How to track the index of all seleted cells in UITableView - iphone

Question

I have a UITableView with about 20 rows. I also use check mark accessory to identify the selected. The problem I face now is that the selection gets messed up when I scroll (here I am selecting multiple rows). So after scroll the selected checkmark has vanished. Can anyone help me to find a way? in didSelectRowAtIndexPath:
NSMutableDictionary *rowDict = [tableList objectAtIndex:[indexPath row]];
if([tableView cellForRowAtIndexPath:indexPath].accessoryType == UITableViewCellAccessoryCheckmark)
{
[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryNone;
}
else
{
[tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
checkedIndexPath = indexPath;
NSLog(#"the checked psths are :%#",checkedIndexPath);
}
And in cellforrowatIndexpath I use
if([self.checkedIndexPath isEqual:indexPath])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
But this works only for single selection. What should I do for multiple selection?

Answer 1

You can have an NSMutableArray which can add n number of NSIndexPaths corresponding to the cells selected. When a cell is deselected, you can remove that indexpath from the array.

Answer 2

You should use an array to store checked indices. If you use a single property then only the last selected row will get the correct accessoryType.

Answer 3

I used this code many times (With some minor changes as required)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
(NSIndexPath *)indexPath
{
UITableViewCell *thisCell = [tableView cellForRowAtIndexPath:indexPath];
if (thisCell.accessoryType == UITableViewCellAccessoryNone)
{
thisCell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
thisCell.accessoryType = UITableViewCellAccessoryNone;
}
}
- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView
accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath
{
//add your own code to set the cell accesory type.
return UITableViewCellAccessoryNone;
}