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//
// STTextField.swift
// STBaseProject
//
// Created by 寒江孤影 on 2018/10/12.
//
import UIKit
private enum STTextFieldLocalizationKey {
static var localizedPlaceholderKey: UInt8 = 0
}
public protocol STTextFieldDelegate: NSObjectProtocol {
func st_textFieldEditingChanged(textField: STTextField)
func st_textFieldBackwardKeyPressed(textField: STTextField)
}
public extension STTextFieldDelegate {
func st_textFieldEditingChanged(textField: STTextField) {}
func st_textFieldBackwardKeyPressed(textField: STTextField) {}
}
@IBDesignable
open class STTextField: UITextField {
open var textIsCheck: Bool = false
open weak var cusDelegate: STTextFieldDelegate?
private var contentInsetLeft: CGFloat = 0
private var contentInsetRight: CGFloat = 0
private var savaText: String = ""
private var showPasswordIcon: UIImage?
private var hidePasswordIcon: UIImage?
private var passwordToggleButton: UIButton?
private var isPasswordToggleEnabled: Bool = false
private var isChangingSecureTextEntry: Bool = false
private var preservedText: String = ""
private var secureTextEntryObserver: NSKeyValueObservation?
@IBInspectable open var localizedPlaceholder: String {
get {
return objc_getAssociatedObject(self, &STTextFieldLocalizationKey.localizedPlaceholderKey) as? String ?? ""
}
set {
objc_setAssociatedObject(self, &STTextFieldLocalizationKey.localizedPlaceholderKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC)
self.placeholder = newValue.localized
}
}
@IBInspectable open var cornerRadius: CGFloat {
get {
return self.layer.cornerRadius
}
set {
self.layer.cornerRadius = newValue
self.st_updateLiquidGlassCornerRadius()
}
}
@IBInspectable open var clipsContentToBounds: Bool {
get {
return self.layer.masksToBounds
}
set {
self.layer.masksToBounds = newValue
}
}
@IBInspectable open var borderWidth: CGFloat {
get {
return self.layer.borderWidth
}
set {
self.layer.borderWidth = newValue > 0 ? newValue : 0
}
}
@IBInspectable open var borderColor: UIColor {
get {
guard let cgColor = self.layer.borderColor else {
return .clear
}
return UIColor(cgColor: cgColor)
}
set {
self.layer.borderColor = newValue.cgColor
}
}
@IBInspectable open var isLiquidGlassEnabled: Bool = false {
didSet {
if self.isLiquidGlassEnabled {
self.updateLiquidGlassBackground()
} else {
self.st_disableLiquidGlassBackground()
}
}
}
@IBInspectable open var liquidGlassTintColor: UIColor = UIColor.white.withAlphaComponent(0.18) {
didSet {
self.updateLiquidGlassBackground()
}
}
@IBInspectable open var liquidGlassHighlightOpacity: Float = 0.45 {
didSet {
self.updateLiquidGlassBackground()
}
}
@IBInspectable open var liquidGlassBorderColor: UIColor = UIColor.white.withAlphaComponent(0.45) {
didSet {
self.updateLiquidGlassBackground()
}
}
@IBInspectable open var textInsetLeft: CGFloat {
get {
return self.contentInsetLeft
}
set {
self.contentInsetLeft = max(0, newValue)
self.setNeedsLayout()
}
}
@IBInspectable open var textInsetRight: CGFloat {
get {
return self.contentInsetRight
}
set {
self.contentInsetRight = max(0, newValue)
self.setNeedsLayout()
}
}
@IBInspectable open var maxTextCount: Int = -1 {
didSet {
self.enforceTextCountIfNeeded(for: self)
}
}
override public init(frame: CGRect) {
super.init(frame: frame)
self.config()
}
public required init?(coder: NSCoder) {
super.init(coder: coder)
self.config()
}
deinit {
self.removeSecureTextEntryObserver()
}
override open func deleteBackward() {
super.deleteBackward()
if let delegate = self.cusDelegate {
delegate.st_textFieldBackwardKeyPressed(textField: self)
}
}
override open func textRect(forBounds bounds: CGRect) -> CGRect {
let inset = CGRect(x: bounds.origin.x + self.contentInsetLeft, y: bounds.origin.y, width: bounds.size.width - self.contentInsetLeft - self.contentInsetRight, height: bounds.size.height)
return inset
}
override open func editingRect(forBounds bounds: CGRect) -> CGRect {
let inset = CGRect(x: bounds.origin.x + self.contentInsetLeft, y: bounds.origin.y, width: bounds.size.width - self.contentInsetLeft - self.contentInsetRight, height: bounds.size.height)
return inset
}
override open func leftViewRect(forBounds bounds: CGRect) -> CGRect {
if let newView = self.leftView {
let frame = newView.frame
let x = bounds.origin.x
let y = (bounds.size.height - frame.size.height) / 2.0
return CGRect(x: x, y: y, width: frame.size.width, height: frame.size.height)
}
return CGRect.zero
}
override open func rightViewRect(forBounds bounds: CGRect) -> CGRect {
if let newView = self.rightView {
let frame = newView.frame
let x = bounds.width - frame.width
let y = (bounds.height - frame.height) / 2
return CGRect(x: x, y: y, width: frame.width, height: frame.height)
}
return CGRect.zero
}
override open func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
if let rightView = self.rightView {
let rightViewFrame = self.rightViewRect(forBounds: self.bounds)
if rightViewFrame.contains(point) {
let pointInRightView = CGPoint(x: point.x - rightViewFrame.origin.x, y: point.y - rightViewFrame.origin.y)
if let hitView = rightView.hitTest(pointInRightView, with: event) {
return hitView
}
}
}
return super.hitTest(point, with: event)
}
override open func layoutSubviews() {
super.layoutSubviews()
self.st_updateLiquidGlassCornerRadius()
if self.isPasswordToggleEnabled, let container = self.rightView, let button = self.passwordToggleButton {
button.center = CGPoint(x: container.bounds.midX, y: container.bounds.midY)
}
}
private func config() {
self.configContent()
self.addEditingChangedTarget()
}
private func configContent() {
self.clearButtonMode = .whileEditing
self.autocorrectionType = UITextAutocorrectionType.no
self.autocapitalizationType = UITextAutocapitalizationType.none
}
private func addEditingChangedTarget() {
self.addTarget(self, action: #selector(st_textFieldEditingChanged(textField:)), for: .editingChanged)
}
public func setTextInsets(left: CGFloat, right: CGFloat) {
self.contentInsetLeft = max(0, left)
self.contentInsetRight = max(0, right)
self.setNeedsLayout()
}
public func config(textLimitCount: Int) {
self.maxTextCount = textLimitCount
}
public func configAttributed(textColor: UIColor) {
if let attributedText = self.attributedPlaceholder {
let placeholderAttributedString = NSMutableAttributedString(attributedString: attributedText)
placeholderAttributedString.addAttribute(.foregroundColor, value: textColor, range: NSRange(location: 0, length: placeholderAttributedString.length))
self.attributedPlaceholder = placeholderAttributedString
}
}
public func configAttributed(text: String, textColor: UIColor) {
if !text.isEmpty {
let placeholderAttributedString = NSMutableAttributedString(attributedString: NSAttributedString(string: text))
placeholderAttributedString.addAttribute(.foregroundColor, value: textColor, range: NSRange(location: 0, length: placeholderAttributedString.length))
self.attributedPlaceholder = placeholderAttributedString
}
}
public func st_updateLocalizedPlaceholder() {
if !self.localizedPlaceholder.isEmpty {
self.placeholder = self.localizedPlaceholder.localized
}
}
// MARK: - 密码切换功能
/// 启用密码切换功能（使用默认图标）
public func st_enablePasswordToggle() {
self.st_enablePasswordToggle(showIcon: nil, hideIcon: nil)
}
/// 启用密码切换功能（支持自定义图标）
public func st_enablePasswordToggle(showIcon: UIImage?, hideIcon: UIImage?) {
guard !self.isPasswordToggleEnabled else { return }
self.isPasswordToggleEnabled = true
self.showPasswordIcon = showIcon
self.hidePasswordIcon = hideIcon
self.isSecureTextEntry = true
self.setupPasswordToggle()
self.setupSecureTextEntryObserver()
}
/// 禁用密码切换功能
public func st_disablePasswordToggle() {
guard self.isPasswordToggleEnabled else { return }
self.isPasswordToggleEnabled = false
self.rightView = nil
self.rightViewMode = .never
self.passwordToggleButton = nil
self.removeSecureTextEntryObserver()
}
/// 更新密码切换图标
public func st_updatePasswordToggleIcons(showIcon: UIImage?, hideIcon: UIImage?) {
guard self.isPasswordToggleEnabled else { return }
self.showPasswordIcon = showIcon
self.hidePasswordIcon = hideIcon
if let button = self.passwordToggleButton {
let showIcon = self.showPasswordIcon ?? UIImage(systemName: "eye")
let hideIcon = self.hidePasswordIcon ?? UIImage(systemName: "eye.slash")
button.setImage(showIcon, for: .normal)
button.setImage(hideIcon, for: .selected)
}
}
/// 设置密码切换按钮颜色
public func st_setPasswordToggleButtonColor(_ color: UIColor) {
self.passwordToggleButton?.tintColor = color
}
/// 设置isSecureTextEntry的KVO监听
private func setupSecureTextEntryObserver() {
self.removeSecureTextEntryObserver()
self.secureTextEntryObserver = self.observe(\.isSecureTextEntry, options: [.old, .new]) { [weak self] _, change in
guard let strongSelf = self, strongSelf.isPasswordToggleEnabled else { return }
if let oldValue = change.oldValue, let newValue = change.newValue,
!oldValue && newValue {
strongSelf.isChangingSecureTextEntry = true
DispatchQueue.main.async {
strongSelf.isChangingSecureTextEntry = false
}
}
}
}
/// 移除isSecureTextEntry的KVO监听
private func removeSecureTextEntryObserver() {
self.secureTextEntryObserver?.invalidate()
self.secureTextEntryObserver = nil
}
/// 设置密码切换按钮
private func setupPasswordToggle() {
let toggleButton = UIButton(type: .custom)
toggleButton.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
let showIcon = self.showPasswordIcon ?? UIImage(systemName: "eye")
let hideIcon = self.hidePasswordIcon ?? UIImage(systemName: "eye.slash")
toggleButton.setImage(showIcon, for: .normal)
toggleButton.setImage(hideIcon, for: .selected)
toggleButton.tintColor = UIColor.systemGray
toggleButton.addTarget(self, action: #selector(st_passwordToggleButtonTapped), for: .touchUpInside)
toggleButton.isUserInteractionEnabled = true
toggleButton.isEnabled = true
let containerWidth: CGFloat = 44
let containerHeight: CGFloat = self.bounds.height > 0 ? self.bounds.height : 44
let container = UIView(frame: CGRect(x: 0, y: 0, width: containerWidth, height: containerHeight))
toggleButton.center = CGPoint(x: container.bounds.midX, y: container.bounds.midY)
container.addSubview(toggleButton)
container.isUserInteractionEnabled = true
self.semanticContentAttribute = .forceLeftToRight
container.semanticContentAttribute = .forceLeftToRight
toggleButton.semanticContentAttribute = .forceLeftToRight
self.passwordToggleButton = toggleButton
self.rightView = container
self.rightViewMode = .always
}
/// 密码切换按钮点击事件
@objc private func st_passwordToggleButtonTapped() {
guard let button = self.passwordToggleButton else { return }
self.savaText = self.text ?? ""
self.isChangingSecureTextEntry = true
self.isSecureTextEntry.toggle()
button.isSelected = !self.isSecureTextEntry
// 延迟重置标志，确保文本变化事件能正确处理
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
self.isChangingSecureTextEntry = false
}
}
@objc private func st_textFieldEditingChanged(textField: STTextField) {
if self.isPasswordToggleEnabled {
// 只有在切换密码可见性时才恢复保存的文本，用户正常删除操作不应该恢复
if self.isChangingSecureTextEntry {
if (textField.text?.isEmpty ?? true) && !self.savaText.isEmpty {
textField.text = self.savaText
return
}
}
// 更新保存的文本
self.savaText = textField.text ?? ""
}
self.enforceTextCountIfNeeded(for: textField)
self.cusDelegate?.st_textFieldEditingChanged(textField: textField)
}
private func enforceTextCountIfNeeded(for textField: STTextField) {
guard self.maxTextCount > 0 else { return }
if textField.markedTextRange != nil {
return
}
guard let inputText = textField.text, inputText.count > self.maxTextCount else { return }
textField.text = String(inputText.prefix(self.maxTextCount))
}
private func updateLiquidGlassBackground() {
guard self.isLiquidGlassEnabled else { return }
self.st_enableLiquidGlassBackground(
tintColor: self.liquidGlassTintColor,
highlightOpacity: self.liquidGlassHighlightOpacity,
borderColor: self.liquidGlassBorderColor
)
}
}
// MARK: - STLocalizable
extension STTextField: STLocalizable {
public func st_updateLocalizedText() {
let key = self.localizedPlaceholder
if !key.isEmpty {
self.placeholder = key.localized
}
}
}