if let
/if var
optional binding only works when the result of the right side of the expression is an optional. If the result of the right side is not an optional, you can not use this optional binding. The point of this optional binding is to check for nil
and only use the variable if it’s non-nil
.
In your case, the tableView
parameter is declared as the non-optional type UITableView
. It is guaranteed to never be nil
. So optional binding here is unnecessary.
func tableView(tableView: UITableView, commitEditingStyle editingStyle:UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
if editingStyle == .Delete {
// Delete the row from the data source
myData.removeAtIndex(indexPath.row)
tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
All we have to do is get rid of the if let
and change any occurrences of tv
within it to just tableView
.