Zero Coordinate Location Manager

Question

The following code gives the zero coordinates. The strange thing is that UIAlert, offering the application to use the current location, does not appear for long before the user can select "Yes."

My code that I used:

CLLocationManager *locationManager;
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
[locationManager startUpdatingLocation];
locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter = kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
[locationManager startUpdatingLocation];
float latitude = locationManager.location.coordinate.latitude;
float longitude = locationManager.location.coordinate.longitude;
NSLog(@"%.8f",latitude);
NSLog(@"%.8f",longitude);

NSLog prints 0.0000000for both coordinates.

Thanks!

Answer 1

The reason you get 0 is because the location manager did not collect any data at this point (he thought)

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// Inside .m file

@interface MyClass () <CLLocationManagerDelegate> // Declare this class to implement protocol CLLocationManagerDelegate

@property (strong, nonatomic) CLLocationManager* locationManager; // Retains it with strong keyword

@end

@implementation MyClass

// Inside some method

   self.locationManager = [[CLLocationManager alloc] init];
   self.locationManager.delegate = self;
   self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
   self.locationManager.distanceFilter = kCLDistanceFilterNone;
   [self.locationManager startUpdatingLocation];

// Delegate method
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    CLLocation* loc = [locations lastObject]; // locations is guaranteed to have at least one object
    float latitude = loc.coordinate.latitude;
    float longitude = loc.coordinate.longitude;
    NSLog(@"%.8f",latitude);
    NSLog(@"%.8f",longitude);
}