QRCodeSwiftUIExample

Code

import SwiftUI
import SwiftQRCodeScanner
struct ContentView: View {
 @State private var isPresented = false
 @State private var showExtraOptions = false
 @State private var scannedValue: String = ""
 @State private var textColor: Color = .black
 @State private var result: Result<String, QRCodeError>?
 
 var body: some View {
 VStack(spacing: 30) {
 Text(scannedValue)
 .foregroundColor(textColor)
 Button("Scan QR Code") {
 self.isPresented = true
 }
 Button("Scan QR Code with Extra Options") {
 self.showExtraOptions = true
 self.isPresented = true
 }
 }
 .sheet(isPresented: $isPresented) {
 QRScanner(showExtraOptions: $showExtraOptions, result: self.$result)
 }
 .onChange(of: result) { newValue in
 guard let unwrappedResult = newValue else { return }
 switch unwrappedResult {
 case .success(let qrCodeString):
 self.scannedValue = qrCodeString
 self.textColor = .black
 case .failure(let qrCodeError):
 self.scannedValue = qrCodeError.localizedDescription
 self.textColor = .red
 }
 }
 }
}

import UIKit
import SwiftUI
import SwiftQRCodeScanner
struct QRScanner: UIViewControllerRepresentable {
 @Binding var showExtraOptions: Bool
 @Binding var result: Result<String, QRCodeError>?
 @Environment(\.presentationMode) var presentationMode
 
 func makeCoordinator() -> QRScanner.Coordinator {
 return Coordinator(self)
 }
 
 func makeUIViewController(context: Context) -> QRCodeScannerController {
 var picker: QRCodeScannerController?
 if showExtraOptions {
 var configuration = QRScannerConfiguration()
 configuration.cameraImage = UIImage(named: "switch-camera-button")
 configuration.flashOnImage = UIImage(named: "flash")
 configuration.galleryImage = UIImage(named: "photos")
 picker = QRCodeScannerController(qrScannerConfiguration: configuration)
 } else {
 picker = QRCodeScannerController()
 }
 picker!.delegate = context.coordinator
 return picker!
 }
 
 func updateUIViewController(_ uiViewController: QRCodeScannerController, context: Context) {}
}
extension QRScanner {
 class Coordinator: NSObject, QRScannerCodeDelegate {
 @Environment(\.presentationMode) var presentationMode
 var parent: QRScanner
 
 init(_ parent: QRScanner) {
 self.parent = parent
 }
 
 func qrScanner(_ controller: UIViewController, didScanQRCodeWithResult result: String) {
 parent.result = .success(result)
 parent.presentationMode.wrappedValue.dismiss()
 }
 
 func qrScanner(_ controller: UIViewController, 
 didFailWithError error: SwiftQRCodeScanner.QRCodeError) {
 parent.result = .failure(error)
 parent.presentationMode.wrappedValue.dismiss()
 }
 
 func qrScannerDidCancel(_ controller: UIViewController) {
 print("QR Controller did cancel")
 }
 }
}