Icons on UIImage disappears - swift

Question

I'm having trouble with the icons I put on default when the app is launched. They don't appear but when I replace it with a photo taken from another controller, it doesn't disappear. Here is part of my code
I tried setting some conditionals but so far doesn't work.
//Default images
let defImage1: UIImage? = UIImage(named: "media")
let defImage2: UIImage? = UIImage(named: "media2")
class PDFViewViewController: UIViewController, UITextFieldDelegate, MFMailComposeViewControllerDelegate {
//Asset image
var image: UIImage? = nil
var secondImage: UIImage? = nil
var codigo = UserDefaults.standard.object(forKey: "code") as? String
//UI Conections
#IBOutlet weak var productPhoto: UIImageView!
#IBOutlet weak var barcodePhoto: UIImageView!
#IBOutlet weak var invNumb: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
//declaring default image to image view
productPhoto.image = defImage1
barcodePhoto.image = defImage2
//Assign new image to the view
invNumb.delegate = self
if self.invNumb != nil && self.productPhoto != defImage1 {
if image != UIImage(named: "media") {
saveImage(image: self.image!, withName: "assetPicture")
}
} else {
productPhoto.image = defImage1
}
let theSavedImage = getImage(imageName: "assetPicture")
productPhoto.image = theSavedImage
//Assign values to fields
invNumb.text = codigo
if barcodePhoto != nil {
if productPhoto != nil {
saveImage(image: self.secondImage!, withName: "barcodePicture")
}
} else {
barcodePhoto.image = defImage2
}
let theSecondSavedImage = getImage(imageName: "barcodePicture")
barcodePhoto.image = theSecondSavedImage
}
//Save asset image function
func saveImage(image: UIImage, withName name: String) {
let imageData = NSData(data: UIImageJPEGRepresentation(image, 400)!)
let paths = NSSearchPathForDirectoriesInDomains(FileManager.SearchPathDirectory.documentDirectory, FileManager.SearchPathDomainMask.userDomainMask, true)
let docs = paths[0] as NSString
let name = name
let fullPath = docs.appendingPathComponent(name)
_ = imageData.write(toFile: fullPath, atomically: true)
}
When you tapped the image it will open the camera and save the photo you take inside the image view if you don't have any photo taken, then it stays as the defImage. But when you tapped one image, the other one disappears.