Added the document camera controller and very basic mockup of the view

.gitignore

@@ -0,0 +1 @@
+Build/

JustScanIt.xcodeproj/project.pbxproj

@@ -11,6 +11,7 @@
 		466989C92C34DC7A009884D1 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 466989C82C34DC7A009884D1 /* ContentView.swift */; };
 		466989CB2C34DC7B009884D1 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 466989CA2C34DC7B009884D1 /* Assets.xcassets */; };
 		466989CE2C34DC7B009884D1 /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 466989CD2C34DC7B009884D1 /* Preview Assets.xcassets */; };
+		466989D62C34DCE4009884D1 /* VNDocumentCameraViewControllerR.swift in Sources */ = {isa = PBXBuildFile; fileRef = 466989D52C34DCE4009884D1 /* VNDocumentCameraViewControllerR.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -19,6 +20,7 @@
 		466989C82C34DC7A009884D1 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
 		466989CA2C34DC7B009884D1 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		466989CD2C34DC7B009884D1 /* Preview Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = "Preview Assets.xcassets"; sourceTree = "<group>"; };
+		466989D52C34DCE4009884D1 /* VNDocumentCameraViewControllerR.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VNDocumentCameraViewControllerR.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -51,6 +53,7 @@
 		466989C52C34DC7A009884D1 /* JustScanIt */ = {
 			isa = PBXGroup;
 			children = (
+				466989D42C34DCB9009884D1 /* Controllers */,
 				466989C62C34DC7A009884D1 /* JustScanItApp.swift */,
 				466989C82C34DC7A009884D1 /* ContentView.swift */,
 				466989CA2C34DC7B009884D1 /* Assets.xcassets */,
@@ -67,6 +70,14 @@
 			path = "Preview Content";
 			sourceTree = "<group>";
 		};
+		466989D42C34DCB9009884D1 /* Controllers */ = {
+			isa = PBXGroup;
+			children = (
+				466989D52C34DCE4009884D1 /* VNDocumentCameraViewControllerR.swift */,
+			);
+			path = Controllers;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -139,6 +150,7 @@
 			files = (
 				466989C92C34DC7A009884D1 /* ContentView.swift in Sources */,
 				466989C72C34DC7A009884D1 /* JustScanItApp.swift in Sources */,
+				466989D62C34DCE4009884D1 /* VNDocumentCameraViewControllerR.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -275,11 +287,14 @@
 				DEVELOPMENT_TEAM = 9MP5435PRF;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "Just Scan It";
+				INFOPLIST_KEY_NSCameraUsageDescription = "Scan documents with the camera.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown";
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -287,9 +302,13 @@
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = xyz.breadone.JustScanIt;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
+				TARGETED_DEVICE_FAMILY = 1;
 			};
 			name = Debug;
 		};
@@ -304,11 +323,14 @@
 				DEVELOPMENT_TEAM = 9MP5435PRF;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_KEY_CFBundleDisplayName = "Just Scan It";
+				INFOPLIST_KEY_NSCameraUsageDescription = "Scan documents with the camera.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
 				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
 				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown";
+				IPHONEOS_DEPLOYMENT_TARGET = 17.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -316,9 +338,13 @@
 				MARKETING_VERSION = 1.0;
 				PRODUCT_BUNDLE_IDENTIFIER = xyz.breadone.JustScanIt;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SUPPORTED_PLATFORMS = "iphoneos iphonesimulator";
+				SUPPORTS_MACCATALYST = NO;
+				SUPPORTS_MAC_DESIGNED_FOR_IPHONE_IPAD = NO;
+				SUPPORTS_XR_DESIGNED_FOR_IPHONE_IPAD = NO;
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
+				TARGETED_DEVICE_FAMILY = 1;
 			};
 			name = Release;
 		};

JustScanIt/ContentView.swift

@@ -6,18 +6,64 @@
 //
 
 import SwiftUI
+import AVKit
 
 struct ContentView: View {
-    var body: some View {
+    @State private var scannedImages: [UIImage] = []
-        VStack {
+    @State private var isShowingVNDocumentCameraView = false
-            Image(systemName: "globe")
+    
-                .imageScale(.large)
+    var isAuthorized: Bool {
-                .foregroundStyle(.tint)
+        get async {
-            Text("Hello, world!")
+            let status = AVCaptureDevice.authorizationStatus(for: .video)
+            
+            // Determine if the user previously authorized camera access.
+            var isAuthorized = status == .authorized
+            
+            // If the system hasn't determined the user's authorization status,
+            // explicitly prompt them for approval.
+            if status == .notDetermined {
+                isAuthorized = await AVCaptureDevice.requestAccess(for: .video)
             }
+            
+            return isAuthorized
+        }
+    }
+    
+    var body: some View {
+        NavigationView {
+            Grid {
+                ForEach(scannedImages, id: \.self) { image in
+                    VStack {
+                        Image(uiImage: image)
+                            .resizable()
+                            .scaledToFit()
+                            .frame(width: 100, height: 100)
                             .padding()
                     }
                 }
+            }
+            .navigationTitle("Just Scan It!")
+            .sheet(isPresented: $isShowingVNDocumentCameraView) {
+                VNDocumentCameraViewControllerRepresentable(scanResult: $scannedImages)
+            }
+            .toolbar {
+                ToolbarItem {
+                    Button(action: showVNDocumentCameraView) {
+                        Image(systemName: "scanner")
+                    }
+                }
+            }
+        }
+    }
+    
+    private func showVNDocumentCameraView() {
+        Task {
+            guard await isAuthorized else { return }
+        }
+        
+        isShowingVNDocumentCameraView = true
+    }
+}
 
 #Preview {
     ContentView()

JustScanIt/Controllers/VNDocumentCameraViewControllerR.swift

@@ -0,0 +1,51 @@
+//
+//  VNDocumentCameraViewControllerR.swift
+//  JustScanIt
+//
+//  Created by Pradyun Setti on 03/07/2024.
+//
+
+import SwiftUI
+import VisionKit
+
+struct VNDocumentCameraViewControllerRepresentable: UIViewControllerRepresentable {
+    @Binding var scanResult: [UIImage]
+    
+    func makeUIViewController(context: Context) -> VNDocumentCameraViewController {
+        let documentCameraViewController = VNDocumentCameraViewController()
+        documentCameraViewController.delegate = context.coordinator
+        
+        return documentCameraViewController
+    }
+    
+    func updateUIViewController(_ uiViewController: VNDocumentCameraViewController, context: Context) { }
+    
+    func makeCoordinator() -> Coordinator {
+        Coordinator(scanResult: $scanResult)
+    }
+    
+    final class Coordinator: NSObject, VNDocumentCameraViewControllerDelegate {
+        @Binding var scanResult: [UIImage]
+        
+        init(scanResult: Binding<[UIImage]>) {
+            _scanResult = scanResult
+        }
+        
+        /// Tells the delegate that the user successfully saved a scanned document from the document camera.
+        func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFinishWith scan: VNDocumentCameraScan) {
+            controller.dismiss(animated: true, completion: nil)
+            scanResult = (0..<scan.pageCount).compactMap { scan.imageOfPage(at: $0) }
+        }
+        
+        // Tells the delegate that the user canceled out of the document scanner camera.
+        func documentCameraViewControllerDidCancel(_ controller: VNDocumentCameraViewController) {
+            controller.dismiss(animated: true, completion: nil)
+        }
+        
+        /// Tells the delegate that document scanning failed while the camera view controller was active.
+        func documentCameraViewController(_ controller: VNDocumentCameraViewController, didFailWithError error: Error) {
+            print("Document scanner error: \(error.localizedDescription)")
+            controller.dismiss(animated: true, completion: nil)
+        }
+    }
+}