Question

I essentially started off with this CoreLocation iOS tutorial to get my head around how to implement CoreLocation into my app. (http://www.techotopia.com/index.php/An_Example_iOS_5_iPhone_Location_Application)

But what I have encountered when trying to incorporate this tutorial into my app is that it now just keeps on looping over and over, which is just baffling me. Can anyone please help?

GPSViewController.h

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

@interface GPSViewController : UIViewController
@property (strong, nonatomic) CLLocationManager *locationManager;
@property (strong, nonatomic) CLLocation *startLocation;
@end

GPSViewController.m

#import "GPSViewController.h"

#import "DataClass.h"

@interface GPSViewController ()

@end

@implementation GPSViewController
@synthesize locationManager, startLocation;

DataClass *obj;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //initialization og global varable.
    DataClass *obj=[DataClass getInstance];

    //GPS Initialise
    self.locationManager = [[CLLocationManager alloc] init];
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    locationManager.delegate = self;
    [locationManager startUpdatingLocation];
    startLocation = nil;

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark -
#pragma mark CLLocationManagerDelegate

-(void)locationManager:(CLLocationManager *)manager
   didUpdateToLocation:(CLLocation *)newLocation
          fromLocation:(CLLocation *)oldLocation
{
    NSString *currentLatitude = [[NSString alloc]
                                 initWithFormat:@"%g",
                                 newLocation.coordinate.latitude];
    //latitude.text = currentLatitude;
    obj.Latatude = currentLatitude;

    NSString *currentLongitude = [[NSString alloc]
                                  initWithFormat:@"%g",
                                  newLocation.coordinate.longitude];
    //longitude.text = currentLongitude;
    obj.Longitude = currentLongitude;

    NSLog(@"latitude %+.6f, longitude %+.6f\n",
          newLocation.coordinate.latitude,
          newLocation.coordinate.longitude);

    if(obj.Latatude != NULL && obj.Longitude != NULL){
        [self performSegueWithIdentifier:@"GPSSuccess" sender:self];
    }
}

-(void)locationManager:(CLLocationManager *)manager
      didFailWithError:(NSError *)error
{
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
    self.startLocation = nil;
    self.locationManager = nil;
}


@end

Answer 1

You should call [locationManager stopUpdatingLocation]; in order to stop it from getting the user’s location over and over.