👍 implement scan logic

.gitignore

@@ -0,0 +1,126 @@
+receipt_images
+### Generated by gibo (https://github.com/simonwhitaker/gibo)
+### https://raw.github.com/github/gitignore/b0012e4930d0a8c350254a3caeedf7441ea286a3/Swift.gitignore
+
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## User settings
+xcuserdata/
+
+## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9)
+*.xcscmblueprint
+*.xccheckout
+
+## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4)
+build/
+DerivedData/
+*.moved-aside
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+
+## Obj-C/Swift specific
+*.hmap
+
+## App packaging
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+#
+# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
+# Packages/
+# Package.pins
+# Package.resolved
+# *.xcodeproj
+#
+# Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata
+# hence it is not needed unless you have added a package configuration file to your project
+# .swiftpm
+
+.build/
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# Pods/
+#
+# Add this line if you want to avoid checking in source code from the Xcode workspace
+# *.xcworkspace
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build/
+
+# Accio dependency management
+Dependencies/
+.accio/
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo.
+# Instead, use fastlane to re-generate the screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/#source-control
+
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/**/*.png
+fastlane/test_output
+
+# Code Injection
+#
+# After new code Injection tools there's a generated folder /iOSInjectionProject
+# https://github.com/johnno1962/injectionforxcode
+
+iOSInjectionProject/
+
+
+### https://raw.github.com/github/gitignore/b0012e4930d0a8c350254a3caeedf7441ea286a3/Global/Xcode.gitignore
+
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## User settings
+xcuserdata/
+
+## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9)
+*.xcscmblueprint
+*.xccheckout
+
+## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4)
+build/
+DerivedData/
+*.moved-aside
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+
+## Gcc Patch
+/*.gcno
+
+

VisionReceipt/ScannerView.swift

@@ -8,12 +8,14 @@
 
 import SwiftUI
 import PhotosUI
+import Vision
 
 struct ScannerView: View {
     @State private var pickerItems: [PhotosPickerItem] = []
     @State private var uiImage: UIImage?
     @State private var isPresented: Bool = false
-    @State private var loading: Bool = false
+    @State private var imageLoading: Bool = false
+    @State private var processLoading: Bool = false
 
     var body: some View {
         VStack(spacing: 24) {
@@ -22,7 +24,7 @@ struct ScannerView: View {
                     .resizable()
                     .scaledToFit()
                     .frame(maxHeight: 300)
-            } else if loading {
+            } else if imageLoading {
                 ProgressView()
                     .progressViewStyle(.circular)
             } else {
@@ -37,11 +39,18 @@ struct ScannerView: View {
                     Image(systemName: "photo.fill")
                         .font(.title)
                 })
+                .disabled(processLoading)
                 Button(action: {
-                    print("proceed vision detect")
+                    processLoading = true
+                    executeTextRecognizer()
                 }, label: {
-                    Image(systemName: "brain")
-                        .font(.title)
+                    if processLoading {
+                        ProgressView()
+                            .progressViewStyle(.circular)
+                    } else {
+                        Image(systemName: "brain")
+                            .font(.title)
+                    }
                 })
                 .disabled(uiImage == nil)
             }
@@ -56,11 +65,11 @@ struct ScannerView: View {
         )
         .onChange(of: pickerItems) { newValue in
             if let value = newValue.first {
-                loading = true
+                imageLoading = true
                 Task {
                    try await loadTransferable(from: value)
                     await MainActor.run {
-                        loading = false
+                        imageLoading = false
                     }
                 }
             }
@@ -85,6 +94,39 @@ struct ScannerView: View {
             print("\(#function) | error: \(error)")
         }
     }
+
+    /// 文字認識を走らせる
+    /// ref: https://developer.apple.com/documentation/vision/recognizing_text_in_images/
+    private func executeTextRecognizer() {
+        guard let cgImage = uiImage?.cgImage else {
+            processLoading = false
+            return
+        }
+        let requestHandler = VNImageRequestHandler(cgImage: cgImage)
+        let request = VNRecognizeTextRequest(completionHandler: recognizeTextHandler)
+        request.revision = VNRecognizeTextRequestRevision3
+        request.recognitionLanguages = ["ja", "en"]
+        do {
+            try requestHandler.perform([request])
+        } catch {
+            processLoading = false
+            print("Unable to perform the requests: \(error)")
+        }
+    }
+
+    private func recognizeTextHandler(request: VNRequest, error: Error?) {
+        guard let observations = request.results as? [VNRecognizedTextObservation] else {
+            processLoading = false
+            return
+        }
+        print("observations: \(observations)")
+        let recognizedStrings = observations.compactMap { observation in
+            return observation.topCandidates(1).first?.string
+        }
+
+        processLoading = false
+        print("result \(recognizedStrings)")
+    }
 }
 
 #if DEBUG