Zombie section headers in indexed list - ios

Question

I made indexed list according to this apple tutorial, but I have problem with deleting items. When I delete last item in section at the bottom, the section header remain there. This happens only with last section.
Here is my code for deleting item:
- (void)tableView:(UITableView *)tableView commitEditingStyle: (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete)
{
[[self.littleWords objectAtIndex:indexPath.section]removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
littleWords is array of sections same as states in apple tutorial.
code for making cells:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:#"MyBasicCell"];
Word * myWord = [[self.littleWords objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];
cell.textLabel.text = myWord.name;
cell.detailTextLabel.text = myWord.translation;
return cell;
}
rest of tableView functions:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [self.littleWords count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[self.littleWords objectAtIndex:section] count];
}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
return [[UILocalizedIndexedCollation currentCollation] sectionIndexTitles];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
if ([[self.littleWords objectAtIndex:section] count] > 0) {
NSString *str = [[[UILocalizedIndexedCollation currentCollation] sectionTitles] objectAtIndex:section];
NSLog(#"returning section header: %#", str);
return str;
}
return nil;
}
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
{
return [[UILocalizedIndexedCollation currentCollation] sectionForSectionIndexTitleAtIndex:index];
}

Answer 1

The problem is in the method numberOfSectionsInTableView:. The number should change when you delete all of the items in a given section. Here is an example of what you can do:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
NSInteger sections = 0;
for (NSArray *sectionArray in littleWords) {
if (sectionArray.count > 0) {
sections++;
}
}
return sections;
}
Edit: After deleting the row, you may need to call [tableView reloadData] or a similar methid to update the sections.