Creating Random Number - ios

Question

I am new to the programming world and am trying my hand at a simple math app. Basically i want to app to create two random numbers and then add them together. I then put the answer in a text field where the app checks to see if the answer is right or wrong. I have created this and it works however I cannot get the numbers to regenerate after the answer is correct. Any direction you can give on this I would be much appreciative.
Here is the code.
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
override func viewDidLoad() {
super.viewDidLoad()
self.guess(self)
}
#IBOutlet weak var addend1: UILabel!
#IBOutlet weak var addend2: UILabel!
#IBOutlet weak var answer: UITextField!
#IBOutlet weak var response: UILabel!
//create numbers
let newaddend1 = arc4random() % 11
let newaddend2 = arc4random() % 11
#IBAction func guess(sender: AnyObject) {
//Convert Random Numbers to String to be displayed in labels
var firstNumber = String(newaddend1)
var secondNumber = String(newaddend2)
//convert the answer in the text field to an integer
var integer = answer?.text.toInt()
//Convert Strings to Ints so they can be added
var newFirstNumber = firstNumber.toInt()
var newSecondNumber = secondNumber.toInt()
//Add Numbers
var correctAnswer = (newFirstNumber! + newSecondNumber!)
//Display the numbers
addend1.text = firstNumber
addend2.text = secondNumber
//Print correct number to log for test
println(correctAnswer)
println(integer)
//check your answer agains the correct answer
if (integer != nil) {
if (integer == correctAnswer) {
response.text = "Correct! The Answer is \(correctAnswer)!"
} else {
response.text = "Wrongo Bongo the correct answer is \(correctAnswer)!"
}
} else {
response.text = "Please put in a number for your guess"
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//remove keyboard
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
self.view.endEditing(true)
}
func textFieldShouldReturn(textField: UITextField!) -> Bool {
answer.resignFirstResponder()
return true
}
}

Answer 1

You can initialize the variables outside of the IBAction to get class level variable declaration. Then immediately calculate new random numbers once the correct answer is generated:
let newaddend1 = 0
let newaddend2 = 0
#IBAction func guess(sender: AnyObject) {
//Convert Random Numbers to String to be displayed in labels
var firstNumber = String(newaddend1)
var secondNumber = String(newaddend2)
//convert the answer in the text field to an integer
var integer = answer?.text.toInt()
//Convert Strings to Ints so they can be added
var newFirstNumber = firstNumber.toInt()
var newSecondNumber = secondNumber.toInt()
//Add Numbers
var correctAnswer = (newFirstNumber! + newSecondNumber!)
//Display the numbers
addend1.text = firstNumber
addend2.text = secondNumber
//Print correct number to log for test
println(correctAnswer)
println(integer)
//check your answer agains the correct answer
if (integer != nil) {
if (integer == correctAnswer) {
response.text = "Correct! The Answer is \(correctAnswer)!"
let newaddend1 = arc4random() % 11
let newaddend2 = arc4random() % 11
} else {
response.text = "Wrongo Bongo the correct answer is \(correctAnswer)!"
}
} else {
response.text = "Please put in a number for your guess"
}
}