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+import SwiftUI
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+import UIKit
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+
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+public struct TextFieldWithToolBar: UIViewRepresentable {
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+ @Binding var text: Decimal
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+ var placeholder: String
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+ var textColor: UIColor
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+ var textAlignment: NSTextAlignment
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+ var keyboardType: UIKeyboardType
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+ var autocapitalizationType: UITextAutocapitalizationType
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+ var autocorrectionType: UITextAutocorrectionType
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+ var shouldBecomeFirstResponder: Bool
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+ var maxLength: Int?
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+ var isDismissible: Bool
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+ var textFieldDidBeginEditing: (() -> Void)?
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+ var numberFormatter: NumberFormatter
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+ var allowDecimalSeparator: Bool
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+
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+ public init(
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+ text: Binding<Decimal>,
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+ placeholder: String,
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+ textColor: UIColor = .label,
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+ textAlignment: NSTextAlignment = .right,
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+ keyboardType: UIKeyboardType = .decimalPad,
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+ autocapitalizationType: UITextAutocapitalizationType = .none,
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+ autocorrectionType: UITextAutocorrectionType = .no,
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+ shouldBecomeFirstResponder: Bool = false,
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+ maxLength: Int? = nil,
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+ isDismissible: Bool = true,
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+ textFieldDidBeginEditing: (() -> Void)? = nil,
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+ numberFormatter: NumberFormatter,
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+ allowDecimalSeparator: Bool = true
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+ ) {
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+ _text = text
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+ self.placeholder = placeholder
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+ self.textColor = textColor
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+ self.textAlignment = textAlignment
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+ self.keyboardType = keyboardType
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+ self.autocapitalizationType = autocapitalizationType
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+ self.autocorrectionType = autocorrectionType
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+ self.shouldBecomeFirstResponder = shouldBecomeFirstResponder
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+ self.maxLength = maxLength
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+ self.isDismissible = isDismissible
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+ self.textFieldDidBeginEditing = textFieldDidBeginEditing
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+ self.numberFormatter = numberFormatter
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+ self.numberFormatter.numberStyle = .decimal
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+ self.allowDecimalSeparator = allowDecimalSeparator
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+ }
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+
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+ public func makeUIView(context: Context) -> UITextField {
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+ let textField = UITextField()
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+ context.coordinator.textField = textField
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+ textField.inputAccessoryView = isDismissible ? makeDoneToolbar(for: textField, context: context) : nil
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+ textField.addTarget(context.coordinator, action: #selector(Coordinator.editingDidBegin), for: .editingDidBegin)
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+ textField.delegate = context.coordinator
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+ if text == 0 { /// show no value initially, i.e. empty String
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+ textField.text = ""
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+ } else {
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+ textField.text = numberFormatter.string(for: text)
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+ }
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+ textField.placeholder = placeholder
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+ return textField
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+ }
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+
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+ private func makeDoneToolbar(for textField: UITextField, context: Context) -> UIToolbar {
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+ let toolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
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+ let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
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+ let doneButton = UIBarButtonItem(
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+ image: UIImage(systemName: "keyboard.chevron.compact.down"),
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+ style: .done,
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+ target: textField,
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+ action: #selector(UITextField.resignFirstResponder)
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+ )
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+ let clearButton = UIBarButtonItem(
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+ image: UIImage(systemName: "trash"),
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+ style: .plain,
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+ target: context.coordinator,
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+ action: #selector(Coordinator.clearText)
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+ )
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+
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+ toolbar.items = [clearButton, flexibleSpace, doneButton]
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+ toolbar.sizeToFit()
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+ return toolbar
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+ }
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+
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+ public func updateUIView(_ textField: UITextField, context: Context) {
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+ if text != 0 {
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+ let newText = numberFormatter.string(for: text) ?? ""
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+ if textField.text != newText {
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+ textField.text = newText
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+ }
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+ }
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+
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+ textField.textColor = textColor
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+ textField.textAlignment = textAlignment
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+ textField.keyboardType = keyboardType
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+ textField.autocapitalizationType = autocapitalizationType
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+ textField.autocorrectionType = autocorrectionType
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+
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+ if shouldBecomeFirstResponder, !context.coordinator.didBecomeFirstResponder {
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+ if textField.window != nil, textField.becomeFirstResponder() {
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+ context.coordinator.didBecomeFirstResponder = true
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+ }
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+ } else if !shouldBecomeFirstResponder, context.coordinator.didBecomeFirstResponder {
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+ context.coordinator.didBecomeFirstResponder = false
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+ }
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+ }
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+
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+ public func makeCoordinator() -> Coordinator {
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+ Coordinator(self, maxLength: maxLength)
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+ }
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+
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+ public final class Coordinator: NSObject {
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+ var parent: TextFieldWithToolBar
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+ var textField: UITextField?
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+ let maxLength: Int?
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+ var didBecomeFirstResponder = false
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+ let decimalFormatter: NumberFormatter
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+
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+ init(_ parent: TextFieldWithToolBar, maxLength: Int?) {
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+ self.parent = parent
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+ self.maxLength = maxLength
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+ decimalFormatter = NumberFormatter()
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+ decimalFormatter.locale = Locale.current
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+ decimalFormatter.numberStyle = .decimal
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+ }
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+
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+ @objc fileprivate func clearText() {
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+ parent.text = 0
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+ textField?.text = ""
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+ }
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+
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+ @objc fileprivate func editingDidBegin(_ textField: UITextField) {
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+ DispatchQueue.main.async {
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+ textField.moveCursorToEnd()
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+ }
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+ }
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+ }
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+}
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+
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+extension TextFieldWithToolBar.Coordinator: UITextFieldDelegate {
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+ public func textField(
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+ _ textField: UITextField,
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+ shouldChangeCharactersIn range: NSRange,
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+ replacementString string: String
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+ ) -> Bool {
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+ // Check if the input is a number or the decimal separator
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+ let isNumber = CharacterSet.decimalDigits.isSuperset(of: CharacterSet(charactersIn: string))
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+ let isDecimalSeparator = (string == decimalFormatter.decimalSeparator && textField.text?.contains(string) == false)
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+
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+ // Only proceed if the input is a valid number or decimal separator
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+ if isNumber || isDecimalSeparator && parent.allowDecimalSeparator,
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+ let currentText = textField.text as NSString?
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+ {
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+ // Get the proposed new text
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+ let proposedText = currentText.replacingCharacters(in: range, with: string)
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+
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+ // Try to convert proposed text to number
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+ let number = parent.numberFormatter.number(from: proposedText) ?? decimalFormatter.number(from: proposedText)
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+
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+ // Update the binding value if conversion is successful
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+ if let number = number {
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+ parent.text = number.decimalValue
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+ } else {
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+ parent.text = 0
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+ }
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+ }
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+
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+ // Allow the change if it's a valid number or decimal separator
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+ return isNumber || isDecimalSeparator && parent.allowDecimalSeparator
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+ }
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+
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+ public func textFieldDidBeginEditing(_: UITextField) {
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+ parent.textFieldDidBeginEditing?()
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+ }
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+}
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+
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+extension UITextField {
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+ func moveCursorToEnd() {
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+ dispatchPrecondition(condition: .onQueue(.main))
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+ let newPosition = endOfDocument
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+ selectedTextRange = textRange(from: newPosition, to: newPosition)
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+ }
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+}
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+
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+extension UIApplication {
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+ func endEditing() {
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+ sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
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+ }
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+}
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+
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+public struct TextFieldWithToolBarString: UIViewRepresentable {
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+ @Binding var text: String
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+ var placeholder: String
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+ var textAlignment: NSTextAlignment = .right
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+ var keyboardType: UIKeyboardType = .default
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+ var autocapitalizationType: UITextAutocapitalizationType = .none
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+ var autocorrectionType: UITextAutocorrectionType = .no
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+ var shouldBecomeFirstResponder: Bool = false
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+ var maxLength: Int? = nil
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+ var isDismissible: Bool = true
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+
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+ public func makeUIView(context: Context) -> UITextField {
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+ let textField = UITextField()
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+ context.coordinator.textField = textField
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+ textField.inputAccessoryView = isDismissible ? makeDoneToolbar(for: textField, context: context) : nil
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+ textField.addTarget(context.coordinator, action: #selector(Coordinator.editingDidBegin), for: .editingDidBegin)
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+ textField.delegate = context.coordinator
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+ textField.text = text
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+ textField.placeholder = placeholder
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+ textField.textAlignment = textAlignment
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+ textField.keyboardType = keyboardType
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+ textField.autocapitalizationType = autocapitalizationType
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+ textField.autocorrectionType = autocorrectionType
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+ textField.adjustsFontSizeToFitWidth = true
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+ return textField
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+ }
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+
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+ private func makeDoneToolbar(for textField: UITextField, context: Context) -> UIToolbar {
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+ let toolbar = UIToolbar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 50))
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+ let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
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+ let doneButton = UIBarButtonItem(
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+ image: UIImage(systemName: "keyboard.chevron.compact.down"),
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+ style: .done,
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+ target: textField,
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+ action: #selector(UITextField.resignFirstResponder)
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+ )
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+ let clearButton = UIBarButtonItem(
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+ image: UIImage(systemName: "trash"),
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+ style: .plain,
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+ target: context.coordinator,
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+ action: #selector(Coordinator.clearText)
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+ )
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+
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+ toolbar.items = [clearButton, flexibleSpace, doneButton]
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+ toolbar.sizeToFit()
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+ return toolbar
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+ }
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+
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+ public func updateUIView(_ textField: UITextField, context: Context) {
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+ if textField.text != text {
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+ textField.text = text
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+ }
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+
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+ textField.textAlignment = textAlignment
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+ textField.keyboardType = keyboardType
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+ textField.autocapitalizationType = autocapitalizationType
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+ textField.autocorrectionType = autocorrectionType
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+
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+ if shouldBecomeFirstResponder, !context.coordinator.didBecomeFirstResponder {
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+ if textField.window != nil, textField.becomeFirstResponder() {
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+ context.coordinator.didBecomeFirstResponder = true
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+ }
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+ } else if !shouldBecomeFirstResponder, context.coordinator.didBecomeFirstResponder {
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+ context.coordinator.didBecomeFirstResponder = false
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+ }
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+ }
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+
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+ public func makeCoordinator() -> Coordinator {
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+ Coordinator(self, maxLength: maxLength)
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+ }
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+
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+ public final class Coordinator: NSObject {
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+ var parent: TextFieldWithToolBarString
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+ var textField: UITextField?
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+ let maxLength: Int?
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+ var didBecomeFirstResponder = false
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+
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+ init(_ parent: TextFieldWithToolBarString, maxLength: Int?) {
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+ self.parent = parent
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+ self.maxLength = maxLength
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+ }
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+
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+ @objc fileprivate func clearText() {
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+ parent.text = ""
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+ textField?.text = ""
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+ }
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+
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+ @objc fileprivate func editingDidBegin(_ textField: UITextField) {
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+ DispatchQueue.main.async {
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+ textField.moveCursorToEnd()
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+ }
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+ }
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+ }
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+}
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+
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+extension TextFieldWithToolBarString.Coordinator: UITextFieldDelegate {
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+ public func textField(
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+ _ textField: UITextField,
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+ shouldChangeCharactersIn range: NSRange,
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+ replacementString string: String
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+ ) -> Bool {
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+ if let maxLength = parent.maxLength {
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+ // Get the current text, including the proposed change
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+ let currentText = textField.text ?? ""
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+ let newLength = currentText.count + string.count - range.length
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+ if newLength > maxLength {
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+ return false
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+ }
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+ }
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+
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+ DispatchQueue.main.async {
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+ if let textFieldText = textField.text as NSString? {
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+ let newText = textFieldText.replacingCharacters(in: range, with: string)
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+ self.parent.text = newText
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+ }
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+ }
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+
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+ return true
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+ }
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+}
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Sjoerd Bozon