如何用Angular中的observable初始化Typescript数组接口

import { Observable } from 'rxjs';

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

@Injectable({
  providedIn: 'root'
})
export class DataService {
  private data: any[] = []; // 初始化空数组

  constructor() { }

  getData(): Observable<any[]> {
    // 模拟异步获取数据
    return new Observable<any[]>(observer => {
      setTimeout(() => {
        // 假设从服务器获取到了数据
        this.data = ['数据1', '数据2', '数据3'];
        observer.next(this.data);
        observer.complete();
      }, 2000);
    });
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from 'path/to/data.service';

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

  constructor(private dataService: DataService) { }

  ngOnInit(): void {
    this.dataService.getData().subscribe(data => {
      this.data = data;
    });
  }
}

<ul>
  <li *ngFor="let item of data">{{ item }}</li>
</ul>