angular - 我应该如何从另一个 Injectable 扩展 Injectable，并在 angular2 中进行多次注入(inject)？

Question

有没有可能做这样的事情？ (因为我尝试过，但没有成功):

@Injectable()
class A {
  constructor(private http: Http){ // <-- Injection in root class
  }
  foo(){
    this.http.get()...
  };
}


@Injectable()
class B extends A{
  bar() {
    this.foo();
  }
}

Answer 1

有点 - 您必须对基类的构造函数进行 super 调用。只需传递所需的依赖项:

@Injectable()
class A {
  constructor(private http: Http){ // <-- Injection in root class
  }
  foo(){
    this.http.get()...
  };
}


@Injectable()
class B extends A{
  constructor(http: Http) {
    super(http);
  }

  bar() {
    this.foo();
  }
}

---

See this discussion, why there is no way around it.