Hi all,

Tic-Tac-Toe is simple game in which you will try to mark your sign in three blocks to make a row , column or diagonal.

RULES FOR TIC-TAC-TOE

1. The game is played on a grid that's 3 squares by 3 squares.

2. You are X, your friend (or the computer in this case) is O. Players take turns putting their marks in empty squares.

3. The first player to get 3 of her marks in a row (up, down, across, or diagonally) is the winner.

4. When all 9 squares are full, the game is over. If no player has 3 marks in a row, the game ends in a tie.

How to make this game in swift

1. Make a User Interface .In storyboard , Make a UILabel to show player turn and 3x3 UIButton matrix and make there action in you swift viewcontroller class. For eg :- 

2. In you UIViewController file , connect your button action like matrix [0] [0] to zeroZeroAction shown above.

@IBOutlet weak var nextTurnLbl: UILabel!
    var nextTurn:String = "X"
    
    var array: [[Int]] = [[0,0,0],[0,0,0],[0,0,0]]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        nextTurnLbl.text = "Turn :" + nextTurn
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func zeroZero(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(0,y: 0)
    }
    @IBAction func zeroOne(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(0,y: 1)
    }
    @IBAction func zeroTwo(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(0,y: 2)
    }
    @IBAction func oneZero(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(1,y: 0)
    }
    @IBAction func oneOne(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(1,y: 1)
    }
    @IBAction func oneTwo(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(1,y: 2)
    }
    @IBAction func twoZero(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(2,y: 0)
    }
    @IBAction func twoOne(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(2,y: 1)
    }
    @IBAction func twoTwo(sender: UIButton) {
        sender.setTitle(nextTurn, forState: UIControlState.Normal)
        changeTurn(2,y: 2)
    }
    
    func changeTurn(x:Int,y:Int){
        if nextTurn == "X"{
            array[x][y] = 1
            nextTurn = "0"
        }else{
            array[x][y] = 2
            nextTurn = "X"
        }
        nextTurnLbl.text = "Turn : \(nextTurn)"
        print(array)
        winCheck()
    }
    
    func winCheck(){
        var rowWin = false
        var colWin = false
        for(var a=0;a<3;a++){
            let rowCheck = array[a][0]
            let colCheck = array[0][a]
            rowWin = true
            colWin = true
            if rowCheck != 0 || colCheck != 0{
                for(var b=0;b<3;b++){
                    if (rowCheck != array[a][b] && rowCheck != 0){
                        rowWin = false
                    }
                   
                    if (colCheck != array[b][a] && colCheck != 0){
                        colWin = false
                    }
                }
                if rowWin == true && rowCheck != 0{
                    print("We have a winner")
                    alertShow(nextTurn == "X" ?"We have a winner 0":"We have a winner X")
                    break
                }
                if colWin == true && colCheck != 0 {
                    print("We have a winner")
                    alertShow(nextTurn == "X" ?"We have a winner 0":"We have a winner X")
                    break
                }
            }
        }
        
        for (var aa = 1;aa<3;aa++){
            if (array[0][0] == aa && array[1][1] == aa && array[2][2] == aa){
                print("We have a winner")
               alertShow(nextTurn == "X" ?"We have a winner 0":"We have a winner X")
                break
            }
            else if (array[0][2] == aa && array[1][1] == aa && array[2][0] == aa){
                print("We have a winner")
                alertShow(nextTurn == "X" ?"We have a winner 0":"We have a winner X")
                break
            }
        }
        var draw=true
        for (var colum = 0;colum<3;colum++){
            for (var row = 0;row<3;row++){
                if array[colum][row] == 0{
                   draw = false
                }
            }
        }
        if draw == true {
            alertShow("Match is draw")
        }
        
    }
    
    func alertShow(mess:String){
        let msgAlert = UIAlertController(title: "Result", message: mess, preferredStyle: UIAlertControllerStyle.Alert)
        
        msgAlert.addAction(UIAlertAction(title: "Dismiss", style: .Default, handler: { (action: UIAlertAction!) in
            
        }))
        
        presentViewController(msgAlert, animated: true, completion: nil)
    }
    

first remove all existing function and add these function to your viewcontroller file. Run the code and enjoy your game.

Thanks For Reading