IOS how to get live latitude and longitude - ios

Question

I want the current latitude and longitude of my device. I can print latitude and longitude when my program locate the device for the first time but I can't refresh it.
-(void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
int lastindex = [locations count]-1;
CLLocation * currentLocation = [locations objectAtIndex:lastindex];
float latitude =currentLocation.coordinate.latitude;
float longitude =currentLocation.coordinate.longitude;
NSLog(#"LAT:%f LONG:%f",latitude,longitude);
[self latitudeLabel].text = [[NSString alloc]initWithFormat:#"latitude : %#",[[NSNumber numberWithFloat:latitude] stringValue]];
[self longitudeLabel].text = [[NSString alloc]initWithFormat:#"longitude : %#",[[NSNumber numberWithFloat:longitude] stringValue]];
}
This is what I tried but latitude/longitude are never updated. I tried it with the function didUpdateHeading but that didn't work either.
How can i do this. Any one can help me to solve this issue.
Thanks you

Answer 1

This method is triggered by startUpdatingLocation which I assume you're using since it did get called at least once. The method gets called each time the location data changes. Is your location actually changing enough to trigger it? Also, check the distanceFilter property on your CLLocationManager and make sure it is low enough.

Answer 2

Make sure you add the following to your header:
#interface YourLocationObject : SomeObject <CLLocationManagerDelegate>
.. and when you create your CLLocationManager object, you set yourself as the delegate:
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
//... other customization here ...//
[locationManager startUpdatingLocations];