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Get GPS From Ipad using CLLocationManager

/ Published in: Objective C
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1. Step 1: add CoreLocation framework in Project Settings -> Build Phases -> Link Binary...
2. Step 2: include the CoreLocation.h file
3. implement the following codes
2.

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  1. // view controller .h file
  2.  
  3. #import <CoreLocation/CoreLocation.h>
  4. @interface StoreInputViewController : UIViewController <CLLocationManagerDelegate> {
  5.     ...
  6.     CLLocationManager *locationManager;
  7. }
  8.  
  9. - (void)locationManager:(CLLocationManager *)manager
  10.     didUpdateToLocation:(CLLocation *)newLocation
  11.            fromLocation:(CLLocation *)oldLocation;
  12.  
  13. // view controller .m file
  14.  
  15. // init the location manager in the viewDidLoad
  16. - (void)viewDidLoad
  17. {
  18.     [super viewDidLoad];
  19.  
  20.     // initialize the GPS
  21.     locationManager = [[CLLocationManager alloc] init];
  22.     locationManager.delegate = self;
  23.     locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
  24.     locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
  25. }
  26.  
  27. // check whether GPS is enabled
  28. - (BOOL) isGPSEnabled
  29. {
  30.     if (! ([CLLocationManager  locationServicesEnabled])
  31.         || ( [CLLocationManager  authorizationStatus] == kCLAuthorizationStatusDenied))
  32.     {
  33.         return NO;
  34.     }
  35.     return YES;
  36. }
  37.  
  38. // function to start capture GPS, we check settings first to see if GPS is disabled before attempting to get GPS
  39. - (void) getGPS
  40. {
  41.     if([self isGPSEnabled])
  42.     {
  43.         // Location Services is not disabled, get it now
  44.         [locationManager startUpdatingLocation];
  45.     }
  46.     else        
  47.     {
  48.         // Location Services is disabled, do sth here to tell user to enable it
  49.     }
  50. } 
  51.  
  52. // receiving the gps and stop it immediately (one time gps only for this example)
  53. - (void)locationManager:(CLLocationManager *)manager
  54.     didUpdateToLocation:(CLLocation *)newLocation
  55.            fromLocation:(CLLocation *)oldLocation
  56. {
  57.     int degrees = newLocation.coordinate.latitude;
  58.     double decimal = fabs(newLocation.coordinate.latitude - degrees);
  59.     int minutes = decimal * 60;
  60.     double seconds = decimal * 3600 - minutes * 60;
  61.     NSString *latValue = [NSString stringWithFormat:@"%d° %d' %1.4f\"", 
  62.                      degrees, minutes, seconds];
  63.  
  64.     degrees = newLocation.coordinate.longitude;
  65.     decimal = fabs(newLocation.coordinate.longitude - degrees);
  66.     minutes = decimal * 60;
  67.     seconds = decimal * 3600 - minutes * 60;
  68.     NSString *longValue = [NSString stringWithFormat:@"%d° %d' %1.4f\"", 
  69.                        degrees, minutes, seconds];
  70.  
  71.     NSLog(@"Lat: %@ Long:%@", latValue, longValue);
  72.  
  73.     // stop updating
  74.     [manager stopUpdatingLocation];
  75. }

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