如何在angular中重新加载/重新启动服务？

import { Component, OnInit, OnDestroy } from '@angular/core';
import { MyService } from './my.service';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent implements OnInit, OnDestroy {
  constructor(private myService: MyService) {}

  ngOnInit() {
    this.myService.loadData();
  }

  ngOnDestroy() {
    this.myService.reset();
  }
}

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

@Injectable({
  providedIn: 'root'
})
export class MyService {
  private data: any;

  loadData() {
    // 模拟数据加载
    this.data = { /* ... */ };
  }

  reset() {
    this.data = null;
  }
}

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

@Injectable({
  providedIn: 'root'
})
export class MyService {
  private data: any;

  loadData() {
    // 模拟数据加载
    this.data = { /* ... */ };
  }

  reset() {
    this.data = null;
  }

  getData() {
    return this.data;
  }
}

import { Component } from '@angular/core';
import { MyService } from './my.service';

@Component({
  selector: 'app-my-component',
  templateUrl: './my-component.component.html',
  styleUrls: ['./my-component.component.css']
})
export class MyComponent {
  constructor(private myService: MyService) {}

  reloadService() {
    this.myService.reset();
    this.myService.loadData();
  }
}