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Merged
ns-vasilev merged 3 commits into from
Dec 19, 2025
Merged

feat: add UITextView validation support #92

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952034f
feat: add UITextView validation support
ns-vasilev Dec 8, 2025
f17969d
docs: update examples
ns-vasilev Dec 11, 2025
7c3d64d
Merge branch 'main' into feature/text-view
ns-vasilev Dec 19, 2025
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37 changes: 32 additions & 5 deletions Examples/UIKit/UIKitExample/Base.lproj/Main.storyboard
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Original file line number Diff line number Diff line change
@@ -1,24 +1,51 @@
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="24127" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="In3-Gf-dmP">
<device id="retina6_12" orientation="portrait" appearance="light"/>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="24063"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="System colors in document resources" minToolsVersion="11.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" customModuleProvider="target" sceneMemberID="viewController">
<viewController id="BYZ-38-t0r" customClass="ViewController" customModule="UIKitExample" customModuleProvider="target" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
<viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
<color key="backgroundColor" systemColor="systemBackgroundColor"/>
</view>
<navigationItem key="navigationItem" id="xZX-kb-XF8"/>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="1064.885496183206" y="130.98591549295776"/>
</scene>
<!--Navigation Controller-->
<scene sceneID="jvk-0h-3ho">
<objects>
<navigationController automaticallyAdjustsScrollViewInsets="NO" id="In3-Gf-dmP" sceneMemberID="viewController">
<toolbarItems/>
<navigationBar key="navigationBar" contentMode="scaleToFill" id="xXu-9J-MCw">
<rect key="frame" x="0.0" y="118" width="393" height="54"/>
<autoresizingMask key="autoresizingMask"/>
</navigationBar>
<nil name="viewControllers"/>
<connections>
<segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="Fe5-Td-pvt"/>
</connections>
</navigationController>
<placeholder placeholderIdentifier="IBFirstResponder" id="kBa-xd-Ry9" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="138.1679389312977" y="130.98591549295776"/>
</scene>
</scenes>
<resources>
<systemColor name="systemBackgroundColor">
<color white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
</systemColor>
</resources>
</document>
16 changes: 16 additions & 0 deletions Examples/UIKit/UIKitExample/Extensions/UIView+.swift
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@@ -0,0 +1,16 @@
//
// Validator
// Copyright © 2025 Space Code. All rights reserved.
//

import UIKit

extension UIView {
func findFirstResponder() -> UIView? {
if isFirstResponder { return self }
for sub in subviews {
if let found = sub.findFirstResponder() { return found }
}
return nil
}
}
246 changes: 37 additions & 209 deletions Examples/UIKit/UIKitExample/ViewController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -10,235 +10,63 @@ import ValidatorUI
// MARK: - ViewController

final class ViewController: UIViewController {
// MARK: - Properties
private let examples: [ExampleItem] = [
ExampleItem(title: "UITextField Example", controller: LoginTextFieldExampleViewController()),
ExampleItem(title: "UITextView Example", controller: FeedbackTextViewExampleViewController()),
]

// UI
private let scrollView: UIScrollView = {
let scrollView = UIScrollView()
scrollView.translatesAutoresizingMaskIntoConstraints = false
return scrollView
}()

private let contentView: UIView = {
let view = UIView()
view.translatesAutoresizingMaskIntoConstraints = false
return view
}()

private lazy var firstNameTextField: UITextField = {
let textField = makeField("First Name")
textField.validationRules = [
LengthValidationRule(min: 2, max: 50, error: "First name should be 2–50 characters long"),
]
return textField
}()

private lazy var lastNameTextField: UITextField = {
let textField = makeField("Last Name")
textField.validationRules = [
LengthValidationRule(min: 2, max: 50, error: "Last name should be 2–50 characters long"),
]
return textField
}()

private lazy var emailTextField: UITextField = {
let textField = makeField("Email")
textField.keyboardType = .emailAddress
textField.validationRules = [
EmailValidationRule(error: "Please enter a valid email address"),
]
return textField
}()

private lazy var submitButton: UIButton = {
let button = UIButton(type: .system)
button.setTitle("Sign Up", for: .normal)
button.layer.cornerRadius = 10
button.backgroundColor = .systemGray4
button.setTitleColor(.white, for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.addTarget(self, action: #selector(submit), for: .touchUpInside)
return button
}()

private let stackView: UIStackView = {
let stackView = UIStackView()
stackView.axis = .vertical
stackView.spacing = 16
stackView.translatesAutoresizingMaskIntoConstraints = false
return stackView
}()

// Private properties
private var isValid: Bool {
[firstNameTextField, lastNameTextField, emailTextField]
.allSatisfy { $0.validationResult == .valid }
}

// MARK: - Lifecycle
private let tableView = UITableView(frame: .zero, style: .insetGrouped)

override func viewDidLoad() {
super.viewDidLoad()
title = "Examples"
view.backgroundColor = .systemBackground
configure()
}

override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
registerKeyboardNotifications()
setupTableView()
}

override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
unregisterKeyboardNotifications()
}
private func setupTableView() {
tableView.dataSource = self
tableView.delegate = self
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
tableView.translatesAutoresizingMaskIntoConstraints = false

// MARK: - UI Setup

private func configure() {
for item in [firstNameTextField, lastNameTextField, emailTextField] {
item.validationHandler = { [weak self] _ in
guard let self else { return }
updateSubmitButtonState()
}
}

[firstNameTextField, lastNameTextField, emailTextField, submitButton]
.forEach(stackView.addArrangedSubview)

view.addSubview(scrollView)
scrollView.addSubview(contentView)
contentView.addSubview(stackView)
view.addSubview(tableView)

NSLayoutConstraint.activate([
scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
scrollView.topAnchor.constraint(equalTo: view.topAnchor),
scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor),

contentView.leadingAnchor.constraint(equalTo: scrollView.leadingAnchor),
contentView.trailingAnchor.constraint(equalTo: scrollView.trailingAnchor),
contentView.topAnchor.constraint(equalTo: scrollView.topAnchor),
contentView.bottomAnchor.constraint(equalTo: scrollView.bottomAnchor),
contentView.widthAnchor.constraint(equalTo: scrollView.widthAnchor),
contentView.heightAnchor.constraint(equalTo: scrollView.heightAnchor),

stackView.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
stackView.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 24),
stackView.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -24),

submitButton.heightAnchor.constraint(equalToConstant: 48),
tableView.topAnchor.constraint(equalTo: view.topAnchor),
tableView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
tableView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
tableView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
])
}
}

private func updateSubmitButtonState() {
submitButton.isEnabled = isValid
UIView.animate(withDuration: 0.25) {
self.submitButton.backgroundColor = self.isValid ? .systemBlue : .systemGray4
}
}

// MARK: Private

private func makeField(_ placeholder: String) -> UITextField {
let textField = UITextField()
textField.placeholder = placeholder

textField.layer.cornerRadius = 10
textField.layer.borderWidth = 1
textField.layer.borderColor = UIColor.systemGray4.cgColor
textField.backgroundColor = UIColor.secondarySystemBackground
textField.textColor = .label

textField.leftView = UIView(frame: CGRect(x: 0, y: 0, width: 12, height: 0))
textField.leftViewMode = .always

textField.heightAnchor.constraint(equalToConstant: 56.0).isActive = true
textField.translatesAutoresizingMaskIntoConstraints = false
textField.validateOnInputChange(isEnabled: true)

return textField
}

// MARK: Notifications

private func registerKeyboardNotifications() {
NotificationCenter.default.addObserver(
self,
selector: #selector(keyboardWillShow(_:)),
name: UIResponder.keyboardWillShowNotification,
object: nil
)

NotificationCenter.default.addObserver(
self,
selector: #selector(keyboardWillHide(_:)),
name: UIResponder.keyboardWillHideNotification,
object: nil
)
}

private func unregisterKeyboardNotifications() {
NotificationCenter.default.removeObserver(self)
}

// MARK: - Actions

@objc
private func submit() {
guard isValid else {
let alert = UIAlertController(
title: "The form is invalid",
message: "Please check the highlighted fields and correct the entered information.",
preferredStyle: .alert
)
alert.addAction(UIAlertAction(title: "Got it", style: .default))

present(alert, animated: true)
return
}

let alert = UIAlertController(
title: "Success 🎉",
message: "Your account has been successfully created.",
preferredStyle: .alert
)
alert.addAction(UIAlertAction(title: "OK", style: .default))
// MARK: UITableViewDataSource, UITableViewDelegate

present(alert, animated: true)
extension ViewController: UITableViewDataSource, UITableViewDelegate {
func tableView(_: UITableView, numberOfRowsInSection _: Int) -> Int {
examples.count
}

@objc
private func keyboardWillShow(_ notification: Notification) {
guard
let userInfo = notification.userInfo,
let frameValue = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue
else { return }

let keyboardFrame = frameValue.cgRectValue
let bottomInset = keyboardFrame.height - view.safeAreaInsets.bottom

scrollView.contentInset.bottom = bottomInset

if let firstResponder = view.findFirstResponder(),
!scrollView.frame.contains(firstResponder.frame)
{
scrollView.scrollRectToVisible(firstResponder.frame, animated: true)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
let example = examples[indexPath.row]
cell.textLabel?.text = example.title
cell.accessoryType = .disclosureIndicator
return cell
}

@objc
private func keyboardWillHide(_: Notification) {
scrollView.contentInset.bottom = .zero
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let example = examples[indexPath.row]
navigationController?.pushViewController(example.controller, animated: true)
}
}

extension UIView {
func findFirstResponder() -> UIView? {
if isFirstResponder { return self }
for sub in subviews {
if let found = sub.findFirstResponder() { return found }
}
return nil
}
// MARK: - ExampleItem

struct ExampleItem {
let title: String
let controller: UIViewController
}
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