angular – 无法解析AuthenticationService的所有参数：([object Object],？,[object Object])

我已经检查了几乎每个主题,并尝试了多种方法来解决它,但仍然无法在第二天击败它.

我试图像这样在appservice中注入第一个authservice但是得到了同样的错误

@Inject(forWARDRef(() => AuthenticationservicE)) public authservice: Authenticationservice

我检查了所有DI和服务内部的导入顺序,在我看来一切都是正确的

如果有人可以帮我处理它,我很感激.

Angular 4.0.0

Authservice

import { Injectable } from '@angular/core';
import {http,Headers,ResponsE} from '@angular/http';
import 'rxjs/add/operator/toPromise';
import {ObservablE} from 'rxjs/Rx';

import {Appservices} from "../../app.services";
import {Router} from "@angular/router";

@Injectable()
export class Authenticationservice {
  public token: any;

  constructor(
    private http: http,private appservice: Appservices,private router: Router
  ) {
    this.token = localStorage.getItem('token');
  }

  login(username: String,password: String): Observable<Boolean> {
    let headers = new Headers();
    let body = null;
    headers.append("Authorization",("Basic " + btoa(username + ':' + password)));

    return this.http.post(this.appservice.api + '/login',body,{headers: headers})
      .map((response: ResponsE) => {
        let token = response.json() && response.json().token;
        if (token) {
          this.token = token;
          localStorage.setItem('Conform_token',token);
          return true;
        } else {
          return false;
        }
      });
  }

  logout(): void {
    this.token = null;
    localStorage.removeItem('Conform_token');
    this.router.navigate(['/login']);
  }
}

应用服务

import {InjectablE} from '@angular/core';
import {Headers,http,requestOptions} from '@angular/http';
import {Router} from "@angular/router";
import {AuthenticationservicE} from "./auth/auth.service";

import 'rxjs/add/operator/toPromise';
import {ObservablE} from 'rxjs/Rx';

@Injectable()

export class Appservices {

  api = '//endpoint/';

  public options: any;
  constructor(
    private http: http,private router: Router,public authservice: Authenticationservice // doesn't work
  //  @Inject(forWARDRef(() => AuthenticationservicE)) public authservice: Authenticationservice // doesn't work either
      ) {
        let head = new Headers({
      'Authorization': 'Bearer ' + this.authservice.token,"Content-Type": "application/json; charset=utf8"
    });
    this.options = new requestOptions({headers: heaD});
  }

  // ====================
  //    data services
  // ====================

  getData(): Promise<any> {
    return this.http
      .get(this.api + "/data",this.options)
      .toPromise()
      .then(response => response.json() as Array<Object>)
      .catch((err)=>{this.handleError(err);})
  }

应用模块

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import {BaserequestOptions,httpR_697_11845@odulE} from '@angular/http';

import { MaterialModulE} from '@angular/material';
import {FlexLayoutModulE} from "@angular/flex-layout";
import 'hAMMerjs';

import { routIng,appRoutIngProviders }  from './app.routIng';
import { Appservices } from './app.services';
import {AuthGuarD} from "./auth/auth.guard";
import {AuthenticationservicE} from "./auth/auth.service";

import {AppComponent} from './app.component';
import {AuthComponent} from './auth/auth.component';
import {NotFoundComponent} from './404/not-found.component';
import { HomeComponent } from './home/home.component';

@NgModule({
  declarations: [
    AppComponent,AuthComponent,NotFoundComponent,HomeComponent
  ],imports: [
    BrowserModule,BrowserAnimationsModule,FormsModule,httpR_697_11845@odule,routIng,MaterialModule,FlexLayoutModule
  ],providers: [Appservices,AuthGuard,Authenticationservice],bootstrap: [AppComponent]
})
export class AppModule { }