UITapGestureRecognizer not working in Swift 3.0

Question

This may seem really simple, but I've been tearing my hair out for a while now wondering why this isn't working. I'm trying to change the image when tapped on, but it doesn't seem to recognise the tap at all. I have enabled user interaction both on the storyboard and programatically, so am a little lost.

override func viewDidLoad() {
    super.viewDidLoad()

    tL.isUserInteractionEnabled = true

    x = UIImage(named: "Cross.jpg")
    reset = UIImage(named: "white.png")

    //Tap Gesture ------------------------------------------------------------

    let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(Logic))
    gestureRecognizer.numberOfTapsRequired = 1

    tL.addGestureRecognizer(gestureRecognizer)
}

func Logic(_ sender: UITapGestureRecognizer) {
    let tappedView = sender.view as! UIImageView
    tappedView.image = x
    print("Image Tapped")
}

Edited. It's not actually inside, I cut out a lot of code due to it not being needed. Still not working. — SwiftBeginner, Dec 15 '16 at 19:04
UITapGestureRecoginzer works fine in swift3. Your code, if gestureRecognizer is inside viewDidLoad() and func logic is outside viewDidLoad() should works fine too. Issue is something else. — dejix, Dec 15 '16 at 19:23
@SwiftBeginner Did you figure this out im having the exact same issue, — Sealer_05, Nov 03 '18 at 06:15

score 3 · Answer 1 · answered Dec 17 '16 at 17:09

fun Logic needs 1 argument, you should provide as such in your selector. Change from

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(Logic))

to

let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(yourClassName.Logic(_ : )))

UITapGestureRecognizer not working in Swift 3.0

1 Answers1