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Ios swift – Can't show alert to user

In an iOS app, when the user denies location permission, I want to show an alert to give permission. I debug it and code works successfully but I can’t see any alert in the simulator.
I start the program and deny location permission. I then restart it and I can’t show any alert.

func checkLocationAuthorizationStatus() {
    let status = locationManager.authorizationStatus

    switch status{
    case .authorizedWhenInUse, .authorizedAlways: //eğer iki izinden biri alınmış ise burası çalışıcak
        locationManager.startUpdatingLocation()
    case .denied, .restricted: //red yemiş ise burası çalışıcak
        showLocationAccessAlert()
    case .notDetermined: //henüz konum izni vermemiş
        locationManager.requestWhenInUseAuthorization()
    @unknown default:
        break
    }
}

func showLocationAccessAlert() {
    let alert = UIAlertController(
        title: "Konum Erişimi Gerekli",
        message: "Lütfen Ayarlar'dan konum iznini etkinleştirin.",
        preferredStyle: .alert
    )
    
    alert.addAction(UIAlertAction(title: "Ayarlar", style: .default) { _ in
        if let settingsURL = URL(string: UIApplication.openSettingsURLString) {
            UIApplication.shared.open(settingsURL, options: [:], completionHandler: nil)
        }
    })
    
    alert.addAction(UIAlertAction(title: "Vazgeç", style: .cancel, handler: nil))
    
    self.present(alert, animated: true, completion: nil)
}
Tags:

2

Answers


  1. 0

    The iOS simulator sometimes has issues with location permissions. Testing on a physical device.

    If the problem continues, please ensure the alert code is executed on the main thread.

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  2. 0

    Solution

    Use CLLocationManager.authorizationStatus (or locationManager.authorizationStatus in iOS 14+) to determine the current location permission status.
    Display an Alert: If the permission status is .denied or .restricted, show an alert that explains why location access is needed, with an option to open the app’s settings.
    Open App Settings: In the alert, add a button that opens the app’s settings where users can manually enable location permissions.

    import UIKit
import CoreLocation

class YourViewController: UIViewController, CLLocationManagerDelegate {
    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()
        locationManager.delegate = self
    }

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        checkLocationAuthorizationStatus()
    }

    func checkLocationAuthorizationStatus() {
        let status = locationManager.authorizationStatus

        switch status {
        case .authorizedWhenInUse, .authorizedAlways:
            locationManager.startUpdatingLocation()
        case .denied, .restricted:
            showLocationAccessAlert()
        case .notDetermined:
            locationManager.requestWhenInUseAuthorization()
        @unknown default:
            break
        }
    }

    func showLocationAccessAlert() {
        let alert = UIAlertController(
            title: "Location Access Required",
            message: "Please enable location permissions in Settings to use this feature.",
            preferredStyle: .alert
        )

        alert.addAction(UIAlertAction(title: "Settings", style: .default) { _ in
            if let settingsURL = URL(string: UIApplication.openSettingsURLString) {
                UIApplication.shared.open(settingsURL, options: [:], completionHandler: nil)
            }
        })

        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

        self.present(alert, animated: true, completion: nil)
    }

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        checkLocationAuthorizationStatus()
    }
}

    Additional Tips
    Test on a Real Device: Simulators sometimes behave inconsistently with location permissions, so testing on an actual device is recommended.

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