i have this code in my xcode wheni run its showing white blanck screen not flags at all, if i remove askQuestion() call func all flags will appreat on simulator.... could any one help me please..

import UIKit

class ViewController: UIViewController {

@IBOutlet var button1: UIButton!

@IBOutlet var button2: UIButton!

@IBOutlet var button3: UIButton!
var countries = [String]()
var score = 0

override func viewDidLoad() {
    super.viewDidLoad()

    countries += ["estonia", "frane", "germany", "ireland", "italy", "monaco", "nigeria", "poland","russia", "spain", "us", "uk"]

    askQuestion() // this point has issue i have tried run command everycode i have written to find this issue...
}

func askQuestion() { button1.setImage(UIImage(named: countries[0]), for: .normal) button2.setImage(UIImage(named: countries[1]), for: .normal) button3.setImage(UIImage(named: countries[2]), for: .normal) }

}

SOLVED!!!

flag name on the image is capital letter not small letters see code below.

countries += ["Estonia", "Frane", "Germany", "Ireland", "Italy", "Monaco", "Nigeria", "Poland","Russia", "Spain", "US", "UK"]