search array in Russian - ios

Question

I made a list in tableviewcontroller, then add search bar and search display. But due to the fact that I have an array in Russian language search is not working. If I add the numbers in the array and start search it's work. But if on the Russian letters, no. How to fix it?
My code
- (instancetype)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self) {
_items
= [NSArray arrayWithObjects:
#"А",
#"Ак",
#"Ба",
#"Бо",
#"22",
#"23",
nil];
}
return self;
}
#pragma mark - UISearchDisplayDelegate
// register a cell reuse identifier for the search results table view
-(void)searchDisplayController:(UISearchDisplayController *)controller
didLoadSearchResultsTableView:(UITableView *)tableView {
[tableView registerClass:[UITableViewCell class]
forCellReuseIdentifier:#"SearchResultsTableViewUITableViewCell"];
}
// perform the search
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString {
NSPredicate *predicate
= [NSPredicate predicateWithFormat:#"self beginswith %#", searchString];
NSArray *searchResults
= [[self items] filteredArrayUsingPredicate:predicate];
[self setSearchResults:searchResults];
return YES;
}
#pragma mark - UITableViewDataSource
// check if displaying search results
-(NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
if ([[self searchDisplayController] isActive]) {
return [[self searchResults] count];
} else {
return [[self items] count];
}
}
// check if displaying search results
-(UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if ([[self searchDisplayController] isActive]) {
UITableViewCell *cell
= [tableView dequeueReusableCellWithIdentifier:#"SearchResultsTableViewUITableViewCell"
forIndexPath:indexPath];
id item = [[self searchResults] objectAtIndex:[indexPath row]];
[[cell textLabel] setText:item];
return cell;
} else {
UITableViewCell *cell
= [tableView dequeueReusableCellWithIdentifier:#"UITableViewCell"
forIndexPath:indexPath];
id item = [[self items] objectAtIndex:[indexPath row]];
[[cell textLabel] setText:item];
return cell;
}
}
#pragma mark - UITableViewDelegate
// manually perform detail segue after selecting a search result
-(void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if ([[self searchDisplayController] isActive]) {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[self performSegueWithIdentifier:#"detailSegue" sender:cell];
}
}
#pragma mark - UIViewController
/* prepare for detail scene segue
called after cell selection in the master and
search results table views */
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
UITableViewCell *cell = (UITableViewCell *)sender;
id item = nil;
if ([[self searchDisplayController] isActive]) {
NSIndexPath *indexPath
= [[[self searchDisplayController] searchResultsTableView] indexPathForCell:cell];
item = [[self searchResults] objectAtIndex:[indexPath row]];
} else {
NSIndexPath *indexPath
= [[self tableView] indexPathForCell:cell];
item = [[self items] objectAtIndex:[indexPath row]];
}
UIViewController *detail
= (UIViewController *)[segue destinationViewController];
[[detail navigationItem] setTitle:item];
}
#end

Answer 1

NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF contains [cd] %#", self.searchBar.text];
self.searchResults = [[_actualItems filteredArrayUsingPredicate:predicate] mutableCopy];