错误描述

当form表单加FormGroup属性时报错 Can’t bind to ‘formGroup’ since it isn’t a known property of ‘form’

 <form nz-form [formGroup]="valForm" (ngSubmit)="submit()" role="form">
                <div nz-form-item>
                    <div nz-form-control [nzValidateStatus]="valForm.controls.email">
                        <nz-input formControlName="email" [nzPlaceHolder]="'邮箱'" [nzSize]="'large'">
                            <ng-template #suffix>
                                <i class="anticon anticon-mail"></i>
                            </ng-template>
                        </nz-input>
                        <div nz-form-explain *ngIf="valForm.controls.email.dirty&&valForm.controls.email.hasError('required')">邮箱必填</div>
                    </div>
                </div>
                <div nz-form-item>
                    <div nz-form-control [nzValidateStatus]="valForm.controls.password">
                        <nz-input formControlName="password" [nzPlaceHolder]="'密码'" [nzType]="'password'" [nzSize]="'large'">
                            <ng-template #suffix>
                                <i class="anticon anticon-lock"></i>
                            </ng-template>
                        </nz-input>
                        <div nz-form-explain *ngIf="valForm.controls.password.dirty&&valForm.controls.password.hasError('required')">密码必填</div>
                    </div>
                </div>
                <div nz-form-item nz-row>
                    <div nz-col [nzSpan]="12">
                        <label nz-checkbox formControlName="remember_me">
                            <span>记住密码</span>
                        </label>
                    </div>
                    <div nz-col [nzSpan]="12" class="text-right">
                        <a [routerLink]="['/forget']">注册</a>
                    </div>
                </div>
                <div nz-form-item nz-row>
                    <div nz-col [nzSpan]="24">
                        <button nz-button [disabled]="!valForm.valid" [nzType]="'primary'" [nzSize]="'large'" class="ant-btn__block">
                            <span>登录</span>
                        </button>
                    </div>
                </div>
            </form>

原因分析与解决方案

在使用form表单时，如果用到了form-group与formControlName，需要在app.module.ts中的import引入的不仅仅有FormsModule，还要引入ReactiveFormsModule。如果是懒加载，则按需在各自的module中引入。如下：

import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';
import { ReactiveFormsModule, FormsModule } from '@angular/forms';
import { LoginComponent } from './login/login.component';

@NgModule({
    imports: [
        CommonModule,
        FormsModule,
        ReactiveFormsModule
           ],
    declarations: [
        LoginComponent
    ],
    providers: [
    ]
})
export class AccountModule {

}