How to dynamically resize UITableViewCell height

Question

I have the classical grouped UITableView with editable UITextViews inside every cell. This text views can be single or multi-lined, and I want the cell to increase its heigh

Answer 1

To be more specific, yes, you have to implement tableView:heightForRowAtIndexPath: to calculate the new height, then do as rickharrison says and call [tableView reloadRowsAtIndexPaths:withRowAnimation]. Lets say your cells can have an expanded height and a normal height, and you want them to grow when tapped on. You can do:

-(CGFloat)tableView:(UITableView*)tableView heightForRowAtIndexPath:(NSIndexPath*) indexPath 
{
    if ([expandedPaths containsObject:indexPath]) {
        return 80;
    } else {
        return 44;
    }
 }

-(void)tableView:(UITableView*) didSelectRowAtIndexPath:(NSIndexPath*) indexPath
{
    [expandedPaths addObject:indexPath];
    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}

Answer 2

You do not always have to reload the entire table. You can instead just reload that one row.

[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]] withRowAnimation:UITableViewRowAnimationFade];

Answer 3

-reloadRowsAtIndexPaths:withRowAnimation did not resize the UITableViewCell height, even after I changed the Cell's frame. It only worked when I followed it with a -reloadData:

[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]] withRowAnimation:UITableViewRowAnimationFade];
[tableView reloadData];

Answer 4

[tableView beginUpdates];
[tableView endUpdates];