Custom TableViewCell not updating - ios

Question

I want to set the checkmark in front of the cell. When I click on the checkmark icon the correct function is called and the datasource is changed.
I call [table reloadData] and after that even cellForRowAtIndexPath is also called but it is always dequeing the old table cell and not reloading it with the new data source..
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = #"CheckboxCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
NSLog(#"cellForRowAtIndexPath row: %d", indexPath.row);
// use CustomCell layout
CheckboxCell *checkboxCell;
if(cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"CheckboxCell" owner:self options:nil];
for (id currentObject in topLevelObjects){
if ([currentObject isKindOfClass:[UITableViewCell class]]){
checkboxCell = (CheckboxCell *)currentObject;
break;
}
}
} else {
checkboxCell = (CheckboxCell *)cell; // return cell;
}
Observation *observation = [observations objectAtIndex:indexPath.row];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateFormat = #"dd.MM.yyyy";
[dateFormatter setTimeZone:[NSTimeZone systemTimeZone]];
NSString *nowString = [dateFormatter stringFromDate:observation.date];
[dateFormatter release];
NSString *amountString = [[NSString alloc] initWithFormat:#"%d", observation.amount];
checkboxCell.name.text = [observation.organism getNameDe];
checkboxCell.date.text = nowString;
checkboxCell.amount.text = amountString;
checkboxCell.latName.text = [observation.organism getLatName];
// Define the action on the button and the current row index as tag
[checkboxCell.checkbox addTarget:self action:#selector(checkboxEvent:) forControlEvents:UIControlEventTouchUpInside];
[checkboxCell.checkbox setTag:observation.observationId];
// Define the action on the button and the current row index as tag
[checkboxCell.remove addTarget:self action:#selector(removeEvent:) forControlEvents:UIControlEventTouchUpInside];
[checkboxCell.remove setTag:observation.observationId];
// Set checkbox icon
if(observation.submitToServer) {
NSLog(#"CHECKED");
checkboxCell.checkbox.imageView.image = [UIImage imageNamed:#"check_icon.png"];
} else {
NSLog(#"UNCHECKED");
checkboxCell.checkbox.imageView.image = [UIImage imageNamed:#"checkbox.gif"];
}
[amountString release];
[observation release];
return checkboxCell;
// Set checkbox icon
if(observation.submitToServer) {
NSLog(#"CHECKED");
checkboxCell.checkbox.imageView.image = [UIImage imageNamed:#"check_icon.png"];
} else {
NSLog(#"UNCHECKED");
checkboxCell.checkbox.imageView.image = [UIImage imageNamed:#"checkbox.gif"];
}
[amountString release];
[observation release];
return checkboxCell;
}
I think I'm doing something in the cellForRowAtIndexPath wrong.. Can anybody help me?
Edit:
The first problem could be fixed (Thanks to Maggie). Now the checkmark is changing the first time correctly. But somehow if I change it on another cell its crashing on the following line:
- (void) checkboxEvent:(UIButton *)sender
{
UIButton *button = (UIButton *)sender;
NSNumber *number = [NSNumber numberWithInt:button.tag];
for(Observation *ob in observations) {
if(ob.observationId == [number intValue]) { // <---- IT'S CRASHING HERE
ob.submitToServer = !ob.submitToServer;
NSLog(#"New value: %#", (ob.submitToServer) ? #"YES" : #"NO");
}
}
[table reloadData];
}
But the observation object isn't nil. Any ideas?

Answer 1

Replace
else {
return cell;
}
part with
else {
checkboxCell = (CheckboxCell *)cell;
}
and fill your checkboxCell with apropriate data.