Question

I have a class, with some objects (Title, price, modifier), And I have an NSArray of objects of this class.

I load this NSArray into UITableView. How can I use searchDisplayController?
I can’t understand.. array have only addresses (to objects in my class) and how i can sort it by predicate?

Answer 1

I can explain with an example

Let consider my code is like below

Without NSPredicate

NSMutableArray *oldSkoolFiltered = [[NSMutableArray alloc] init];
for (Book *book in bookshelf) {
    if ([book.publisher isEqualToString:@"Apress"]) {
        [oldSkoolFiltered addObject:book];
    }
}

Applied NSPredicate

NSPredicate *predicate = 
  [NSPredicate predicateWithFormat:@"publisher == %@", @"Apress" ];
NSArray *filtered  = [bookshelf filteredArrayUsingPredicate:predicate];