How to set automatic height of static cell in UITableViewController?

Question

I am using IB and storyboard and I defined UITableViewController. There I defined three static cells. The first two should have a given height but the last one should automatically fill the remaining space (anchor to the bottom of the view). How can I achieve this? I can use autolayout for the controls inside the cell but it is greyed out for the cell itself.

The best solution would be to do this from IB but programmatic solutions are also welcomed.

EDIT:

This is how it looks in my storyboard (colors are for visualizing separate controls, each control has required constraints):

And after launching: Note that the text view ends below the bottom of the screen.

I forgot to mention that I target iOS 7.0+.

Answer 1

Ok try this

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat{

    if indexPath.row == 0 { 
        return firstRowHeight
    }
    else if indexPath.row == 1 { 
        return secondRowHeight 
    }
    else { 
        return tableView.frame.size.height - firstRowHeight - secondRowHeight 
    }
}

The only thing that may be a problem is that this method is going to run before the view sets the tableView height