What is the best way to check if a UIAlertController is already presenting?

Question

I have a tableview which, when loaded, each cell could possibly return an NSError, which I have chosen to display in a UIAlertController. Problem is I get this error in the

Answer 1

Simply dismiss the current controller and present the one you want i.e.

self.dismiss(animated: false, completion: nil)

self.displayAlertController()