Swift: prevent tic tac toe double tap? - swift

Question

I have a tic tac toe game here in Swift and I need a way to disable tap gesture recognition on spaces that have been played so that on their turn, the user cannot just tap places that have been played.
I have tried putting the line
ticTacImages[spot].removeGestureRecognizer(UITapGestureRecognizer(target: self, action: "imageClicked:"))
in my imageClicked and setImageForSpot functions and nothing happens. What am I doing wrong here?
The code involved:
for imageView in ticTacImages {
imageView.userInteractionEnabled = true
imageView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: "imageClicked:"))
}
}
//Gesture Reocgnizer method
func imageClicked(reco: UITapGestureRecognizer) {
var imageViewTapped = reco.view as UIImageView
println(plays[imageViewTapped.tag])
println(aiDeciding)
println(done)
opening1.hidden = true
opening2.hidden = true
opening3.hidden = true
if plays[imageViewTapped.tag] == nil && !aiDeciding && !done {
setImageForSpot(imageViewTapped.tag, player:.UserPlayer)
}
checkForWin()
let delay = 1 * Double(NSEC_PER_SEC)
let time = dispatch_time(DISPATCH_TIME_NOW, Int64(delay))
//During delay
for imageView in ticTacImages {
imageView.userInteractionEnabled = false
}
dispatch_after(time, dispatch_get_main_queue(), {
//After delay
for imageView in self.ticTacImages {
imageView.userInteractionEnabled = true
}
self.aiTurn()
})
}
var varChanger: Int?
var playerMark: String?
func setImageForSpot(spot:Int,player:Player){
if varChanger == 1 {
playerMark = player == .UserPlayer ? "blue_x" : "blue_o"
}
else if varChanger == 2 {
playerMark = player == .UserPlayer ? "green_x" : "green_o"
}
else if varChanger == 3 {
playerMark = player == .UserPlayer ? "purple_x" : "purple_o"
}
else if varChanger == 4 {
playerMark = player == .UserPlayer ? "pink_x" : "pink_o"
}
else if varChanger == 5 {
playerMark = player == .UserPlayer ? "yellow_x" : "yellow_o"
}
else {
playerMark = player == .UserPlayer ? "red_x" : "red_o"
}
println("setting spot \(player.toRaw()) spot \(spot)")
plays[spot] = player.toRaw()
ticTacImages[spot].image = UIImage(named: playerMark)
}

Answer 1

You can only removeGestureRecognizer() for a gesture recognizer that has already been added. In your example you're creating a new one before removing it — instead you should keep track of the old one, or call ticTacImages[spot].gestureRecognizers to get an array of the ones which have been added.