locationManager is not updating the Location - ios

Question

i am using this code to get the Location ,using simulator , but its not giving me any output .
also if someone suggest me a solution of this or a better alternative solution.\
-(void)viewDidAppear:(BOOL)animated
{
_locationManager.delegate=self;
[_locationManager startUpdatingLocation];
[self.geoCoder reverseGeocodeLocation: _locationManager.location completionHandler:
^(NSArray *placemarks, NSError *error) {
if (error) {
return;
}
if (placemarks && placemarks.count > 0)
{
CLPlacemark *placemark = placemarks[0];
NSDictionary *addressDictionary =
placemark.addressDictionary;
NSString *address = [addressDictionary
objectForKey:(NSString *)kABPersonAddressStreetKey];
NSString *city = [addressDictionary
objectForKey:(NSString *)kABPersonAddressCityKey];
NSString *state = [addressDictionary
objectForKey:(NSString *)kABPersonAddressStateKey];
NSString *zip = [addressDictionary
objectForKey:(NSString *)kABPersonAddressZIPKey];
NSString *Countrynsme = [addressDictionary
objectForKey:(NSString *)kABPersonAddressCountryKey];
_requestorAddressText.Text = address;
_requestorCityText.text = city;
_requestorPostalText.text = zip;
_CountryrequestorText.text = Countrynsme;
_requestorStateText.text = state;
}
}];
[_locationManager stopUpdatingLocation];
}

Answer 1

CLLocationManager is an asynchronous API. You need to wait for the result of CLLocationManager before you geocode the location.
Start listening for location manager updates using the CLLocationManagerDelegate
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
NSTimeInterval interval = [newLocation.timestamp timeIntervalSinceNow];
if (interval < 0) {
interval = -interval;
}
// Reject stale location updates.
if (interval < 30.0) {
// Start geocoding
[geoCoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
// Use geocoded results
...
}];
}
// If you're done with getting updates then do [manager stopUpdatingLocation]
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
// Handle error. Perhaps [manager stopUpdatingLocation]
}
Then viewDidAppear just bootstrap's the location lookup:
- (void)viewDidAppear {
// PS: You're missing a call to [super viewDidAppear]
[super viewDidAppear];
// Start lookup for location
_locationManager.delegate=self;
[_locationManager startUpdatingLocation];
}
PS: In dealloc don't forget to stop updating location, cancel geocode and nil the delegates for locationManager.