Adèle Dunand Adèle Dunand - 1 year ago 79
Objective-C Question

Location authorization issue in Objective C

I have an issue showing user locations in objective C.
I tried everything i could find here in stackoverflow, aaaand, didn't work.

So I have that code :

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
MKPointAnnotation *myAnnotation = [[MKPointAnnotation alloc]init];

locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
locationManager.distanceFilter = 10.0;
[locationManager startUpdatingLocation];
[locationManager requestWhenInUseAuthorization];
[locationManager requestAlwaysAuthorization];

myAnnotation.coordinate = mapView.userLocation.location.coordinate;

myAnnotation.title = @"Test";
myAnnotation.subtitle = @"I am a test Subtitle";

[self.mapView addAnnotation:myAnnotation];

-(void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation {
[self.mapView setCenterCoordinate:userLocation.coordinate animated:YES];

Everything is in ViewController.m, more precisely in a mapView declared in my .h file:

@property (strong, nonatomic) IBOutlet MKMapView *mapView;

Does anyone have any idea ? The error i have is that:

Trying to start MapKit location updates without prompting for location authorization. Must call -[CLLocationManager requestWhenInUseAuthorization] or -[CLLocationManager requestAlwaysAuthorization] first.

Thanks :)

Answer Source

I can't post this as a comment so i'll post it here.

You can simply open your Info.plist file in TextEdit and add these lines.

<string>App needs to use GPS to keep track of your activity</string>
<string>App needs to use GPS to keep track of your activity</string>


I see that your locationManager is a local method variable. It should declared be as an instance variable or as a property.