iOS 5 NSNumber Bug

Question

I will become crazy with this bug ! I have this piece of code which works well on iOS 4.3

newRegistered.ticket_id = [NSNumber numberWithInt:
[curRegistered objectForKey:@"ticket_id"] intValue]];

If I do :

NSLog(@"ID before : %d, ID after : %d",
[curRegistered objectForKey:@"ticket_id"] intValue], [newRegistered.ticket_id intValue]);

I Have on iOS 4.3 :

ID before : 35459, ID after : 35459

And on iOS 5.0 :

ID before : 35459, ID after : -30077

Please help ! Thank you for advance.

##EDIT :## I have investigated a bit more the problem. It seems the problem comes from assigning a NSNumber in CoreData. I should have specified that the piece of code above is used with CoreData (newRegistered is a NSManagedObject, and curRegistered is a NSDictionary containing JSON Data (only strings, never int or long...)).

Here is the specific problem :

long long test = 789654;

Registereds *a = [NSEntityDescription insertNewObjectForEntityForName:@"Registereds" inManagedObjectContext:self.managedObjectContext];
a.ticket_id = [NSNumber numberWithLongLong:test];
NSLog(@"%lld -> %@", test, a.ticket_id); // Displays 789654 -> 3222 on iOS 5 and 789654 -> 789654 on iOS 4.3

NSNumber *ticket_id = [NSNumber numberWithLongLong:test];
NSLog(@"%lld -> %@", test, ticket_id); // Displays 789654 -> 789654

So it seems the problem comes from the Registereds object (which is a NSManagedObject, like the newRegistered in the previous example).

Do you have any idea why this happens? I have never seen something like that in more than 2 years of coding, this bug really makes me think I don't know how to code...

Answer 1

A hint: 789654 truncated to 16 bits is 3222.

I have tried to replicate your problem with iOS 5. The only way I can get NSLog(@"%lld -> %@", test, a.ticket_id) to display '789654 -> 3222' is if I set the ticket_id attribute type to Integer 16 . If I set it to Integer 32 or Integer 64 then the expected value is displayed.

Check the attribute type for ticket_id in the data model editor. Because you are using long long I assume it should be set to Integer 64 . From what you are showing I would suspect it is set to Integer 16 . If not, then the value is getting truncated to 16 bits somewhere else.