UISearchDisplayController Not Displaying Results in searchResultsTableView
===

I have a `UISearchDisplayController` properly connected to the header of a custom `UITableView` in IB. However, when I search for anything the `searchResultsTableView` only displays "No Results", and I cannot seem to find where the code is incorrect.

**`searchResults` Property**

    - (NSMutableArray *)searchResults {
        if (!_searchResults) {
            _searchResults = [[NSMutableArray alloc] initWithCapacity:self.listingPreviews.count];
        }
    
        return _searchResults;
    }

**Table View Data Source Methods**

    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
        // Return the number of rows in the section.
        NSInteger numberOfRows = 0;
    
        if (tableView == self.tableView) {
            numberOfRows = self.listingPreviews.count;
        } else {
            numberOfRows = self.searchResults.count;
        }
    
        return numberOfRows;
    }

    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        static NSString *CellIdentifier = @"Uloop Listing";
        TextbooksListingPreviewTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    
        if (!cell) {
            cell = [[TextbooksListingPreviewTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        }
    
        // Configure the cell.
        if (tableView == self.tableView) {
            cell.listingPreview = [self.listingPreviews objectAtIndex:indexPath.row];
        } else {
            NSLog([[self.searchResults objectAtIndex:indexPath.row] title]);
            cell.listingPreview = [self.searchResults objectAtIndex:indexPath.row];
        }
    
        return cell;
    }

**Search Bar Delegate Method**

    - (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
        NSInteger searchTextLength = searchText.length;
    
        for (TextbooksListingPreview *listingPreview in self.listingPreviews) {
            if ((listingPreview.title.length >= searchTextLength) && ([listingPreview.title rangeOfString:searchText].location != NSNotFound)) {
                [self.searchResults addObject:listingPreview];
            }
        }
    }