Question

I have 5 cells in my tableview. User can select a row which sets the cells’ accessory to check marked. They can select multiple rows.

I want to make sure one cell is always check marked. How can I do this? All rows are check marked by default.

Here is the code I use in didSelectRow

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
        UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

        if (cell.accessoryType == UITableViewCellAccessoryNone) {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;
        } else {
            cell.accessoryType = UITableViewCellAccessoryNone;
        }
        [self.tableView deselectRowAtIndexPath:iIndexPath animated:YES];
}

Answer 1

Implement tableView:willDeselectRowAtIndexPath:. If there is only one element selected, return nil to indicate that the table may not deselect it.