Add a SwiftUI wrapper for PhoneNumberTextField

README.md

@@ -43,6 +43,29 @@ CountryCodePicker.commonCountryCodes = ["US", "GB", "FR"]
 textField.withDefaultPickerUIOptions.backgroundColor = .systemBackground
 ```
 
+### SwiftUI
+
+Use `PhoneNumberTextFieldRepresentable` to bind a text field to SwiftUI state. Configure the
+underlying `PhoneNumberTextField` in the trailing closure:
+
+```swift
+import SwiftUI
+import PhoneNumberKitUI
+
+struct ContentView: View {
+    @State private var phoneNumber = ""
+
+    var body: some View {
+        PhoneNumberTextFieldRepresentable(text: $phoneNumber) { textField in
+            textField.withFlag = true
+            textField.withPrefix = true
+            textField.withExamplePlaceholder = true
+            textField.withDefaultPickerUI = true
+        }
+    }
+}
+```
+
 Override the default region by subclassing:
 
 ```swift

Sources/PhoneNumberKitUI/PhoneNumberTextFieldRepresentable.swift

@@ -0,0 +1,55 @@
+import SwiftUI
+
+/// A SwiftUI wrapper around ``PhoneNumberTextField``.
+public struct PhoneNumberTextFieldRepresentable: UIViewRepresentable {
+    @Binding private var text: String
+    private let configure: (PhoneNumberTextField) -> Void
+
+    /// Creates a phone number text field bound to a string.
+    ///
+    /// - Parameters:
+    ///   - text: The text displayed and edited by the text field.
+    ///   - configure: A closure for configuring the underlying UIKit text field.
+    public init(
+        text: Binding<String>,
+        configure: @escaping (PhoneNumberTextField) -> Void = { _ in }
+    ) {
+        _text = text
+        self.configure = configure
+    }
+
+    public func makeUIView(context: Context) -> PhoneNumberTextField {
+        let textField = PhoneNumberTextField()
+        configure(textField)
+        textField.addTarget(
+            context.coordinator,
+            action: #selector(Coordinator.textDidChange(_:)),
+            for: .editingChanged
+        )
+        return textField
+    }
+
+    public func updateUIView(_ textField: PhoneNumberTextField, context: Context) {
+        context.coordinator.parent = self
+
+        if textField.text != text {
+            textField.text = text
+        }
+    }
+
+    public func makeCoordinator() -> Coordinator {
+        Coordinator(parent: self)
+    }
+
+    public final class Coordinator: NSObject {
+        fileprivate var parent: PhoneNumberTextFieldRepresentable
+
+        fileprivate init(parent: PhoneNumberTextFieldRepresentable) {
+            self.parent = parent
+        }
+
+        @objc fileprivate func textDidChange(_ textField: PhoneNumberTextField) {
+            parent.text = textField.text ?? ""
+        }
+    }
+}