Question

I have a UITableView and some UITableViewCells which i have created manually via the Interface Builder. I’ve assigned each cell an outlet, and im connecting them to the UITableView in the CellForRowAtIndexPath method. In this method, I use the switch(case) method to make specific cells appear in the UITableView, depends on the case.

Now, I want to find a specific cell and check if he is exists within the UITableView. I use the method: UITableView.visibleCells to get an array of the cells in the table view. My question is – how can i check if a specific cells exists in the array? can I use the outlet that i’ve assigned to it somehow? – (The best solution),OR, can I use an identifier and how?

Thanks 🙂

Answer 1

Note that you can as well use indexPathsForVisibleRows this way:

    NSUInteger index = [_people indexOfObject:person];
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];
    if ([self.tableView.indexPathsForVisibleRows containsObject:indexPath]) {
      [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] 
                            withRowAnimation:UITableViewRowAnimationFade];
    }

If you have the indexPath (and don’t need the actual Cell) it might be cheaper.

PS: _people is the NSArray used as my backend in this case.