Question

I create table programmatically with different sections and rows, i create check box inside table with pictures as a box

I want to put limitation for this check box

would you please help me

Edit :

my question is how can I choosing just one check box- limitation of choice

and also how can I unselect a box and remove the checkmark

here is code for check box row

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
    NSString *key = [[self sectionKeys] objectAtIndex:[indexPath section]];
    NSArray *contents = [[self sectionContents] objectForKey:key];
    NSString *contentForThisRow = [contents objectAtIndex:[indexPath row]];

    if (indexPath.section != 2) {
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
        cell.textLabel.text =contentForThisRow;
        return cell;
    }
    else {
        CheckBoxAbsenceTableViewCell *cell = (CheckBoxAbsenceTableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"CheckBoxAbsenceTableViewCell"];

        cell.imageView.image=[UIImage imageNamed:@"emptycheck-box.png"];
        cell.checkBox.image = image;
        if(indexPath.row == 0){
            cell.absenceCode.text =@"Red";
        }
        else if (indexPath.row == 1){
            cell.absenceCode.text =@"Green";

        }else if(indexPath.row == 2){
            cell.absenceCode.text =@"Blue";
        }
        return cell;
    }
}  

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
  {
      CheckBoxAbsenceTableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
      selectedCell.checkBox.image =[UIImage imageNamed:@"checkmark.png"];
  }

Thanks in advance!

Answer 1

The easy solution is to add a UIInteger _selectedIndex instance var to your view controller.
In viewDidLoad set it to -1 (non of the rows is selected)
Then when user select a cell, save the selected index and reload the tableView:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
  {  
      _selectedIndex = indexPath.row;
      [self.tableView reloadData];
  }  

Change the cellForRowAtIndexPath method so it will select only the selected cell:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{
    NSString *key = [[self sectionKeys] objectAtIndex:[indexPath section]];
    NSArray *contents = [[self sectionContents] objectForKey:key];
    NSString *contentForThisRow = [contents objectAtIndex:[indexPath row]];

    if (indexPath.section != 2) {
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
        cell.textLabel.text =contentForThisRow;
        return cell;
    }
    else {
        CheckBoxAbsenceTableViewCell *cell = (CheckBoxAbsenceTableViewCell*)[tableView dequeueReusableCellWithIdentifier:@"CheckBoxAbsenceTableViewCell"];

        if (indexPath.row == _selectedIndex) {
            cell.checkBox.image =[UIImage imageNamed:@"checkmark.png"];
        }
        else {
            cell.checkBox.image = [UIImage imageNamed:@"emptycheck-box.png"];;
        }


        if(indexPath.row == 0){
            cell.absenceCode.text =@"Red";
        }
        else if (indexPath.row == 1){
            cell.absenceCode.text =@"Green";

        }else if(indexPath.row == 2){
            cell.absenceCode.text =@"Blue";
        }
        return cell;
    }
}