Home Random image core- Background shows up when button tapped
 I'm trying to generate random images when I tap a button, but when I tap the button, both images disappear and only the background shows up. Here is my code: @IBAction func PickerTapped(sender: UIButton) { //randomize a number for the first image var firstrandomNumber = arc4random_uniform(7) + 1 //construct a string with a random number var firstLeftHandImageString: String = String(format: "rud%i", firstrandomNumber) // set the left hand image view to the asset corresponding to the randomized number self.LeftHandImageView.image = UIImage(named: "firstLeftHandImageString") //randomize a number for the second image var secondrandomNumber = arc4random_uniform(7) + 1 //construct a string with a random number var secondRightHandImageString: String = String(format: "rud%i", secondrandomNumber) //set the right hand image view to the asset corresponding to the randomized number self.RightHandImageView.image = UIImage(named: "secondRightHandImageString") }