Question

In a core data fetch request I want to sort the result case insensitive.
So I coded:

NSSortDescriptor *sortDescriptor = 
     [[NSSortDescriptor alloc] initWithKey:@"name" 
                                 ascending:YES 
                                comparator:^(id s1, id s2) 
            {

                return [s1 localizedCaseInsensitiveCompare:s2];
            }];

but unfortunately the result is still:
B U a c y z.

But the Block seems to be ok, because if I sort the result with that code:

NSMutableArray* names = ......
[names sortUsingComparator:^(id s1, id s2) 
     {

         return [s1 localizedCaseInsensitiveCompare:s2];
     }]; 

than the result is:
a B c U y z.

Where is my fault?

Answer 1

I’ve found a solution not with Block – but with selector:

NSSortDescriptor *sortDescriptor =
       [[NSSortDescriptor alloc] initWithKey:@"question" 
                                    ascending:YES 
                                    selector:@selector(localizedCaseInsensitiveCompare:)];

if “name” is a string-attribute of a core data Entity it works well.