ios – Black screen with no warnings when running code on iPhone

Please could you guys point out where i’m going wrong, i have cobbled this together as my first app on iOS and on the simulator it runs but gives no GPS data available, on an actual phone its just a black display.

After 4 hours of trying different things to no avail i’m stuck.

Not sure what other details to add.

import UIKit
import CoreLocation
import AVFoundation

class ViewController: UIViewController, CLLocationManagerDelegate {

let locationManager = CLLocationManager()
let debugLabel = UILabel()

override func viewDidLoad() {
    super.viewDidLoad()

    setupUI()
    setupLocationManager()
    startTimer()
}

func setupUI() {
    // Set up debug label
    debugLabel.frame = CGRect(x: 20, y: 100, width: view.frame.width - 40, height: 40)
    debugLabel.textAlignment = .center
    debugLabel.textColor = .black
    debugLabel.text = "No GPS data available"
    view.addSubview(debugLabel)
}

func setupLocationManager() {
    locationManager.delegate = self
    locationManager.requestAlwaysAuthorization()

    // Check if location services are available
    if CLLocationManager.locationServicesEnabled() {
        locationManager.startUpdatingHeading()
    } else {
        displayError(message: "Location services are not enabled. Please enable them in Settings.")
    }
}

func startTimer() {
    Timer.scheduledTimer(timeInterval: 1200, target: self, selector: #selector(triggerAnnouncement), userInfo: nil, repeats: true)
}

@objc func triggerAnnouncement() {
    locationManager.startUpdatingHeading()
}

func locationManager(_ manager: CLLocationManager, didUpdateHeading newHeading: CLHeading) {
    let heading = newHeading.trueHeading
    announceHeading(heading)

    // Update debug label with GPS data
    if let location = locationManager.location {
        let latitude = location.coordinate.latitude
        let longitude = location.coordinate.longitude
        debugLabel.text = "Heading: \(heading) degrees\nLatitude: \(latitude)\nLongitude: \(longitude)"
    }
}

func announceHeading(_ heading: CLLocationDirection) {
    let synthesizer = AVSpeechSynthesizer()
    let utterance = AVSpeechUtterance(string: "Current heading is \(heading) degrees")
    synthesizer.speak(utterance)
}

func displayError(message: String) {
    let alert = UIAlertController(title: "Error", message: message, preferredStyle: .alert)
    let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
    alert.addAction(okAction)
    present(alert, animated: true, completion: nil)
    }
}