my Callback in CollectionViewCell doesn't work correctly - swift

Question

I have a simple CollectionViewCell with PhoneNumberTextField and a callback that I want to send to my server
class PhoneNumberCollectionViewCell: UICollectionViewCell, NiBLoadable, UITextFieldDelegate {
#IBOutlet weak var phoneLabel: UILabel!
#IBOutlet weak var PhoneNumberTextField: UITextField!
#IBOutlet weak var SecurityLabel: UILabel!
var returnValue: ((_ value: String) -> ())?
override func awakeFromNib() {
super.awakeFromNib()
Decorator.decorate(self)
}
func setPhoneLabelText(text: String) {
phoneLabel.text = text
}
func setSecurityLabel(text: String) {
SecurityLabel.text = text
}
func textFieldDidEndEditing(_ textField: UITextField) {
returnValue?(PhoneNumberTextField.text ?? "") // Use callback to return data
}
}
and I also have my ViewController with my CollectionView and I cant get my phoneNumber from cell to variable in ViewController. Here is come code
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let models = model[indexPath.row]
switch models {
case .phoneNumber:
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: PhoneNumberCollectionViewCell.name, for: indexPath) as? PhoneNumberCollectionViewCell {
cell.setSecurityLabel(text: "_ALLYOURDATAISINSECUREDAREA")
cell.setPhoneLabelText(text: "_YOURPHONENUMBER")
cell.PhoneNumberTextField.text = phoneNumber
cell.returnValue = { value in
self.phoneNumber = value
}
return cell
}
and when I print what I got from textField I got nil
#objc func sendPhoneNumber() {
print("PHONE NUMBER IS - \(String(describing: self.phoneNumber))")
}
what's wrong am I doing???

Answer 1

You need to set the delegate for the textField, or the textField delegates wont work.
override func awakeFromNib() {
super.awakeFromNib()
Decorator.decorate(self)
PhoneNumberTextField.delegate = self
}
Side note:
Don't capitalize variables and constants.
Edit to secondary question:
You either want to (through the Xib) make an IBAction outlet that is called on value changed, or:
textField.addTarget(self, action: #selector(textFieldValueChanged), for: .editingChanged)
both options will call the delegate function every time a letter is typed or removed.

Answer 2

Have you registered your collection view cell and declare the delegate and datasource?
let flowLayout = UICollectionViewFlowLayout()
let collectionView = UICollectionView(frame: .zero, collectionViewLayout: flowLayout)
collectionView(PhoneNumberCollectionViewCell.self, forCellWithReuseIdentifier: PhoneNumberCollectionViewCell.name)
collectionView.delegate = self
collectionView.dataSource = self
return collectionView