问跨两个同级组件更新后返回旧值的BehaviourSubject

EN

import {Injectable} from '@angular/core';
import {Video} from '../../assets/video';
import { BehaviorSubject} from 'rxjs/BehaviorSubject';

declare var window: any;

@Injectable()
export class VideoService {

  videoArray: Video[];
  private filteredVideoArray = new BehaviorSubject<Video[]>(window.videos);

  currentMessage = this.filteredVideoArray.asObservable();

  constructor() {
    this.videoArray = window.videos;
  }

  getVideos(): Video[] {
    return this.videoArray;
  }

  updateFilteredVideos(message: Video[]) {
    this.filteredVideoArray.next(message);
    console.log(this.filteredVideoArray.getValue());

  }

  getFilteredVideos(): Video[] {
    console.log(this.filteredVideoArray.getValue());
    return this.filteredVideoArray.getValue();
  }
}

  ngOnInit() {
this.videoService.currentMessage.subscribe(message => this.videoArray = message);