如何在angular 6中从一个函数到其他函数取值

function function1(value: any) {
  function2(value);
}

function function2(value: any) {
  console.log(value);
}

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

@Injectable()
export class DataService {
  private dataSubject = new BehaviorSubject<any>(null);
  public data$ = this.dataSubject.asObservable();

  setData(value: any) {
    this.dataSubject.next(value);
  }
}

import { DataService } from './data.service';

function function1(dataService: DataService) {
  dataService.setData(value);
}

function function2(dataService: DataService) {
  dataService.data$.subscribe(value => {
    console.log(value);
  });
}

const routes: Routes = [
  { path: 'component1/:value', component: Component1 },
  { path: 'component2/:value', component: Component2 }
];

import { Router } from '@angular/router';

function function1(router: Router, value: any) {
  router.navigate(['component2', value]);
}

import { ActivatedRoute } from '@angular/router';

function function2(route: ActivatedRoute) {
  route.params.subscribe(params => {
    console.log(params.value);
  });
}