override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) // Error: no method to override
override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) // Error: no method to override
override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) // Error: no method to override
Error:
duplicate-error E385: The method found in the base class to override
"touchesBegan(NSSet!, withEvent UIEvent!)" does not match the signature
"touchesBegan(Set, withEvent UIEvent)"