Question

In my app I use the following code to set a value of an array to zero:

 [[records objectAtIndex:prizenotify] setValue:nil forKey:@"marbles"];
    NSError *error;
    [_managedObjectContext save:&error]; //Save 

But, It crashes my code. Am I coding this correctly? Marbles is an NSNumber.

Thanks!

Answer 1

[[records objectAtIndex:prizenotify] setValue:[NSNumber numberWithInteger:0] forKey:@"marbles"];

Or in modern Objective-C:

[records[prizenotify] setValue:@0 forKey:@"marbles"];