Angular 未捕获错误 : Can't resolve all parameters for service

Question

我不明白为什么这项服务不起作用？是依赖关系有问题吗？

服务:

import { Http } from '@angular/http';

export class GetWeatherService {

    constructor(private http: Http) {}

    getWeather() {
        return this.http.get(link);
    }
}

和组件:

import { Component, OnInit } from '@angular/core';
import { GetWeatherService } from './get-weather.service';

@Component({
    selector: 'app-form',
    templateUrl: './form.component.html',
    styleUrls: ['./form.component.css'],
    providers: [GetWeatherService]
})
export class FormComponent implements OnInit {

    constructor(public getWeather: GetWeatherService) {}

    ngOnInit() {
        this.getWeather.getWeather();
    }
}

Answer 1

您需要使您的服务可注入(inject):

@Injectable()
export class GetWeatherService {
    //CODE
}