使用ng-zorro时的module引入问题

问题来源：

当我尝试使用nzMessageService时

import {NzMessageService } from 'ng-zorro-antd/message';@Component({selector: 'app-xxxx',templateUrl: './ponent.html',styleUrls: ['./ponent.css']})export class xxxxxx implements OnInit {.........constructor(private nzMessageService: NzMessageService) {}

出现以下错误

core.js:6479 ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(AppModule)[NzMessageService -> NzMessageService -> NzMessageService]: NullInjectorError: No provider for NzMessageService!NullInjectorError: R3InjectorError(AppModule)[NzMessageService -> NzMessageService -> NzMessageService]: NullInjectorError: No provider for NzMessageService!

解决办法

在module的providers区域里，为NzMessageService维护具体的实现类：

@NgModule({declarations: [xxxxxxxx,],imports: [xxxxxxxx,],// 在这里加入providers: [{provide: NzMessageService}],bootstrap: [xxxxx]})