Pass data from a selected cell in UITableView

I have a tableview where each cell is populated with dynamic data from an array. From here, when the user selects a row, I want to push the particular data from that cell to a ViewController so that it can eventually be used for a POST request. Now I know this code on my tableviewcontroller will just display the data

- (void)tableView:(UITableView *) tableView didSelectRowAtIndexPath:(NSIndexPath *__strong)indexPath {
    DetailGameController *detail = [self.storyboard instantiateViewControllerWithIdentifier:@"Detail"];
    [self.navigationController pushViewController:detail animated:YES];
    NSUInteger row = [indexPath row];
    detail.rowNum.text = [photoTitles objectAtIndex:row];

}

but how do I actually use the data?

Here is a snippet of what I have (the actual code has multiple NSMutableArrays but I only included one):

     - (void)viewDidLoad
    {

        [super viewDidLoad];
        photoTitles = [[NSMutableArray alloc] init];
 NSURL *url = [NSURL URLWithString:@"http://localhost/test.php"];
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    [request setPostValue:dataCenter.data forKey:@"name"];
    [request setDelegate:self];
    [request startAsynchronous];

}
- (void)requestFinished:(ASIFormDataRequest *)request
{

    NSString *responseString = [request responseString];

    NSDictionary *dictionary = [responseString JSONValue]; 
    NSArray *photos = [[dictionary objectForKey:@"photos"] objectForKey:@"photo"];

    for (NSDictionary *photo in photo) {
        NSString *photo = [photo objectForKey:@"photo"];
        [photoTitles addObject:photo];
    }    
}

-(NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
    return [photoTitles count];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath   {


    static NSUInteger const kPhotoTitleTag = 2;
    UILabel *photoTitleLabel = nil;

 static NSString *SimpleTableIdentifier = @"SimpleTableIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:
                             SimpleTableIdentifier];
    if(cell == nil){


        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier: SimpleTableIdentifier];

        photoTitleLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 25, 170, 14)];
        [cell.contentView addSubview:photoTitleLabel];
}else {
        photoTitleLabel = (UILabel *)[cell.contentView viewWithTag:kPhotoTitleTag];
}
NSUInteger row = [indexPath row];

    photoTitleLabel.text = [photoTitles objectAtIndex:row];
    return cell;

Any help in putting me in the right direction would be awesome. Let me know if anything isn't clear.

Why pass the index of the row?
Pass the information the other controller need to use.

DetailGameController *detail = [self.storyboard instantiateViewControllerWithIdentifier:@"Detail"];
NSUInteger row = [indexPath row];
detail.someProperty = [photoTitles objectAtIndex:row];
detail.someOtherProperty = // other interesting elements ;