Issue reusing the same UI Image code across multiple view controllers | Swift 5 - swift

Question

I have the following function I use to customize the navigation bar across almost all the apps view controllers and table view controllers - instead of replicating the code numerous times I am looking for way to easily call the function on those view controllers needing it.
I have tried wrapping in extension UIViewController { } but run into a selector issue saying the following:
Argument of '#selector' cannot refer to local function
'Tapped(tapGestureRecognizer:)'
Code:
func navBar(){
// Profile Image
let containView = UIView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.image = UIImage(url: URL(string: "test.com"))
imageView.contentMode = UIView.ContentMode.scaleAspectFit
imageView.layer.cornerRadius = 20
imageView.layer.masksToBounds = true
containView.addSubview(imageView)
let rightBarButton = UIBarButtonItem(customView: containView)
self.navigationItem.rightBarButtonItem = rightBarButton
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
imageView.isUserInteractionEnabled = true
imageView.addGestureRecognizer(tapGestureRecognizer)
}
#objc func imageTapped(tapGestureRecognizer: UITapGestureRecognizer) {
print("Profile Tapped")
}
How can this UIImage be seen in the navigation bar across various view controller without needing to rewrite the same code across all.

Answer 1

Lot a way to do it. I'll usually istance and personalize an UIViewController and use it around the whole app.
class baseController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
//call your navBar here
navbar()
}
func navBar(){
// Profile Image
let containView = UIView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
imageView.image = UIImage(url: URL(string: "test.com"))
imageView.contentMode = UIView.ContentMode.scaleAspectFit
imageView.layer.cornerRadius = 20
imageView.layer.masksToBounds = true
containView.addSubview(imageView)
let rightBarButton = UIBarButtonItem(customView: containView)
self.navigationItem.rightBarButtonItem = rightBarButton
let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(imageTapped(tapGestureRecognizer:)))
imageView.isUserInteractionEnabled = true
imageView.addGestureRecognizer(tapGestureRecognizer)
}
}
Now instance this class whenever you want and your controller will get your navBar() every time with this
class mineController:baseController {
//your code here...
}