xcode - '#selector' refers to a method that is not exposed to Objective-C

Question

The new Xcode 7.3 passing the parameter via addTarget usually works for me but in this case it's throwing the error in the title. Any ideas? It throws another when I try to change it to @objc

Thank you!

cell.commentButton.addTarget(self, action: #selector(FeedViewController.didTapCommentButton(_:)), forControlEvents: UIControlEvents.TouchUpInside)

The selector it's calling

func didTapCommentButton(post: Post) {
}

Answer 1

In my case the function of the selector was private. Once I removed the private the error was gone. Same goes for fileprivate.

In Swift 4
You will need to add @objc to the function declaration. Until swift 4 this was implicitly inferred.