如何在ngOnInit中有条件地进行http调用

import { Component, OnInit } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent implements OnInit {
  shouldMakeHttpCall: boolean = true;
  responseData: any;

  constructor(private http: HttpClient) { }

  ngOnInit(): void {
    if (this.shouldMakeHttpCall) {
      this.http.get('https://api.example.com/data').subscribe(
        (data) => {
          this.responseData = data;
          // 处理返回的数据
        },
        (error) => {
          console.error(error);
          // 处理错误
        }
      );
    }
  }
}