How to check if user clicks no on NSLocationAlwaysAndWhenInUseUsageDescription Swift 3.2

Question

When user is on MainViewController

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

viewDidLoad() will run and the alert will appear

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
        <string>Accessing user location to determine the nearest pickup location</string>
        <key>NSLocationWhenInUseUsageDescription</key>
        <string>Accessing user location to determine the nearest pickup location</string>

The main question is, if user clicks Don't allow, how do I check programmtically? for example

// Example code snippet, not from apple officials
if NSlocation is nil then I want to do some alert

https://developer.apple.com/documentation/corelocation/cllocationmanagerdelegate/1423701-locationmanager — Paulw11, Nov 04 '17 at 05:07

Michael Hulet · Answer 1 · 2017-11-04T06:21:35.073

If the user chooses to deny your app access to location services, CLLocationManager.authorizationStatus() will be .denied (though you should also watch out for .restricted. If you'd like to be notified when the user chooses whether or not to allow or deny your app, you can make yourself your location manager's delegate and implement the proper method:

class MainViewController: CLLocationManagerDelegate{

    let locationManager = CLLocationManager()

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

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) -> Void{
        switch status{
            case .authorizedAlways, .authorizedWhenInUse:
                // You're allowed to use location services
            case .denied, .restricted:
                // You can't use location services
            default:
                // This case shouldn't be hit, but is necessary to prevent a compiler error
        }
    }
}

Just one more question if you don't mind, how do I direct the user to the settings of the app so that the user could toggle the location — sinusGob, Nov 04 '17 at 05:38

iVarun · Answer 2 · 2017-11-04T06:21:23.927

Use below delegate method of CLLocationManager to check user click on Don't allow button in permission alert.

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        switch status {
        case .denied:
           print("Show you own alert here")
            break
        }
    }

To redirect user in location settings follow below:

Add URL Types "prefs" like below image

Write this code on button action:

UIApplication.sharedApplication().openURL(NSURL(string:"prefs:root=LOCATION_SERVICES")!)

How to check if user clicks no on NSLocationAlwaysAndWhenInUseUsageDescription Swift 3.2

2 Answers2