CoreDataBooks Example - Start Cells at Index 1? - iphone

Question

Im working with the CoreDataBooks example project from Apple and I want to have a custom cell at indexPath 0 in my tableview and then have my core data fetched results start from index 1.
I have tried some different solutions but can't get it working, if you have any ideas it would due appreciated thanks.
If you want to know what I have tried and failed let me know. What I want to achieve seems simple, just start the fetched results at cell 1 rather than 0.
Edit 2:
All my UITableViewDataSource and configureGuestCell code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0)
{
static NSString *CellIdentifier = #"statsCell";
GuestStatsCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[GuestStatsCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
//Configure the cell.
[self configureStatsCell:cell];
return cell;
}
if (indexPath.row > 0)
{
static NSString *CellIdentifier = #"guestCell";
customGuestCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[customGuestCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell.
[self configureGuestCell:cell atIndexPath:indexPath];
return cell;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
int cellHeight;
if (indexPath.row == 0)
{
cellHeight = 240;
}
else
{
cellHeight = 44;
}
return cellHeight;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[fetchedResultsController sections] count];
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
}
- (void)configureGuestCell:(customGuestCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
//Configure the cell to show the Guests first and last name and other details
GuestInfo *guest = [fetchedResultsController objectAtIndexPath:indexPath];
cell.guestNameLbl.text = [NSString stringWithFormat:#"%# %#", guest.firstName, guest.lastName];
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
// Delete the managed object.
NSManagedObjectContext *context = [fetchedResultsController managedObjectContext];
[context deleteObject:[fetchedResultsController objectAtIndexPath:indexPath]];
NSError *error;
if (![context save:&error])
{
// Update to handle the error appropriately.
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
exit(-1); // Fail
}
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Create and push a detail view controller.
guestListDetailViewController *detailViewController = [[guestListDetailViewController alloc] initWithStyle:UITableViewStyleGrouped];
GuestInfo *selectedGuest = (GuestInfo *)[[self fetchedResultsController] objectAtIndexPath:indexPath];
// Pass the selected book to the new view controller.
detailViewController.guest = selectedGuest;
[self.navigationController pushViewController:detailViewController animated:YES];
}

Answer 1

Fixed code:
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
id <NSFetchedResultsSectionInfo> sectionInfo = [[fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects] +1;
}
- (void)configureGuestCell:(customGuestCell *)cell atIndexPath:(NSIndexPath *)indexPath
{
NSIndexPath *path = [NSIndexPath indexPathForRow:(indexPath.row - 1) inSection:indexPath.section]
//Configure the cell to show the Guests first and last name and other details
GuestInfo *guest = [fetchedResultsController objectAtIndexPath:path];
cell.guestNameLbl.text = [NSString stringWithFormat:#"%# %#", guest.firstName, guest.lastName];
}
Small explanation:
you should return a one row more in numberOfRowsInSection, but, to prevent errors, row number should be decremented before calling [NSFetchedResultsController objectAtIndexPath].

Answer 2

Add 1 to the indexPath.row value....?!

Answer 3

For this to work you also need to edit the -tableView: numberOfRowsInSection: to return (realRows + 1) as well.
Likewise you will want to decrement the row by one whenever you are referencing your NSFetchedResultsController | NSArray which I suspect is in your configureCell:atIndexPath:
Anywhere you want/need to touch the data source you will need to adjust for that row either by incrementing or decrementing.
Response to OP
Don't change the NSIndexPath, there is no need. Adjust the index in your -configureCell: atIndexPath: or anywhere else that touches that index value:
-(void)configureCell:(id)cell atIndexPath:(NSIndexPath*)indexPath
{
NSInteger finalIndex = [indexPath row] - 1;
NSIndexPath *newPath = [NSIndexPath indexPathForRow:finalIndex inSection:[indexPath section]];
id object = [[self myNSFRC] objectAtIndexPath:newPath];
//Continue configuring your cell
}
Obviously if you are using an array then don't bother creating a new NSIndexPath.