Last selected Row in UITableView - ios

Question

I have UITableView, in which if any row is selected i am storing some values. If any other row is selected i am displaying an alertView with warning that his previous selection will be gone. This alerView has 2 buttons YES and NO. If YES is selected go on to selecting the new row which is fine. But if no is selected i want reselect the previous row. I can post the code if asked. But it seems more of logical question than code oriented.
Thank you.

Answer 1

first store the clicked tableview index to your global variable in UITableView Delegate like below,
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView==yourTableview) {
yourMemberVariable=[indexPath row];
}
}
then check yourMemberVariable in UIAlertView delegate
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex == 0)//OK button pressed
{
//do something
}else{
if(yourMemberVariable>someValue){ //perform your own conditions whatever
[myTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:yourMemberVariable inSection:0] animated:NO scrollPosition:UITableViewScrollPositionTop];
}
}
}

Answer 2

You want to know the last row selected ,you can do this by setting
tableView.remembersLastFocusedIndexPath = true
in viewDidLoad function.
and then calling
tableView.indexPathForSelectedRow
wherever required.

Answer 3

It's simple. Just save previous row into class member. Good luck!

Answer 4

Keep track of the last selected item. On the select delegate for the table, store what was selected in a variable accessible througout the class.
NSInteger selectedRow = 0;
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
selectedRow = [indexPath row];
}
Now you know what element to select if NO is pressed in the UIAlertView delegate
[myTableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:selectedRow inSection:0] animated:NO scrollPosition:UITableViewScrollPositionTop];