将服务注入类（而不是组件）Angular2

Question

export class Product {

  id: number;
  name: string;
  manufacturer: string;

  constructor(product: any) {

    this.id = product.id;
    this.name = product.name;
    this.manufacturer = product.manufacturer;

}

let injector = ReflectiveInjector.resolveAndCreate([ProductService]);
this.productService = injector.get(ProductService);

谢谢

Answer 1

我也在与类似的问题作斗争，我最终做的是让这项服务成为一个单独的服务，也是一个角注射服务。

这样，您就可以通过DI注入Angular类，并调用静态getInstance()方法来获取该类的单例实例。

类似于这样：

import {Injectable} from "@angular/core";
@Injectable()
export class MyService {

  static instance: MyService;

  static getInstance() {
    if (MyService.instance) {
      return MyService.instance;
    }

    MyService.instance = new MyService();
    return MyService.instance;
  }

  constructor() {
    if (!MyService.instance) {
      MyService.instance = this;
    }
    return MyService.instance;
  }
}