在angular中如何从简单的对话框模型中从api调用中返回值？

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

@Injectable({
  providedIn: 'root'
})
export class ApiService {
  constructor(private http: HttpClient) {}

  getData(): Observable<any> {
    return this.http.get('api-url');
  }
}

import { Component } from '@angular/core';
import { ApiService } from './api.service';

@Component({
  selector: 'app-example',
  template: `
    <button (click)="getData()">Get Data</button>
  `
})
export class ExampleComponent {
  constructor(private apiService: ApiService) {}

  getData(): void {
    this.apiService.getData().subscribe(
      (response) => {
        // 处理返回的数据
        console.log(response);
      },
      (error) => {
        // 处理错误
        console.error(error);
      }
    );
  }
}