Check if location services are enabled

Question

I've been doing some research about CoreLocation. Recently, I encountered a problem that has been covered elsewhere, but in Objective C, and for iOS 8.

I feel kinda silly asking this, but how can you check if location services are enabled using swift, on iOS 9?

On iOS 7 (and maybe 8?) you could use locationServicesEnabled(), but that doesn't appear to be working when compiling for iOS 9.

So how would I accomplish this?

Thanks!

Answer 1

When you call -startLocation, if location services were denied by the user, the location manager delegate will receive a call to - locationManager:didFailWithError: with the kCLErrorDenied error code. This works both in all versions of iOS.

Answer 2

SWIFT (As of July 24, 2018)

if CLLocationManager.locationServicesEnabled() {

}

this will tell you if the user has already selected a setting for the app's location permission request

Answer 3

For swift3.0 and above , if frequent checks are made for the availability of location services, create a class like below,

    import CoreLocation

    open class Reachability {
        class func isLocationServiceEnabled() -> Bool {
            if CLLocationManager.locationServicesEnabled() {
                switch(CLLocationManager.authorizationStatus()) {
                    case .notDetermined, .restricted, .denied:
                    return false
                    case .authorizedAlways, .authorizedWhenInUse:
                    return true
                    default:
                    print("Something wrong with Location services")
                    return false
                }
            } else {
                    print("Location services are not enabled")
                    return false
              }
            }
         }

and then use it like this in your VC

    if Reachability.isLocationServiceEnabled() == true {
    // Do what you want to do.
    } else {
    //You could show an alert like this.
        let alertController = UIAlertController(title: "Location 
        Services Disabled", message: "Please enable location services 
        for this app.", preferredStyle: .alert)
        let OKAction = UIAlertAction(title: "OK", style: .default, 
        handler: nil)
        alertController.addAction(OKAction)
        OperationQueue.main.addOperation {
            self.present(alertController, animated: true, 
            completion:nil)
        }
    }

Answer 4

In objective-c

you should track user already denied or not determined then ask for permission or sent user to Setting app.

-(void)askEnableLocationService
{
   BOOL showAlertSetting = false;
   BOOL showInitLocation = false;

   if ([CLLocationManager locationServicesEnabled]) {

      switch ([CLLocationManager authorizationStatus]) {
        case kCLAuthorizationStatusDenied:
            showAlertSetting = true;
            NSLog(@"HH: kCLAuthorizationStatusDenied");
            break;
        case kCLAuthorizationStatusRestricted:
            showAlertSetting = true;
            NSLog(@"HH: kCLAuthorizationStatusRestricted");
            break;
        case kCLAuthorizationStatusAuthorizedAlways:
            showInitLocation = true;
            NSLog(@"HH: kCLAuthorizationStatusAuthorizedAlways");
            break;
        case kCLAuthorizationStatusAuthorizedWhenInUse:
            showInitLocation = true;
            NSLog(@"HH: kCLAuthorizationStatusAuthorizedWhenInUse");
            break;
        case kCLAuthorizationStatusNotDetermined:
            showInitLocation = true;
            NSLog(@"HH: kCLAuthorizationStatusNotDetermined");
            break;
        default:
            break;
      }
   } else {

      showAlertSetting = true;
      NSLog(@"HH: locationServicesDisabled");
  }

   if (showAlertSetting) {
       UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:@"Please enable location service for this app in ALLOW LOCATION ACCESS: Always, Go to Setting?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Open Setting", nil];
       alertView.tag = 199;
       [alertView show];
   }
   if (showInitLocation) {
       [self initLocationManager];
   }

}

Implement alertView Delegate then sent user to enable location service if already deny by user.

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

   if (alertView.tag == 199) {
       if (buttonIndex == 1) {
           [[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
       }
       return;
   }
}

Init Location Manager

-(void)initLocationManager{
   self.locationManager = [[CLLocationManager alloc] init];
   if([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
       [self.locationManager requestAlwaysAuthorization];
   }
}

Please note kCLAuthorizationStatusAuthorizedAlways and kCLAuthorizationStatusAuthorizedWhenInUse is difference.

Answer 5

It is just a 2 line function in Swift 4:

import CoreLocation

static func isLocationPermissionGranted() -> Bool
{
    guard CLLocationManager.locationServicesEnabled() else { return false }
    return [.authorizedAlways, .authorizedWhenInUse].contains(CLLocationManager.authorizationStatus())
}

Answer 6

In Swift 3.0

if (CLLocationManager.locationServicesEnabled())
            {
                locationManager.delegate = self
                locationManager.desiredAccuracy = kCLLocationAccuracyBest
                if ((UIDevice.current.systemVersion as NSString).floatValue >= 8)
                {
                    locationManager.requestWhenInUseAuthorization()
                }

                locationManager.startUpdatingLocation()
            }
            else
            {
                #if debug
                    println("Location services are not enabled");
                #endif
            }