A guide to retrieving location markers from Firebase's real-time database and displaying them on a map view using Xcode and Swift

My objective is to replace the hardcoded array data with a download from Firebase Realtime Database and store it in either 4 separate arrays or an array of another array for each night club.

The structure of the Firebase Realtime Database JSON can be found here.

As I am new to Firebase, I haven't attempted much yet. Any guidance on how to achieve this would be highly appreciated.

// ViewControllerThree.swift
import Foundation
import UIKit
import MapKit
import CoreLocation
import FirebaseDatabase

class ViewControllerThree: UIViewController, CLLocationManagerDelegate, UITableViewDataSource, UITableViewDelegate { // new last 2

@IBOutlet weak var clubInfo: UIView!
@IBOutlet weak var mapView: MKMapView!

@IBOutlet weak var miniTableView: UITableView! // new

var locationManager = CLLocationManager()
var artworks: [Artwork] = []

var nightClubs = [NightClubs]() // new new

override func viewDidLoad() {
    super.viewDidLoad()
    miniTableView.dataSource = self
    miniTableView.delegate = self

    // Replace getLocations() with pullLocations() method as it streamlines the code significantly and provides dynamic functionality.
    
    DataService.ds.REF_BARS.observeSingleEvent(of: .value, with: { (snapshot) in
        print(snapshot.value as Any)
        if let snapshot = snapshot.children.allObjects as? [DataSnapshot] {
            for snap in snapshot {
                print(snap)
                if let barData = snap.value as? Dictionary<String, AnyObject> {
                    let bar = NightClubs(barData: barData)
                    self.nightClubs.append(bar)
                    print(self.nightClubs)
                    self.miniTableView.reloadData()
                }
                self.miniTableView.reloadData()
            }
            self.miniTableView.reloadData()
        }
        self.miniTableView.reloadData()
    })
    clubInfo.layer.cornerRadius = 4

    // Code related to map handling and location services below...

}
// Additional methods and functions continue here...

I aim to swap out the getLocations() function with pullLocations() to achieve better efficiency and code maintenance by reducing around 100 lines of code.

Answer №1

Instead of using the old tableView forRowAt function, you can update it with the following code:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "countCell") as! countCell
    let nightClub: NightClubs
    nightClub = nightClubs[indexPath.row]

    let artwork = Artwork(title: nightClub.name,
                          locationName: nightClub.location,
                          discipline: nightClub.type,
                          coordinate: CLLocationCoordinate2D(latitude: Double(nightClub.latitude)!, longitude: Double(nightClub.longitude)!)
    )
    mapView.addAnnotation(artwork)
    cell.goingCountLabel.text = nightClub.goingCount
    cell.liveCountLabel.text = nightClub.liveCount
    return cell
}

Make sure to remove any hardcoded Artwork objects and their relations.

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