Problems with Search Display Controller

Question

I am learning to use Search Bars a Search Display Controllers in iOS. I made a simple test project with two views, one view contains a UITableView and a UISearchBar, when you select an row from the table view, the new view shows a label with the name of the row. I'm getting a couple of problems, first when I start to add text in the search bar and the search display appears, the search bar is gone. The filtered results are shown, but when I select a row it does not take me to the next view, this only happens when the table is filtered. Here is the code:

ViewController.h

#import <UIKit/UIKit.h>
#import "DetailViewController.h"

@interface ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource, UISearchDisplayDelegate, UISearchBarDelegate>

@property (strong, nonatomic) IBOutlet UISearchBar *searchBar;
@property (strong, nonatomic) IBOutlet UITableView *tableView;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) NSArray *objects;
@property (nonatomic, strong) NSArray *filteredObjects;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    _objects = [[NSMutableArray alloc] initWithObjects:@"One", @"Two", @"Three", @"Four", @"Five", @"Six", @"Seven", @"Eight", @"Nine", @"Ten", nil];
    _tableView.delegate = self;
    _tableView.dataSource = self;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [_filteredObjects count];

    } else {
        return [_objects count];
    }
}

- (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];
    }

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        cell.textLabel.text = [_filteredObjects objectAtIndex:indexPath.row];
    } else {
        cell.textLabel.text = [_objects objectAtIndex:indexPath.row];
    }

    return cell;
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"ToDetail"]) {
        DetailViewController *detailViewController = [segue destinationViewController];

        if (self.searchDisplayController.active) {
            NSIndexPath *indexPath = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow];
            detailViewController.detailString = [_filteredObjects objectAtIndex:indexPath.row];
        } else {
            NSIndexPath *indexPath = [_tableView indexPathForSelectedRow];
            detailViewController.detailString = [_objects objectAtIndex:indexPath.row];
        }

    }
}

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@", searchText];
    _filteredObjects = [_objects filteredArrayUsingPredicate:resultPredicate];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];

    return YES;
}

Thanks for the help!

Answer 1

when I select a row it does not take me to the next view, this only happens when the table is filtered

Because you have no implementation of tableView:didSelectRowAtIndexPath:.

Remember, there is really no such thing as a "filtered table view". There are two table views: the normal one, and the one that appears because of the search display controller. That is a different table view (basically appearing in front of yours), and you must configure it for whatever you want it to do and however you want it to look.