LocationHelper

LocationHelper.h

#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>

typedef void (^ CallbackBlock)(float, float, NSError*);
@interface LocationHelper : NSObject <CLLocationManagerDelegate>
+ (LocationHelper*) instance;
- (void) getLocation:(CallbackBlock)block;
@end

LocationHelper.m

#import "LocationHelper.h"

@interface LocationHelper ()
@property (nonatomic) CLLocationManager* locationManager;
@property (copy) CallbackBlock callback;
@property (nonatomic) float lat;
@property (nonatomic) float lng;
@end

@implementation LocationHelper

+ (LocationHelper*) instance {
    static LocationHelper *instance;
    
    @synchronized(self)
    {
        if (!instance)
            instance = [[LocationHelper alloc] init];
        
        return instance;
    }
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    self.lat = newLocation.coordinate.latitude;
    self.lng = newLocation.coordinate.longitude;
    [manager stopUpdatingLocation];
    
    self.callback(self.lat, self.lng, nil);
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    self.callback(self.lat, self.lng, error);
}

- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
    switch (status) {
        case kCLAuthorizationStatusDenied:
            break;
        
        case kCLAuthorizationStatusRestricted:
            break;
            
        default:
            break;
    }
}

- (void) getLocation:(CallbackBlock)block {
    if (!self.locationManager) {
        self.locationManager = [[CLLocationManager alloc] init];
    }
    
    self.locationManager.delegate = self;
    self.callback = block;
    
    [self.locationManager startUpdatingLocation];
}

@end

Thanks for a great helper class! I love it!

I have this helper included in my AppDelegate with this code:

AppDelegate.h:
@Property (nonatomic, strong, readonly) CoreLocationHelper *coreLocationHelper;

• (CoreLocationHelper *)clh;

AppDelegate.m:

• (CoreLocationHelper *)clh
  {
  if (!_coreLocationHelper) {
  static dispatch_once_t predicate;
  dispatch_once(&predicate, ^{
  _coreLocationHelper = [CoreLocationHelper new];
  });
  }
  return _coreLocationHelper;
  }

And in my ViewController I access it like this:

CoreLocationHelper *clh = [(AppDelegate *)[[UIApplication sharedApplication] delegate] clh];
[clh getLocation:^(float latitude, float longitude, NSError *error){
if(&error){
NSLog(@"Uups %@",&error);
} else {
CLLocation *thisLocation = [[CLLocation alloc] initWithLatitude:latitude longitude:longitude];
}
}];