Fix galery boolean for swipe down dismiss

Author: kafejo

Sources/CodeScanner/ScannerViewController.swift

@@ -12,7 +12,7 @@ import UIKit
 @available(macCatalyst 14.0, *)
 extension CodeScannerView {
 
-    public class ScannerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, AVCaptureMetadataOutputObjectsDelegate {
+    public class ScannerViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, AVCaptureMetadataOutputObjectsDelegate, UIAdaptivePresentationControllerDelegate {
         private let photoOutput = AVCapturePhotoOutput()
         private var isCapturing = false
         private var handler: ((UIImage) -> Void)?
@@ -46,6 +46,7 @@ extension CodeScannerView {
             isGalleryShowing = true
             let imagePicker = UIImagePickerController()
             imagePicker.delegate = self
+            imagePicker.presentationController?.delegate = self
             present(imagePicker, animated: true, completion: nil)
         }
 
@@ -86,6 +87,11 @@ extension CodeScannerView {
             dismiss(animated: true, completion: nil)
         }
 
+        public func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
+            // Galery is no longer being presented
+            isGalleryShowing = false
+        }
+
         #if targetEnvironment(simulator)
         override public func loadView() {
             view = UIView()