Protocol delegate not giving desired result - ios

Question

A simple profile page with an image to display based on what i select on the settings page, different files for controller and view, click on tick of profile go to settings page, select image1 or image2 and that image must display on profile page ,i try and create a protocol on settings to be able to add image , then implement a delegate on profile view file so that it can update the image its not working, can any one please point out my error
SettingsController
import UIKit
protocol ShowImage: class {
func displayImage(_ of: UIImage)
}
class SettingsController: UIViewController {
weak var delegate: ShowImage?
override func viewDidLoad() {
super.viewDidLoad()
let settings = SettingsView()
view.addSubview(settings.view)
settings.btn1.addTarget(self, action: #selector(dCode), for: .touchUpInside)
// Do any additional setup after loading the view.
}
#objc func dCode() {
let image = UIImage(named: "homei")
delegate?.displayImage(image!)
navigationController?.pushViewController(ProfileController(), animated: true)
}
}
SettingsView
import UIKit
class SettingsView: UIViewController {
var btn1 = UIButton()
var btn2 = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
view.translatesAutoresizingMaskIntoConstraints = false
view.heightAnchor.constraint(equalToConstant: UIScreen.main.bounds.height).isActive = true
view.widthAnchor.constraint(equalToConstant: UIScreen.main.bounds.width).isActive = true
view.backgroundColor = UIColor.white
btn1.heightAnchor.constraint(equalToConstant: 30).isActive = true
btn1.widthAnchor.constraint(equalToConstant: 150).isActive = true
btn1.setTitleColor(UIColor.red, for: .normal)
btn1.backgroundColor = UIColor.green
btn2.heightAnchor.constraint(equalToConstant: 30).isActive = true
btn2.widthAnchor.constraint(equalToConstant: 150).isActive = true
btn2.setTitleColor(UIColor.red, for: .normal)
btn2.backgroundColor = UIColor.green
btn1.setTitle("Image1", for: .normal)
btn2.setTitle("Image2", for: .normal)
let stackP = UIStackView()
stackP.axis = .horizontal
stackP.alignment = .top
stackP.spacing = 10
stackP.distribution = .fill
stackP.addArrangedSubview(btn1)
stackP.addArrangedSubview(btn2)
stackP.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(stackP)
stackP.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
stackP.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
// Do any additional setup after loading the view.
}
}
Profile Controller
import UIKit
class ProfileController: UIViewController {
let profile = ProfileView()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(profile.view)
// Do any additional setup after loading the view.
profile.settingsBtn.addTarget(self, action: #selector(gotoSettings), for: .touchUpInside)
}
#objc func gotoSettings(){
let settings = SettingsController()
navigationController?.pushViewController(settings, animated: true)
}
}
Profile View
import UIKit
class ProfileView: UIViewController, ShowImage{
func displayImage(_ of: UIImage) {
apply(img: of)
}
var bgImage = UIImageView()
var settingsBtn = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
view.translatesAutoresizingMaskIntoConstraints = false
view.heightAnchor.constraint(equalToConstant: UIScreen.main.bounds.height).isActive = true
view.widthAnchor.constraint(equalToConstant: UIScreen.main.bounds.width).isActive = true
bgImage.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(bgImage)
bgImage.heightAnchor.constraint(equalToConstant: UIScreen.main.bounds.height).isActive = true
bgImage.widthAnchor.constraint(equalToConstant: UIScreen.main.bounds.width).isActive = true
settingsBtn.heightAnchor.constraint(equalToConstant: 60).isActive = true
settingsBtn.widthAnchor.constraint(equalToConstant: 60).isActive = true
// settingsBtn.setTitle("Settings", for: .normal)
settingsBtn.setImage(UIImage(named: "tick"), for: .normal)
settingsBtn.backgroundColor = UIColor.red
settingsBtn.layer.cornerRadius = 5
view.addSubview(settingsBtn)
settingsBtn.translatesAutoresizingMaskIntoConstraints = false
settingsBtn.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -30).isActive = true
settingsBtn.topAnchor.constraint(equalTo: view.topAnchor, constant: 70).isActive = true
let set = SettingsController()
set.delegate = self
// Do any additional setup after loading the view.
}
func apply(img: UIImage)
{
bgImage.image = img
}
}
enter image description here

Answer 1

let set = SettingsController()
set.delegate = self
You're making a brand new SettingsController, setting its delegate... and then doing nothing with it. You probably want to find the existing SettingsController that is on the screen, though you have a very confusing system here with xView and xController, both of which are view controllers, so it's hard to know what's going on.