Subclassing UITextField with other UI elements / Swift 5 - swift

Question

Hello everyone!)
Need some help!)
I have custom text field with input limit which was in my view controller. If you look below, you will see that my text field has: UIView (underlayer with some borders), two UILabels (name label and counter label), and UITextField inside of UIView. Now I want to make UITextField subclass and configure my text field there with whole UI-es.
MARK: - I working without storyboards, the code only.
The question is, can I implement this in UITextField class?) Or maybe better to use UIView class?)
I experimented and tried to do it in TextField class, but stuck on UIView (underlayer), I can't make it behind my text field. I add a bit of code.)
Have you any ideas how to implement this in right way?)
Thanks for every answer!)
Example
Code...
UIViewController class
import UIKit
class ViewController: UIViewController {
var inputLimitTextField = InputLimitTextField(frame: CGRect(x: 45, y: 200, width: 300, height: 40))
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(inputLimitTextField)
}
}
UITextField class
import UIKit
class InputLimitTextField: UITextField {
var underlayerView = UIView()
override init(frame: CGRect) {
super.init(frame: frame)
configureTextField()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
configureTextField()
}
func configureTextField() {
backgroundColor = .purple
underlayerView.backgroundColor = .red
underlayerView.alpha = 0.5
addSubview(underlayerView)
underlayerView.translatesAutoresizingMaskIntoConstraints = false
NSLayoutConstraint.activate([
underlayerView.topAnchor.constraint(equalTo: self.bottomAnchor),
underlayerView.centerYAnchor.constraint(equalTo: self.centerYAnchor),
underlayerView.centerXAnchor.constraint(equalTo: self.centerXAnchor)
])
}
override func layoutSubviews() {
super.layoutSubviews()
underlayerView.frame = self.bounds
sendSubviewToBack(underlayerView)
}
}

Answer 1

Considering the fact that there is still no answer to my question that would solve this issue… Also, given that using subclasses is a pretty popular practice in programming... I didn't find a specific answer to such a question on the stack. That's why I decided to answer my own question. I hope my approach to solving the problem helps someone in the future...
Code...
UIViewController class...
import UIKit
class ViewController: UIViewController, UITextFieldDelegate {
private lazy var inputLimitTextField = InputLimitTextField()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
view.addSubview(inputLimitTextField)
inputLimitTextFieldPosition()
}
private func inputLimitTextFieldPosition() {
inputLimitTextField.center.x = self.view.center.x
inputLimitTextField.center.y = self.view.center.y - 100
}
}
UITextField class...
import UIKit
class InputLimitTextField: UITextField, UITextFieldDelegate {
private lazy var nameLabel = UILabel()
private lazy var counterLabel = UILabel()
private let textLayer = CATextLayer()
private let padding = UIEdgeInsets(top: 0.5, left: 10, bottom: 0.5, right: 17)
private let purpleUIColor = UIColor(red: 0.2849253164, green: 0.1806431101, blue: 0.5, alpha: 1.0)
private let purpleCGColor = CGColor(colorSpace: CGColorSpaceCreateDeviceRGB(),
components: [0.2849253164, 0.1806431101, 0.5, 1.0])
private let redUIColor = UIColor(red: 1, green: 0.1806431101, blue: 0.09760022642, alpha: 1)
private let redCGColor = CGColor(colorSpace: CGColorSpaceCreateDeviceRGB(),
components: [ 1, 0.1806431101, 0.09760022642, 1.0])
override init(frame: CGRect) {
super.init(frame: frame)
configureTextField()
configureNameLabel()
configureCunterLabel()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
configureTextField()
configureNameLabel()
configureCunterLabel()
}
private func configureTextField() {
let screenRect = UIScreen.main.bounds
let screenWidth = screenRect.size.width - 25
let textFieldFrame = CGRect(x: 0, y: 0, width: screenWidth, height: 40)
frame = textFieldFrame
backgroundColor = .clear
textColor = purpleUIColor
font = UIFont(name: "Helvetica", size: 17)
placeholder = "Input limit"
textAlignment = .left
contentVerticalAlignment = .center
clearButtonMode = .always
autocorrectionType = .no
keyboardType = .default
returnKeyType = .done
delegate = self
textLayer.backgroundColor = UIColor.white.cgColor
textLayer.borderColor = purpleCGColor
textLayer.borderWidth = 1.2
textLayer.cornerRadius = 10
textLayer.frame = layer.bounds
layer.insertSublayer(textLayer, at: 0)
layer.shadowColor = .init(gray: 0.5, alpha: 0.5)
layer.shadowOpacity = 0.7
layer.shadowOffset = .init(width: 2, height: 2)
addSubview(nameLabel)
nameLabel.frame = CGRect(x: 12, y: -12, width: 55, height: 16)
addSubview(counterLabel)
counterLabel.frame = CGRect(x: screenWidth - 34, y: 9, width: 22, height: 22)
}
override internal func textRect(forBounds bounds: CGRect) -> CGRect {
let bounds = super.textRect(forBounds: bounds)
return bounds.inset(by: padding)
}
override internal func editingRect(forBounds bounds: CGRect) -> CGRect {
let bounds = super.editingRect(forBounds: bounds)
return bounds.inset(by: padding)
}
override internal func clearButtonRect(forBounds bounds: CGRect) -> CGRect {
let screenRect = UIScreen.main.bounds
let screenWidth = screenRect.size.width - 25
return CGRect(x: screenWidth - 70, y: 0, width: 40, height: 40)
}
private func enableUI() {
self.textLayer.borderColor = redCGColor
self.counterLabel.layer.borderColor = redCGColor
self.counterLabel.textColor = redUIColor
self.textColor = redUIColor
self.nameLabel.layer.borderColor = redCGColor
self.nameLabel.textColor = redUIColor
}
private func disableUI() {
self.textLayer.borderColor = purpleCGColor
self.counterLabel.layer.borderColor = purpleCGColor
self.counterLabel.textColor = purpleUIColor
self.textColor = purpleUIColor
self.nameLabel.layer.borderColor = purpleCGColor
self.nameLabel.textColor = purpleUIColor
}
func firstTenCharsColor(text: String) -> NSMutableAttributedString {
let characterCount = 10
let stringLength = text.utf16.count
let attributedString = NSMutableAttributedString(string: text)
if stringLength >= characterCount {
attributedString.addAttribute(.foregroundColor, value: #colorLiteral( red: 0.2849253164, green: 0.1806431101, blue: 0.5, alpha: 1), range: NSMakeRange(0, characterCount) )
}
return attributedString
}
private func updateUI(inputText: String?) {
guard let textCount = inputText?.count else { return }
guard let text = self.text else { return }
if (textCount <= 10){
self.counterLabel.text = "\(10 - textCount)"
disableUI()
} else if (textCount >= 10) {
self.counterLabel.text = "\(10 - textCount)"
enableUI()
self.attributedText = firstTenCharsColor(text: text)
}
}
func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
guard let text = self.text, let textRange = Range(range, in: text) else { return true }
let updatedText = text.replacingCharacters(in: textRange, with: string)
self.updateUI(inputText: updatedText)
return true
}
func textFieldShouldClear(_ textField: UITextField) -> Bool {
self.textLayer.borderColor = purpleCGColor
self.counterLabel.text = "10"
disableUI()
return true
}
private func configureNameLabel() {
nameLabel.backgroundColor = .white
nameLabel.layer.cornerRadius = 3
nameLabel.layer.borderWidth = 1.2
nameLabel.layer.borderColor = purpleCGColor
nameLabel.layer.masksToBounds = true
nameLabel.font = UIFont(name: "Helvetica", size: 11)
nameLabel.text = "Input limit"
nameLabel.textAlignment = .center
nameLabel.textColor = purpleUIColor
}
private func configureCunterLabel() {
counterLabel.backgroundColor = .white
counterLabel.layer.cornerRadius = 5
counterLabel.layer.borderWidth = 1.2
counterLabel.layer.borderColor = purpleCGColor
counterLabel.layer.masksToBounds = true
counterLabel.font = UIFont(name: "Helvetica", size: 12)
counterLabel.text = "10"
counterLabel.textAlignment = .center
counterLabel.textColor = purpleUIColor
}
}
You can use it for any iPhone...
Stay safe and good luck! :)