CLLocationCoordinate2D converting return null - iphone

Question

i m trying to convert longituude and latitude to NSNumbers to save them in core data.
following my code:
getting coordinate
CLLocationCoordinate2D coordinate = [[mapView.annotations objectAtIndex:0] coordinate];
NSLog(#"Long2: %f", coordinate.longitude);
NSLog(#"Lat2: %f", coordinate.latitude);
Output
2013-04-28 20:22:05.918 [1892:16a03] Long2: -122.406417
2013-04-28 20:22:05.918 [1892:16a03] Lat2: 37.785834
Setting values:
[members.eventDTO setLatLong:coordinate];
- (void)setLatLong: (CLLocationCoordinate2D)coordinate{
self.locLatitude = [NSNumber numberWithDouble:coordinate.latitude];
self.locLongitude = [NSNumber numberWithDouble:coordinate.longitude];
}
then i tried that for output:
NSLog(#"Long2: %f", [members.eventDTO.locLongitude doubleValue]);
NSLog(#"Lat2: %#", members.eventDTO.locLatitude);
2013-04-28 20:22:05.918 [1892:16a03] Long2: 0.000000
2013-04-28 20:22:05.919 [1892:16a03] Lat2: (null)
any clue its returning that?

Answer 1

According to what you described in your question, it seems that the object is still nil after you set it in your setLatLong: method. My hints that I can suggest here are:
try to log the NSNumber inside your setLatLong: method to check if they are being created correctly;
try to log self.locLatitude and self.locLongitude after you set them, to see if they are assigned correctly.
are the NSManagedObject being created correctly?
are you calling save to your NSManagedObjectContext?
Please post more info so we can hunt the problem together ;)