Failing UISearchDisplayController

gistfile1.m

#import "UserSearchViewController.h"

@interface UserSearchViewController () <UISearchBarDelegate, UISearchDisplayDelegate>

@end

@implementation UserSearchViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.searchDisplayController.displaysSearchBarInNavigationBar = YES;
}

// create 10 rows that display the row number.
// no data source atm for the minimum failing test
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 10;
}

// just display the row number
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"Cell";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    
    cell.textLabel.text = [NSString stringWithFormat:@"%ld", (long)indexPath.row];
    
    return cell;
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
    [self.navigationController dismissViewControllerAnimated:YES completion:nil];
}

@end