iOS 8 MKMapView User Location Request Failure

Question

I have been trying to move my iOS7 app with MKMapview to support iOS8. However I couldn't get the new request for users to share their locations to work properly. I create my MKMapView on a storyboard and the delegate is set and works perfectly on iOS7. Here is what I've added to support iOS8 Location sharing:

myMapView.h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>

@interface myMapView : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate>

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

myMapView.m

//Code omitted
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
//Code omitted
- (void)viewDidLoad {
    [super viewDidLoad];
    self.locationManager = [[CLLocationManager alloc] init];
    self.locationManager.delegate = self;

    if(IS_OS_8_OR_LATER) {
        //[self.locationManager requestWhenInUseAuthorization];
        [self.locationManager requestAlwaysAuthorization];
        [self.locationManager startUpdatingLocation];
    }
    [self.mapView setShowsUserLocation:YES];
    [self.mapView setUserTrackingMode:MKUserTrackingModeFollow animated:YES];
}

-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    MKCoordinateRegion region = { { 0.0, 0.0 }, { 0.0, 0.0 } };
    region.center.latitude = self.locationManager.location.coordinate.latitude;
    region.center.longitude = self.locationManager.location.coordinate.longitude;
    region.span.latitudeDelta = 0.0187f;
    region.span.longitudeDelta = 0.0137f;
    [self.mapView setRegion:region animated:YES];

    _initialPosition = NO;
}

Also I have set NSLocationAlwaysUsageDescription key and its value in my InfoPlist, which shows the correct message when prompting the user to share their location.

Unfortunately the delegate function -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations never gets called. Although each time the viewController gets loaded the [self.locationManager startUpdatingLocation] is called, but the delegate does not seem to respond to it. Is there a problem of how I set the delegate or is there something else I am missing here?

UPDATE: It seems also that my gpx file is not being called on launch. I have cleared and reloaded my location file, even changed to a default location, but no location is found: Domain=kCLErrorDomain Code=0

UPDATE 2: Here is a SS from the settings that I have actually succeeded with the user request, but fail to get/update location no matter how much I refresh. App privacy level: Location sharing always http://barisaltop.com/location.png

Thanks!

Answer 1

I had the same problem a few days ago. The solution was adding the string keys NSLocationAlwaysUsageDescription (for [CLLocationManager requestAlwaysAuthorization]) or NSLocationWhenInUseUsageDescription (for [CLLocationManager requestWhenInUseAuthorization]) to your Supporting Files/Info.plist

You can also edit the source code of the Info.Plist with Right click > open as > Source code and add these lines:

<!-- for requestAlwaysAuthorization -->
<key>NSLocationAlwaysUsageDescription</key>
<string>Explain for what are you using the user location</string>
<!-- for requestWhenInUseAuthorization -->
<key>NSLocationWhenInUseUsageDescription</key>
<string>Explain for what are you using the user location</string>

Hope this helps.

Answer 2

Finally I have succeeded to run my gpx file on the simulator. It seems that after installing Xcode 6 the first time, there might be a bug causing for gpx files to simulate. Here is how I overcame the problem:

1. I have deleted my app from the simulator
2. Under App->Capabilities enabled Background Modes->Location updates
3. Run the app and let it install on simulator
4. Allow access, and I was able to locate the user with GPX
5. Afterwards I disabled Location Updates.

I don't know why, but this did the trick for me.