Adding cells programmatically on a static UITableView - ios

Question

Hi have a complex storyboard uitableview interface with a lot of custom cells.
When a condition is satisfied I need to remove some cells and add others.
In particular, in section 1 I have initially 2 cells and when the condition is satisfied I need to remove this two cells and add some cells (for instance 3 or 4 cells, in the code: self.viaggio.tragitto count).
Here is my code:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
switch (section) {
case 0:
return 2;
break;
case 1:
if(self.trenoCompilato) return [self.viaggio.tragitto count];
else return 2;
case 2:
if(self.trenoCompilato) return 1;
else return 0;
case 3:
return 1;
default:
return 0;
break;
}
}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
if(indexPath.section == 1 && self.trenoCompilato) {
static NSString *cellIdentifier = #"cellTragitto";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIdentifier];
}
Treno *trenoCell = self.viaggio.tragitto[indexPath.row];
cell.textLabel.text = [trenoCell stringaDescrizione];
cell.detailTextLabel.text = [[DateUtils shared] showHHmm:[[DateUtils shared] dateFrom:trenoCell.orarioPartenza]];
return cell;
}
return [super tableView:tableView cellForRowAtIndexPath:indexPath];
}
The condition to display the new cells (they are NOT present in the storyboard) is the boolean self.trenoCompilato
Now. When I do [self.tableview reloadData] when the boolean is TRUE i get:
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 2 beyond bounds [0 .. 1]'
*** First throw call stack:
(
0 CoreFoundation 0x00000001102caf35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010ff63bb7 objc_exception_throw + 45
2 CoreFoundation 0x00000001101c301e -[__NSArrayI objectAtIndex:] + 190
3 UIKit 0x0000000111134912 -[UITableViewDataSource tableView:indentationLevelForRowAtIndexPath:] + 106
4 UIKit 0x0000000110cdf612 __53-[UITableView _configureCellForDisplay:forIndexPath:]_block_invoke + 1704
5 UIKit 0x0000000110c605ce +[UIView(Animation) performWithoutAnimation:] + 65
6 UIKit 0x0000000110cdef5b -[UITableView _configureCellForDisplay:forIndexPath:] + 312
7 UIKit 0x0000000110ce64cc -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 533
8 UIKit 0x0000000110cc5fb1 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2846
9 UIKit 0x0000000110cdbe3c -[UITableView layoutSubviews] + 213
10 UIKit 0x0000000110c68973 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 521
11 QuartzCore 0x0000000110a7ade8 -[CALayer layoutSublayers] + 150
12 QuartzCore 0x0000000110a6fa0e _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
13 QuartzCore 0x0000000110a6f87e _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
14 QuartzCore 0x00000001109dd63e _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 242
15 QuartzCore 0x00000001109de74a _ZN2CA11Transaction6commitEv + 390
16 QuartzCore 0x00000001109dedb5 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 89
17 CoreFoundation 0x00000001101ffdc7 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
18 CoreFoundation 0x00000001101ffd20 __CFRunLoopDoObservers + 368
19 CoreFoundation 0x00000001101f5b53 __CFRunLoopRun + 1123
20 CoreFoundation 0x00000001101f5486 CFRunLoopRunSpecific + 470
21 GraphicsServices 0x0000000113c309f0 GSEventRunModal + 161
22 UIKit 0x0000000110bef420 UIApplicationMain + 1282
23 SeguiTreno 0x000000010f6afa03 main + 115
24 libdyld.dylib 0x00000001141bf145 start + 1
25 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
I have already tried with:
[self.tableView beginUpdates];
[self.tableView deleteRowsAtIndexPaths:deleteIndexPaths withRowAnimation:UITableViewRowAnimationFade];
[self.tableView insertRowsAtIndexPaths:rows withRowAnimation:UITableViewRowAnimationFade];
// inserisco cella con opzione per il cambio soluzione
[self.tableView insertRowsAtIndexPaths:#[[NSIndexPath indexPathForRow:0 inSection:2]] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];
and it still doesn't work.
I tried to add cells in the storyboard and it works! It seems that I can't get more cells than the number is present in the storyboard.
What I'm missing?