Custom UITextfield with picker

All.swift

//: A UIKit based Playground for presenting user interface
  
import UIKit
import PlaygroundSupport

class CustomTextField: UITextField {
    
    weak var presenter: UIViewController!
    
    override func becomeFirstResponder() -> Bool {
        
        let alertSheet = UIAlertController(title: "Opciones", message: "Mensaje", preferredStyle: .actionSheet)
        
        let buttonOneAction = UIAlertAction(title: "Opcion uno", style: .default) { action in
            // Select item
        }
        
        let buttonTwoAction = UIAlertAction(title: "Opcion uno", style: .default) { action in
            // Select item
        }
        
        alertSheet.addAction(buttonOneAction)
        alertSheet.addAction(buttonTwoAction)
        
        return true
    }
    
}

struct FieldsRepository {
    var fields: [TextFieldViewModel]
}

struct TextFieldViewModel: Identifiable {
    var id: UUID
    
    var textFieldName: String
    var placeHolder: String
    var validations: [()->Bool]?
    var lengthValidationRange: Range<Int>
}


class PickerTextfieldCollectionViewCell: UICollectionViewCell, UITextFieldDelegate {
    
    var textFieldViewModel: TextFieldViewModel!
    
    private lazy var fieldStackView: UIStackView = {
        let stackView = UIStackView()
        stackView.axis = .horizontal
        stackView.alignment = .center
        stackView.distribution = .fillProportionally
        return stackView
    }()
    
    private lazy var pickerTextfieldLabel: UILabel = {
        let label = UILabel()
        label.textColor = .blue
        label.font = UIFont.systemFont(ofSize: 17, weight: .bold)
        return label
    }()
    
    private lazy var pickerTextField: CustomTextField = {
        let textField = CustomTextField()
        return textField
    }()
    
    private lazy var overlayButton: UIButton = {
        let button = UIButton()
        return button
    }()
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        self.configureViews()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        self.configureViews()
    }
    
    override func prepareForReuse() {
        pickerTextField.text = ""
        pickerTextField.placeholder = ""
    }
    
    private func configureViews() {
        
        pickerTextField.delegate = self
        
        self.fieldStackView.addArrangedSubview(pickerTextfieldLabel)
        self.fieldStackView.addArrangedSubview(pickerTextField)
        
        self.addSubview(self.fieldStackView)
//        self.addSubview(self.overlayButton)
        
        NSLayoutConstraint.activate([
            self.fieldStackView.topAnchor.constraint(equalTo: self.topAnchor),
            self.fieldStackView.bottomAnchor.constraint(equalTo: self.bottomAnchor),
            self.fieldStackView.leftAnchor.constraint(equalTo: self.leftAnchor),
            self.fieldStackView.rightAnchor.constraint(equalTo: self.rightAnchor),
            
//            self.overlayButton.topAnchor.constraint(equalTo: self.topAnchor),
//            self.overlayButton.bottomAnchor.constraint(equalTo: self.bottomAnchor),
//            self.overlayButton.leftAnchor.constraint(equalTo: self.leftAnchor),
//            self.overlayButton.rightAnchor.constraint(equalTo: self.rightAnchor),
        ])
    }
    
    func configureCellData(viewModel: TextFieldViewModel) {
        pickerTextField.placeholder = textFieldViewModel.placeHolder
    }
    
    // MARK: - UITextFieldDelegate
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        
        return true
    }
    
}

class MyViewController : UIViewController {
    
    private lazy var contentStackView: UIStackView = {
        let stackView = UIStackView()
        stackView.axis = .vertical
        stackView.alignment = .fill
        stackView.distribution = .fill
        return stackView
    }()
    
    private lazy var collectionView: UICollectionView = {
        let collectionView = UICollectionView()
        return collectionView
    }()
    
    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white
                
        view.addSubview(contentStackView)
        NSLayoutConstraint.activate([
            contentStackView.topAnchor.constraint(equalTo: view.topAnchor),
            contentStackView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            contentStackView.leftAnchor.constraint(equalTo: view.leftAnchor),
            contentStackView.rightAnchor.constraint(equalTo: view.rightAnchor),
        ])
        
        self.view = view
    }
}
// Present the view controller in the Live View window
let myVC = MyViewController()
myVC.preferredContentSize = CGSize(width: 300, height: 100)
PlaygroundPage.current.liveView = myVC