swift ? must be followed by a call, member lookup, or subscript

Question

I think I\'m looking at some outdated code:

@IBAction func stockLevelDidChange(sender: AnyObject) {
        if var currentCell = sender as? UIView {
                 


        

Answer 1

Actually the as? are all fine. The problem is this line:

if let id = cell.productId?

Just remove the question mark at the end of that. It makes no sense.