Unable to pass image between view controllers - swift

Question

As asked on the question. On my first VC, I have set up a function that passes an image to another VC as follows.
#objc func imageTapped(tapGestureRecognizer1: UITapGestureRecognizer) {
let passimage = tapGestureRecognizer1.view as! UIImageView
let alertController = UIAlertController(title: "...", message: "...", preferredStyle: UIAlertController.Style.alert)
let ok = UIAlertAction(title: "...", style: UIAlertAction.Style.default, handler: {(action) -> Void in
self.performSegue(withIdentifier: "Shop", sender: self)
print("image tapped")
let sb = self.storyboard?.instantiateViewController(withIdentifier: "shopVC") as! shopVC
sb.loadimage = passimage.image
self.present(sb, animated: true, completion: nil)
})
alertController.addAction(ok)
alertController.addAction(UIAlertAction(title: "取消（留在此版面）", style: UIAlertAction.Style.cancel, handler: nil))
self.present(alertController, animated: true, completion: nil)
}
whilst on the other VC, I've set up an Image View which would read the image as shown here.
class shopVC: UIViewController {
#IBOutlet weak var clothimage: UIImageView!
var loadimage: UIImage?
override func viewDidLoad() {
clothimage.image = loadimage
super.viewDidLoad()
}
I know the "passimage.image" is what I want as it shows up in the debugging window - I can't seem to place it in the second VC.

Answer 1

for change ViewController you use two Option same Time, When used individually, each:
// optionOne
self.performSegue(withIdentifier: "Shop", sender: self)
print("image tapped")
// optionTwo
let sb = self.storyboard?.instantiateViewController(withIdentifier: "shopVC") as! shopVC
sb.loadimage = passimage.image
self.present(sb, animated: true, completion: nil)
if use Option One, you must override below function from firstVC and set image directly:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let vc = segue.destination as? shopVC {
vc.image = yourImage
}
}
and if you use present for show ShopVC nothing change code just comment performSegue function.
That means only the following code:
let sb = self.storyboard?.instantiateViewController(withIdentifier: "shopVC") as! shopVC
sb.loadimage = passimage.image
self.present(sb, animated: true, completion: nil)

Answer 2

Need to call super.viewDidLoad() first and then setting up clothimage