Querying Core Data with Predicates - iPhone

Question

So I\'m trying to fetch objects from core data. I have list of say 80 objects, and I want to be able to search through them using a UISearchBar. They are displayed in a tab

Answer 1

In typical Core Data application one should delete NSF fetchedResultsController:

[NSFetchedResultsController deleteCacheWithName: [self.fetchedResultsController cacheName]];

Or else you'll get an exception (ideally) or you'll have strange behavior.

Answer 2

use contains[cd] instead of like, and change:

NSPredicate *predicate =[NSPredicate predicateWithFormat:@"All"];

to:

NSPredicate *predicate =[NSPredicate predicateWithFormat:@"1=1"];

Answer 3

Did you try it using MATCH and regular expressions? Just curious to see if LIKE is something that should be avoided on the iPhone or not...

Answer 4

It seems as though iPhone doesn't like the LIKE operator. I replaced it with 'contains[cd]' and it works the way I want it to.