    etcName: [null, [Validators.required]],
      　    date: [null, [Validators.required]]
        });
    }

    //新增组合
    addItem(){
        this.testArrFormArray.push(this.creatRow());
    }
    //刪除组合
    delItem(i) {
        this.testArrFormArray.removeAt(i);
    }
　　 //提交表单
    submitForm() {
        Object.keys(this.validateForm.controls).map(i => {
            if (i) {
                this.validateForm.controls[i].markAsDirty();
                this.validateForm.controls[i].updateValueAndValidity();
            }
        });
        this.testArrFormArray.controls.forEach(v => {
            Object.keys(v['controls']).map(key => {
                if (v['controls'][key]) {
                    v['controls'][key].markAsDirty();
                    v['controls'][key].updateValueAndValidity();
                }
            });
        });
        if (this.validateForm.valid) {
          ...
        }
    }
    //重置表单
    resetForm(e: MouseEvent): void {
        e.preventDefault();
        this.clearForm();
    }
    clearForm() {
        this.validateForm.reset();
        for (const key in this.validateForm.controls) {
          this.validateForm.controls[key].markAsPristine();
          this.validateForm.controls[key].updateValueAndValidity();
        }
        this.bishiArrFormArray.controls.forEach(v => {
            Object.keys(v['controls']).map(key => {
               if (v['controls'][key]) {
                   v['controls'][key].markAsPristine();
                   v['controls'][key].updateValueAndValidity();
               }
            });
        });
    }
}

 鄙人不才，欢迎补充。