如何在Angular应用程序的rxjs观察值中存储状态？

import { Injectable } from '@angular/core';
import { BehaviorSubject } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class StateService {
  private stateSubject = new BehaviorSubject<any>(null);
  public state$ = this.stateSubject.asObservable();

  public setState(newState: any) {
    this.stateSubject.next(newState);
  }
}

import { Component, OnInit } from '@angular/core';
import { StateService } from 'path-to-state-service';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent implements OnInit {
  public state: any;

  constructor(private stateService: StateService) { }

  ngOnInit() {
    this.stateService.state$.subscribe(newState => {
      this.state = newState;
    });
  }
}

import { Component } from '@angular/core';
import { StateService } from 'path-to-state-service';

@Component({
  selector: 'app-another-component',
  templateUrl: './another-component.component.html',
  styleUrls: ['./another-component.component.css']
})
export class AnotherComponent {
  constructor(private stateService: StateService) { }

  public updateState() {
    const newState = { /* 新的状态 */ };
    this.stateService.setState(newState);
  }
}