cell reusing can be tricky but you have to keep 2 things in mind:
- Use one identifier for one type of cell – Using multiple identifiers is really only needed when you use different UITableViewCell-subclasses in one table view and you have to rely on their different behaviour for different cells
- The cell you reuse can be in any state, which means you have to configure every aspect of the cell again – especially checkmars / images / text / accessoryViews / accessoryTypes and more
What you need to do is to create a storage for your checkmark states – a simple array containing bools (or NSArray containing boolean NSNumber objects respectively) should do it. Then when you have to create/reuse a cell use following logic:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *reuseIdentifier = @"MyCellType";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if(cell == nil) {
/* create cell here */
}
// Configure cell now
cell.textLabel.text = @"Cell text"; // load from datasource
if([[stateArray objectAtIndex:indexPath.row] boolValue]) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
} else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
then you will have to react on taps:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[stateArray replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithBool:![[stateArray objectAtIndex:indexPath.row] boolValue]]];
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
Just remember to use NSMutableArray
for your data store 😉