iOS 5, waiting for location - ios

Question

I have this method for locate the user and then change some numbers according to the Country he's in:
- (void) localizing {
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
[locationManager startUpdatingLocation];
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
DbOperations *dbOp = [[DbOperations alloc] init];
geoCoder = [[CLGeocoder alloc] init];
[self.geoCoder reverseGeocodeLocation: locationManager.location completionHandler:
^(NSArray *placemarks, NSError *error) {
//Get nearby address
CLPlacemark *placemark = [placemarks objectAtIndex:0];
//String to hold address
countryCode = [placemark.addressDictionary valueForKey:#"CountryCode"];
country = [placemark.addressDictionary valueForKey:#"Country"];
NSString *s2 = NSLocalizedString(#"You're currently in %#", nil);
lblLocation.text = [NSString stringWithFormat:s2, self.country];
[dbOp UsefulNumbers:self.countryCode];
NSUserDefaults *loc = [NSUserDefaults standardUserDefaults];
[loc setObject:country forKey:#"Country"];
[loc setObject:countryCode forKey:#"CountryCode"];
[loc synchronize];
}];
[locationManager stopUpdatingLocation];
NSUserDefaults *loc = [NSUserDefaults standardUserDefaults];
if ([loc objectForKey:#"Country"] == NULL) {
btnUno.enabled = NO;
btnDue.enabled = NO;
btnTre.enabled = NO;
lblLocation.text = NSLocalizedString(#"Unable to locate you", nil);
}
}
The method get called by 'viewDidLoad' method but the very first time I run the app I can't get located.
If I open up Maps, let it get the fix and then open my app, everything goes fine.
I thought that maybe I don't give enough time to the app to get a GPS fix or maybe I'm just doing it wrong.
Any suggestions?
EDIT: modified the code, not working yet.
- (id) init {
self = [super init];
if (self != nil) {
self.locationManager = [[CLLocationManager alloc] init];
self.locationManager.delegate = self;
}
return self;
}
- (void) viewDidLoad {
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;
[locationManager startUpdatingLocation];
[super viewDidLoad];
}
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
DbOperations *dbOp = [[DbOperations alloc] init];
geoCoder = [[CLGeocoder alloc] init];
[self.geoCoder reverseGeocodeLocation: locationManager.location completionHandler:
^(NSArray *placemarks, NSError *error) {
//Get nearby address
CLPlacemark *placemark = [placemarks objectAtIndex:0];
//String to hold address
countryCode = [placemark.addressDictionary valueForKey:#"CountryCode"];
country = [placemark.addressDictionary valueForKey:#"Country"];
NSString *s2 = NSLocalizedString(#"You're currently in %#", nil);
lblLocation.text = [NSString stringWithFormat:s2, self.country];
[dbOp UsefulNumbers:self.countryCode];
NSUserDefaults *loc = [NSUserDefaults standardUserDefaults];
[loc setObject:country forKey:#"Country"];
[loc setObject:countryCode forKey:#"CountryCode"];
[loc synchronize];
NSLog(#"Country: %#", country);
}];
NSUserDefaults *loc = [NSUserDefaults standardUserDefaults];
if ([loc objectForKey:#"Country"] == NULL) {
btnUno.enabled = NO;
btnDue.enabled = NO;
btnTre.enabled = NO;
lblLocation.text = NSLocalizedString(#"unable to locate", nil);
}
}
Method locationManager:didUpdateToLocation:fromLocation does not get called.

Answer 1

You should put your code for reverse geocoding in the delegate method for CLLocationManager:
– locationManager:didUpdateToLocation:fromLocation:
Your current setup is trying to reverse geocode a location before an update has been dispatched from the location manager.
Consider setting up your CLLocationManager in your init method and then waiting for the delegate to be called before attempting to reverse geocode anything.