objective-cauthorizationmkmapviewuserlocation

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 :

-(void)setLocation
{
    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 :)

Solution

  • 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.

    <key>UIBackgroundModes</key>
<array>
    <string>location</string>
    <string>external-accessory</string>
    <string>remote-notification</string>
</array>
<key>NSLocationUsageDescription</key>
<string>App needs to use GPS to keep track of your activity</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>App needs to use GPS to keep track of your activity</string>
<key>UIRequiredDeviceCapabilities</key>
<array>
    <string>armv7</string>
    <string>gps</string>
</array>

    EDIT:

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