KolodaView delegate method not working

Question

I'm using KolodaView library to create a Tinder-like swipe view: https://github.com/Yalantis/Koloda

I implemented delegate method in my ViewController like this:

class ViewController: UIViewController {

    @IBOutlet weak var kolodaView: KolodaView!

    override func viewDidLoad() {
    super.viewDidLoad()

    kolodaView.dataSource = self
    kolodaView.delegate = self

}

extension ViewController: KolodaViewDelegate {

func koloda(koloda: KolodaView, didSwipeCardAtIndex index: UInt, inDirection direction: SwipeResultDirection) {

    if direction == .Right {
        print("apple")
    } else if direction == .Left {
        print("cherry")
    }
}
}

It's supposed to print apple or cherry when I swipe the card, but it does nothing when I ran it.

Answer 1

OMG you have no idea, this is the most classic/stupid bug I ever made!

Actually, the original code works, it just didn't print in Xcode, because ->

I ACCIDENTLY DEACITVATED THE CONSOLE!

After I tried all the methods offered by all the kind people, I finally realized my debug area looked empty like this:

Then I clicked View -> Debug Area -> Activate Console

Then I finally saw the print :D