¿Por qué no mi UISearchDisplayController disparar el método didSelectRowAtIndexPath?

Question

Estoy teniendo un problema extraño cuando se busca un UITableView utilizando un UISearchDisplayController. El UITableViewController es una subclase de otra UITableViewController con un método de trabajo didSelectRowAtIndexPath. Sin tener que buscar y el controlador maneja selecciones bien, el envío de la superclase una llamada didSelectRowAtIndexPath, pero si selecciono una célula cuando se busca la superclase recibe nada más que la célula se pone de relieve. A continuación se muestra el código de mi subclase.

@implementation AdvancedViewController


@synthesize searchDisplayController, dict, filteredList;


- (void)viewDidLoad {
    [super viewDidLoad];

    // Programmatically set up search bar
    UISearchBar *mySearchBar = [[UISearchBar alloc] init];
    mySearchBar.delegate = self;
    [mySearchBar setAutocapitalizationType:UITextAutocapitalizationTypeNone];
    [mySearchBar sizeToFit];
    self.tableView.tableHeaderView = mySearchBar;

    // Programmatically set up search display controller
    searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:mySearchBar contentsController:self];
    [self setSearchDisplayController:searchDisplayController];
    [searchDisplayController setDelegate:self];
    [searchDisplayController setSearchResultsDataSource:self];

    // Parse data from server
    NSData * jsonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
    NSArray * items = [[NSArray alloc] initWithArray:[[CJSONDeserializer deserializer] deserializeAsArray:jsonData error:nil]];

    // Init variables
    dict = [[NSMutableDictionary alloc] init];
    listIndex = [[NSMutableArray alloc] init];
    fullList = [[NSMutableArray alloc] init];
    filteredList = [[NSMutableArray alloc] init];

    // Get each item and format it for the UI
    for(NSMutableArray * item in items) {
        // Get the first letter
        NSString * firstKey = [[[item objectAtIndex:0] substringWithRange:NSMakeRange(0,1)] uppercaseString];

        // Put symbols and numbers in the same section
        if ([[firstKey stringByTrimmingCharactersInSet:[[NSCharacterSet letterCharacterSet] invertedSet]] isEqualToString:@""]) firstKey = @"#";

        // If there isn't a section with this key
        if (![listIndex containsObject:firstKey]) {
            // Add the key to the index for faster access (because it's already sorted)
            [listIndex addObject:firstKey];
            // Add the key to the unordered dictionary
            [dict setObject:[NSMutableArray array] forKey:firstKey];
        }
        // Add the object to the dictionary
        [[dict objectForKey:firstKey] addObject:[[NSMutableDictionary alloc] initWithObjects:item forKeys:[NSArray arrayWithObjects:@"name", @"url", nil]]];
        // Add the object to the list for simple searching
        [fullList addObject:[[NSMutableDictionary alloc] initWithObjects:item forKeys:[NSArray arrayWithObjects:@"name", @"url", nil]]];
    }

    filteredList = [NSMutableArray arrayWithCapacity:[fullList count]];
}


#pragma mark -
#pragma mark Table view data source

// Custom method for object oriented data access
- (NSString *)tableView:(UITableView *)tableView dataForRowAtIndexPath:(NSIndexPath *)indexPath withKey:(NSString *)key {
    return (NSString *)((tableView == self.searchDisplayController.searchResultsTableView) ? 
                        [[filteredList objectAtIndex:indexPath.row] objectForKey:key] :
                        [[[dict objectForKey:[listIndex objectAtIndex:indexPath.section]] objectAtIndex:indexPath.row] valueForKey:key]);
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
    return (tableView == self.searchDisplayController.searchResultsTableView) ? 1 : (([listIndex count] > 0) ? [[dict allKeys] count] : 1);
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return (tableView == self.searchDisplayController.searchResultsTableView) ? [filteredList count] : [[dict objectForKey:[listIndex objectAtIndex:section]] count];
}

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView { 
    return (tableView == self.searchDisplayController.searchResultsTableView) ? [[NSArray alloc] initWithObjects:nil] : listIndex;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { 
    return (tableView == self.searchDisplayController.searchResultsTableView) ? @"" : [listIndex objectAtIndex:section];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *kCellID = @"cellID";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kCellID];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kCellID] autorelease];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    NSString * name = nil;

    // TODO: Make dataForRowAtIndexPath work here
    if (tableView == self.searchDisplayController.searchResultsTableView) {
        // NOTE: dataForRowAtIndexPath causes this to crash for some unknown reason. Maybe it is called before viewDidLoad and has no data?
        name = [[filteredList objectAtIndex:indexPath.row] objectForKey:@"name"];
    } else {
        // This always works
        name = [self tableView:[self tableView] dataForRowAtIndexPath:indexPath withKey:@"name"];
    }

    cell.textLabel.text = name;

    return cell;
}


#pragma mark Search Methods


- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {
    // Clear the filtered array
    [self.filteredList removeAllObjects];

    // Filter the array
    for (NSDictionary *item in fullList) {
        // Compare the item's name to the search text
        NSComparisonResult result = [[item objectForKey:@"name"] compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchText length])];
        if (result == NSOrderedSame) {
            // Add to the filtered array if it matches
            [self.filteredList addObject:item];
        }
    }
}


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

    // Return YES to cause the search result table view to be reloaded.
    return YES;
}


- (void)viewDidUnload { filteredList = nil; }


@end

Answer 1

Mi consejo es mantener una propiedad UITableView en su controlador de vista llamado currentTableView. Cuando los cambios de campo de texto de búsqueda, que establecen el valor de esta propiedad:

- (BOOL) searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString searchScope:(NSInteger)searchOption {
    ...
    if ([[searchString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length])
        self.currentTableView = searchDisplayController.searchResultsTableView;
    else
        self.currentTableView = tableView;
    ...
}

Todos los otros métodos pueden probar si currentTableView es una búsqueda de vista de resultados de tabla o una vista "normal" mesa. El controlador resultados inverosímiles puede trabajar con currentTableView independientemente del contexto, es en. Etc.

Answer 2

El mismo problema que me ha pasado, lo hice mismo error contigo. Se olvidó de añadir searchResultsDelegate. Mi problema se resuelve mediante el cambio de código, como a continuación:

Añadir

[searchDisplayController setSearchResultsDelegate:self];

abajo

[searchDisplayController setDelegate:self];
[searchDisplayController setSearchResultsDataSource:self];