iOS Request Permission to Use Location Services


Example

Check the app's authorization status with:

//Swift
let status: CLAuthorizationStatus = CLLocationManager.authorizationStatus()

//Objective-C
CLAuthorizationStatus status = [CLLocationManager authorizationStatus];

Test the status against the follow constants:

//Swift
switch status {
case .NotDetermined:
    // Do stuff
case .AuthorizedAlways:
    // Do stuff
case .AuthorizedWhenInUse:
    // Do stuff
case .Restricted:
    // Do stuff
case .Denied:
    // Do stuff
}

//Objective-C
switch (status) {
    case kCLAuthorizationStatusNotDetermined:
        
        //The user hasn't yet chosen whether your app can use location services or not.
        
        break;
        
    case kCLAuthorizationStatusAuthorizedAlways:
        
        //The user has let your app use location services all the time, even if the app is in the background.
        
        break;
        
    case kCLAuthorizationStatusAuthorizedWhenInUse:
        
        //The user has let your app use location services only when the app is in the foreground.
        
        break;
        
    case kCLAuthorizationStatusRestricted:
        
        //The user can't choose whether or not your app can use location services or not, this could be due to parental controls for example.
        
        break;
        
    case kCLAuthorizationStatusDenied:
        
        //The user has chosen to not let your app use location services.
        
        break;
        
    default:
        break;
}

Getting Location Service Permission While App is in Use

Location When In Use Usage Dialog

Simplest method is to initialize the location manager as a property of your root view controller and place the permission request in its viewDidLoad.

This brings up the alert controller that asks for permission:

//Swift
let locationManager = CLLocationManager()
locationManager.requestWhenInUseAuthorization()

//Objective-C
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
[locationManager requestWhenInUseAuthorization];

Add the NSLocationWhenInUseUsageDescription key to your Info.plist. The value will be used in the alert controller's message label.

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Getting Location Service Permission Always

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To ask for permission to use location services even when the app is not active, use the following call instead:

//Swift
locationManager.requestAlwaysAuthorization()

//Objective-C
[locationManager requestAlwaysAuthorization];

Then add the NSLocationAlwaysUsageDescription key to your Info.plist. Again, the value will be used in the alert controller's message label.

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