NSKeyedArchiver does not work in Swift 3 ( XCode 8)

Question

I have migrated my project to Swift 3 and NSKeyedArchiver does not work. I actually have a runtime error when trying to decode object like this:

let         


        

Answer 1

Swift 3:

I adopt the double question mark (??) method and it work like a charm in only one line.

If val is not nil than it is unwrapped and the value returned. If it is nil then aDecoder.decodeInteger(forKey: "val") returned:

self.val = aDecoder.decodeObject(forKey: "val") as? Int ?? aDecoder.decodeInteger(forKey: "val")