Merge pull request #131 from qalandarov/main

Ability to pause scanning (i.e. when presenting)

Author: nathanfallet

Sources/CodeScanner/CodeScanner.swift

@@ -85,6 +85,7 @@ public struct CodeScannerView: UIViewControllerRepresentable {
     public var simulatedData = ""
     public var shouldVibrateOnSuccess: Bool
     public var isTorchOn: Bool
+    public var isPaused: Bool
     public var isGalleryPresented: Binding<Bool>
     public var videoCaptureDevice: AVCaptureDevice?
     public var completion: (Result<ScanResult, ScanError>) -> Void
@@ -99,6 +100,7 @@ public struct CodeScannerView: UIViewControllerRepresentable {
         simulatedData: String = "",
         shouldVibrateOnSuccess: Bool = true,
         isTorchOn: Bool = false,
+        isPaused: Bool = false,
         isGalleryPresented: Binding<Bool> = .constant(false),
         videoCaptureDevice: AVCaptureDevice? = AVCaptureDevice.bestForVideo,
         completion: @escaping (Result<ScanResult, ScanError>) -> Void
@@ -112,6 +114,7 @@ public struct CodeScannerView: UIViewControllerRepresentable {
         self.simulatedData = simulatedData
         self.shouldVibrateOnSuccess = shouldVibrateOnSuccess
         self.isTorchOn = isTorchOn
+        self.isPaused = isPaused
         self.isGalleryPresented = isGalleryPresented
         self.videoCaptureDevice = videoCaptureDevice
         self.completion = completion

Sources/CodeScanner/ScannerViewController.swift

@@ -12,7 +12,7 @@ import UIKit
 @available(macCatalyst 14.0, *)
 extension CodeScannerView {
 
-    public class ScannerViewController: UIViewController, UINavigationControllerDelegate {
+    public final class ScannerViewController: UIViewController, UINavigationControllerDelegate {
         private let photoOutput = AVCapturePhotoOutput()
         private var isCapturing = false
         private var handler: ((UIImage?) -> Void)?
@@ -174,7 +174,7 @@ extension CodeScannerView {
         }
 
         private func setupSession() {
-            guard let captureSession = captureSession else {
+            guard let captureSession else {
                 return
             }
 
@@ -436,9 +436,12 @@ extension CodeScannerView {
 extension CodeScannerView.ScannerViewController: AVCaptureMetadataOutputObjectsDelegate {
     public func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
         if let metadataObject = metadataObjects.first {
-            guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
-            guard let stringValue = readableObject.stringValue else { return }
-            guard !didFinishScanning && !isCapturing else { return }
+            guard !parentView.isPaused && !didFinishScanning && !isCapturing,
+                  let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject,
+                  let stringValue = readableObject.stringValue
+            else {
+                return
+            }
 
             handler = { [self] image in
                 let result = ScanResult(string: stringValue, type: readableObject.type, image: image, corners: readableObject.corners)