Custom delegate nil and not saving userDefaults

I make a delegate inside UIView to passed data to my controller and than I save it in userdefaults. but when I try to save it, it return nil. How can I save it and not return nil.

this is my code in UIView and my protocol

protocol SaveUpdateInputDelegate {
   func saveInputText()
   func fetchInputText()
}

class FormUIView: UIView {

var delegate: SaveUpdateInputDelegate?

let nameLabel = ProfileCustomLabel(textName: "Name")
let nameTextField = CustomTextField(placeholderName: "Name")

let emailLabel = ProfileCustomLabel(textName: "Email")
let emailTextField = CustomTextField(placeholderName: "Email")

let titleLabel = ProfileCustomLabel(textName: "Title")
let titleTextField = CustomTextField(placeholderName: "Title")

let locationLabel = ProfileCustomLabel(textName: "Location")
let locationTextField = CustomTextField(placeholderName: "Location")

this is my controller code that have a button to save the input text and save it in userdefaults

class ProfileController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, SaveUpdateInputDelegate {

// I need to initialized this to create autolayout
let formView: FormUIView = FormUIView()

let saveButton: UIButton = {
    let btn = UIButton(type: .system)
    btn.setTitle("Save", for: .normal)
    btn.setTitleColor(.white, for: .normal)
    btn.backgroundColor = #colorLiteral(red: 0.1254901961, green: 0.7411764706, blue: 1, alpha: 1)
    btn.layer.cornerRadius = 18
    btn.addTarget(self, action: #selector(handleSave), for: .touchUpInside)
    return btn
}()

override func viewDidLoad() {
    super.viewDidLoad()
    formView.delegate = self
    handleSave()
}

@objc func handleSave() {
    print("saved...")
    guard let data = UserDefaults.standard.object(forKey: "profileImageEditedKey") as? Data else { return }
    let image = UIImage.init(data: data)
    DispatchQueue.main.async {
        self.profileImageView.image = image?.withRenderingMode(.alwaysOriginal)
    }

    saveInputText()
    fetchInputText()
}

func saveInputText() {
    UserDefaults.standard.set(formView.nameTextField.text!, forKey: "nameTextFieldKey")
    UserDefaults.standard.set(formView.emailTextField.text!, forKey: "emailTextFieldKey")
    UserDefaults.standard.set(formView.titleTextField.text!, forKey: "titleTextFieldKey")
    UserDefaults.standard.set(formView.locationTextField.text!, forKey: "locationTextFieldKey")
    UserDefaults.standard.synchronize()
}

func fetchInputText() {
    let name = UserDefaults.standard.value(forKey: "nameTextFieldKey") as? String ?? ""
    let email = UserDefaults.standard.value(forKey: "emailTextFieldKey") as? String ?? ""
    let title = UserDefaults.standard.value(forKey: "titleTextFieldKey") as? String ?? ""
    let location = UserDefaults.standard.value(forKey: "locationTextFieldKey") as? String ?? ""

    formView.nameTextField.text = name
    formView.emailTextField.text = email
    formView.titleTextField.text = title
    formView.locationTextField.text = location
}