Geofire和使用firebase和Angularfire进行查询

npm install angularfire2 firebase geofire

import { AngularFireModule } from '@angular/fire/compat';
import { AngularFireDatabaseModule } from '@angular/fire/compat/database';
import { environment } from '../environments/environment';

@NgModule({
  imports: [
    AngularFireModule.initializeApp(environment.firebaseConfig),
    AngularFireDatabaseModule
  ],
  // ...
})
export class AppModule { }

import { Injectable } from '@angular/core';
import { AngularFireDatabase } from '@angular/fire/compat/database';
import * as GeoFire from 'geofire';

@Injectable({
  providedIn: 'root'
})
export class LocationService {
  private geoFire: any;

  constructor(private db: AngularFireDatabase) {
    this.geoFire = new GeoFire(db.database.ref('locations'));
  }

  // 添加地理位置
  setLocation(userId: string, coords: { latitude: number, longitude: number }) {
    this.geoFire.set(userId, coords);
  }

  // 查询附近的用户
  getNearbyUsers(latitude: number, longitude: number, radius: number) {
    return this.geoFire.query({
      center: [latitude, longitude],
      radius: radius
    });
  }
}