Swift Error: Editor placeholder in source file

Question

Hello I am implementing a graph data structure. When I try to build the application the I get the error \"Editor placeholder in source file\"

The full graph implemen

Answer 1

If you have this error while you create segues with the view controllers not with the UI elements you have to change sender: Any? to this

@IBAction func backButtonPressed(_ sender: Any) {
        performSegue(withIdentifier: "goToMainScreen", sender: self)

    }

It will work.