challenge_4_answer.swift

class ViewController: UIViewController {

    var score = 0

    @IBOutlet weak var numberButton: UIButton!

    @IBAction func numberButtonTapped(sender: UIButton) {
        let calculator = Calculator()
        if calculator.check(score + 1) == "Number" {
            incrementScore()
        }
    }

    @IBAction func fizzButtonTapped(sender: UIButton) {
        let calculator = Calculator()
        if calculator.check(score + 1) == "Fizz" {
            incrementScore()
        }
    }

    @IBAction func buzzButtonTapped(sender: UIButton) {
        let calculator = Calculator()
        if calculator.check(score + 1) == "Buzz" {
            incrementScore()
        }
    }

    @IBAction func fizzBuzzButtonTapped(sender: UIButton) {
        let calculator = Calculator()
        if calculator.check(score + 1) == "FizzBuzz" {
            incrementScore()
        }
    }

    func incrementScore() {
        score += 1
        numberButton.setTitle("\(score)", forState: .Normal)
    }

}