Question

I have a UITableViewCell that I need to resize as the user types. The cell has a UITextView as a subview.

Inside heightForRowAtIndexPath, I need to check whether the current cell is nil or initialized.

If it’s nil, I calculate its height based on text in a string property.

If it’s NOT nil (i.e. initialized), I want it to retrieve the text property of the cell’s subview (I know I can access it if the cell is initialized).

How can I check if a UITableViewCell is nil or not within heightForRowAtIndexPath:? I tried

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([overviewTableView cellForRowAtIndexPath:indexPath] !=nil)
    {    NSLog(@"YEEHAW!");
    }
}

but it results in an error (probably because cellForRowAtIndexPath: expects the cell to be initialized, not nil). Also, I noticed that cellForRowAtIndexPath: calls heightForRowAtIndexPath: (resulting in a recursive loop).

I’ve seen many “alternatives” on the web, but I was just wondering whether this approach is would work (or is valid at all).

Thanks in advance!

Answer 1

You could check if the indexPath for the cell of interest is visible or not:

if ([[overviewTableView indexPathsForVisibleRows] containsObject:indexPath])
{
    //Do something here
}

Hope this helps!