angular - 类型 'subscribe' 上不存在属性 '() => Observable'

Question

服务文件

import { Observable } from 'rxjs/Rx';
import { Http,Response} from '@angular/http';
import { Injectable } from '@angular/core';
import 'rxjs/add/operator/Map';

@Injectable()
export class VideoService {

   private geturl = '/api/videos';
   constructor(private _http:Http) { }

   getvideos() {
       return this._http.get(this.geturl).map((response:Response) => {
          response.json()
       });
   }
}

这里是订阅方法显示这个错误的地方

import { VideoService } from '../video.service';
import { Component, OnInit } from '@angular/core';
import { Video } from '../video';
import { Observable } from 'rxjs/Observable';


@Component({
    selector: 'app-videocenter',
    templateUrl: './videocenter.component.html',
    styleUrls: ['./videocenter.component.css']
})
export class VideocenterComponent implements OnInit {
    videos: any;
    onselectvideo: Video;
    switch: boolean = false

    constructor(private videoserv: VideoService) {
        //console.log(this.videos);
    }
    onselect(vid: any) {
        this.switch = true;
        this.onselectvideo = vid;
        console.log(vid);
    }
    ngOnInit() {
         this.videos = this.videoserv.getvideos .subscribe((response) => {
             this.videos = response;
         });
    }

}

我有一个服务文件，我必须在其中调用我的 api 来获取 api，当我要在另一个类中订阅该方法时，我正在调用该服务方法 getvideos() 然后它显示该属性的错误“订阅”在类型 ()=> observable

上不存在

Answer 1

您没有调用 getVideos 方法。您正在对 getVideos 的函数引用而不是返回值调用 subscribe。在调用 getVideos() 之后调用 subscribe:

ngOnInit() {
    this.videoserv.getvideos().subscribe((response) => {
         this.videos = response
    });
}