Fix selector signature

README.md

@@ -157,7 +157,7 @@ let reachability = Reachability()!
 
 //declare this inside of viewWillAppear
 
-     NotificationCenter.default.addObserver(self, selector: #selector(reachabilityChanged(_:)), name: .reachabilityChanged, object: reachability)
+     NotificationCenter.default.addObserver(self, selector: #selector(reachabilityChanged(note:)), name: .reachabilityChanged, object: reachability)
     do{
       try reachability.startNotifier()
     }catch{