Class 'ViewController' has no initializers - Similar questions couldn't resolve issue - swift

Question

I have searched for similar questions, but they could not resolve my issue, so I hope it's ok, that I am asking it again. Here is my code:
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
#IBOutlet weak var revealLabel: UILabel!
#IBOutlet weak var scoreLabel: UILabel!
#IBOutlet weak var textField: UITextField!
var userGuess: Int
var heldUpFingers: Int
var score: Int = 0
#IBAction func startGame(sender: UIButton) {
userGuess = Int(textField.text!)!
if textField.text == nil {
revealLabel.text = "Please enter a number from 1 to 5"
} else if userGuess > 5 {
revealLabel.text = "Please enter a number from 1 to 5"
} else {
heldUpFingers = Int(arc4random_uniform(5) + 1)
if heldUpFingers == userGuess {
revealLabel.text = "You guessed right!"
score += 1
scoreLabel.text = String(score)
} else {
revealLabel.text = "Wrong, it was \(heldUpFingers)"
}
}
}
}
It gives me the error "Class 'ViewController' has no initializers" in the 3rd line. Thanks in advance!

Answer 1

It is because userGuess and heldUpFingers aren't assigned yet. You can either make these optional by adding a ? after the Int or by setting a default value to them. So either:
var userGuess: Int?
var heldUpFingers: Int?
You will then need to unwrap them/check there not nil later in your code like this:
if userGuess != nil {
//now safely use userGuess!
}
Or
var userGuess: Int = 0
var heldUpFingers: Int = 0