how to know which uitableviewcell is checkmarked in facebook friendpicker?

Question

in my ios app, i want to know indexPath for UITableViewCell which is checkmarked?

basically i am trying to limit friend selection to 3 friends for that i disabled userinteraction for tableview if selection count is greater than 3. now i want to enable it again if selected row is equal to row which is checkmarked, so that user can replace the friend with another friend by unchecking any one of the current checkmarked row. i tried this :-

 #pragma mark Limiting number of friends selected to 3
- (void)friendPickerViewControllerSelectionDidChange:
(FBFriendPickerViewController *)friendPicker
{
    if ([friendPicker.selection count] <=3)
    {
        self.friendPickerController.tableView.userInteractionEnabled=YES;
    }
    if ([friendPicker.selection count] >=3)
    {
        UIAlertView *maxFriendsAlert =
        [[UIAlertView alloc] initWithTitle:@"Max number of friends selected."
                                   message:@"no more friends can be selected,"
                                  delegate:self cancelButtonTitle:@"OK"
                         otherButtonTitles:@"Buy more friends",nil];
        [maxFriendsAlert show];
        maxFriendsAlert.tag=1;

#pragma mark disable friends selection
        self.friendPickerController.tableView.userInteractionEnabled=NO;
    }

    //enable friend selection if selected row is equal to checkmarked row i.e. enable selection for previously checkmarked row
    NSIndexPath *oldindexPath1=[self.friendPickerController.selection objectAtIndex:0];
    NSIndexPath *oldindexPath2=[self.friendPickerController.selection objectAtIndex:1];
    NSIndexPath *oldindexPath3=[self.friendPickerController.selection objectAtIndex:2];

    if (self.friendPickerController.tableView.indexPathForSelectedRow==oldindexPath1||self.friendPickerController.tableView.indexPathForSelectedRow==oldindexPath2||self.friendPickerController.tableView.indexPathForSelectedRow==oldindexPath3)
    {
        self.friendPickerController.tableView.userInteractionEnabled=YES;
    }

}

problem is i cant know indexpath for uitableviewcell which is already checkmarked

Answer 1

EDIT: Aha, now I understand your issue.

Maybe this will work:

- (void)friendPickerViewControllerSelectionDidChange:(FBFriendPickerViewController *)friendPicker {

    UITableView *friendPickerTable = friendPicker.tableView;
    NSArray *indexPathsForSelectedRows = friendPickerTable.indexPathsForSelectedRows;

    NSIndexPath *indexPathForSelectedRow = friendPickerTable.indexPathForSelectedRow;

    if([indexPathsForSelectedRows containsObject:indexPathForSelectedRow]) {

        // Checked friend has previously been checked
        friendPickerTable.userInteractionEnabled = YES;

    } else {

        // New checkmark
        NSUInteger checkCount = indexPathsForSelectedRows.count;

        if (checkCount > 3) {

            // Alert the user
            UIAlertView *alert = ...
            friendPickerTable.userInteractionEnabled = NO;

        } else {

            friendPickerTable.userInteractionEnabled = YES;
        }
    }
}