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<key>NSCameraUsageDescription</key> <string>写真を撮影します。</string>

import SwiftUI struct ContentView: View { @State var showingPicker = false @State var image: UIImage? var body: some View { VStack { if let image = image { Image(uiImage: image) .resizable() .aspectRatio(contentMode: .fit) } Text("Image") .onTapGesture { showingPicker.toggle() } } .sheet(isPresented: $showingPicker) { ImagePickerView(image: $image, sourceType: .camera) //ImagePickerView(image: $image, sourceType: .camera, allowsEditing: true) //ImagePickerView(image: $image, sourceType: .library) } } } #Preview { ContentView() }

import SwiftUI struct ImagePickerView: UIViewControllerRepresentable { typealias UIViewControllerType = UIImagePickerController @Environment(\.presentationMode) var presentationMode @Binding var image: UIImage? enum SourceType { case camera case library } var sourceType: SourceType var allowsEditing: Bool = false class Coordinator: NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate { let parent: ImagePickerView init(_ parent: ImagePickerView) { self.parent = parent } func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]) { if let image = info[.editedImage] as? UIImage { parent.image = image } else if let image = info[.originalImage] as? UIImage { parent.image = image } parent.presentationMode.wrappedValue.dismiss() } } func makeCoordinator() -> Coordinator { Coordinator(self) } func makeUIViewController(context: Context) -> UIImagePickerController { let viewController = UIImagePickerController() viewController.delegate = context.coordinator switch sourceType { case .camera: viewController.sourceType = UIImagePickerController.SourceType.camera case .library: viewController.sourceType = UIImagePickerController.SourceType.photoLibrary } viewController.allowsEditing = allowsEditing return viewController } func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) { } }

<key>NSPhotoLibraryAddUsageDescription</key> <string>画像を保存します。</string>

@State var saved: Bool = false var body: some View { VStack { if let image = image { Image(uiImage: image) .resizable() .aspectRatio(contentMode: .fit) Button(action: { // 画像を保存 UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil) // 保存完了アラートを表示 saved = true }) { Text("保存") }.alert(isPresented: $saved, content: { Alert( title: Text("保存"), message: Text("画像が保存されました。") ) }) }

<key>NSCameraUsageDescription</key> <string>写真を撮影します。</string>

import SwiftUI import AVFoundation struct ContentView: View { var body: some View { CameraView() } } // SwiftUIでUIKitのViewを使いたい場合、UIViewRepresentableを継承する struct CameraView: UIViewRepresentable { // 画面が作成されたときに呼ばれる（実装必須） func makeUIView(context: Context) -> UIView { BaseCameraView() } // 画面が更新されたときに呼ばれる（実装必須） func updateUIView(_ uiView: UIViewType, context: Context) {} } class BaseCameraView: UIView { // 利用されるまで初期化されない変数として定義 lazy var initCaptureSession: Void = { var device: AVCaptureDevice? if let availableDevice = AVCaptureDevice.DiscoverySession( deviceTypes: [.builtInWideAngleCamera], mediaType: .video, //position: .front position: .back ).devices.first { device = availableDevice } do { let input = try AVCaptureDeviceInput(device: device!) let session = AVCaptureSession() session.addInput(input) session.startRunning() layer.insertSublayer(AVCaptureVideoPreviewLayer(session: session), at: 0) } catch let error { print(error.localizedDescription) } }() // 画面の制約が更新されると呼ばれる override func layoutSubviews() { super.layoutSubviews() _ = initCaptureSession (layer.sublayers?.first as? AVCaptureVideoPreviewLayer)?.frame = frame } } #Preview { ContentView() }

<key>NSCameraUsageDescription</key> <string>写真を撮影します。</string> <key>NSPhotoLibraryAddUsageDescription</key> <string>写真を保存します。</string>

import Foundation import AVFoundation class VideoCapture: NSObject { let captureSession = AVCaptureSession() var handler: ((CMSampleBuffer) -> Void)? override init() { super.init() setup() } // キャプチャ設定 func setup() { captureSession.beginConfiguration() let device = AVCaptureDevice.default(.builtInWideAngleCamera, for: .video, position: .back) guard let deviceInput = try? AVCaptureDeviceInput(device: device!), captureSession.canAddInput(deviceInput) else { return } captureSession.addInput(deviceInput) let videoDataOutput = AVCaptureVideoDataOutput() videoDataOutput.setSampleBufferDelegate(self, queue: DispatchQueue(label: "mydispatchqueue")) videoDataOutput.alwaysDiscardsLateVideoFrames = true guard captureSession.canAddOutput(videoDataOutput) else { return } captureSession.addOutput(videoDataOutput) // アウトプットの画像を縦向きに変更（標準は横） for connection in videoDataOutput.connections { if connection.isVideoOrientationSupported { connection.videoOrientation = .portrait } } captureSession.commitConfiguration() } // キャプチャ開始 func run(_ handler: @escaping (CMSampleBuffer) -> Void) { if !captureSession.isRunning { self.handler = handler captureSession.startRunning() } } // キャプチャ停止 func stop() { if captureSession.isRunning { captureSession.stopRunning() } } } extension VideoCapture: AVCaptureVideoDataOutputSampleBufferDelegate { func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) { if let handler = handler { handler(sampleBuffer) } } }

import SwiftUI import AVFoundation struct ContentView: View { let videoCapture = VideoCapture() @State var image: UIImage? = nil @State var saved: Bool = false var body: some View { VStack { if let image = image { Image(uiImage: image) .resizable() .scaledToFit() } HStack { Button("撮影") { // カメラプレビューを停止 stopCameraPreview() // シャッター音を鳴らす AudioServicesPlaySystemSound(1108) // 画像を保存 UIImageWriteToSavedPhotosAlbum(self.image!, nil, nil, nil) // 保存完了アラートを表示 saved = true }.alert(isPresented: $saved, content: { Alert( title: Text("保存"), message: Text("画像が保存されました。"), dismissButton: .default(Text("OK"), action: { // カメラプレビューを開始 startCameraPreview() }) ) }) } } .onAppear { // カメラプレビューを開始 startCameraPreview() } } // カメラプレビューを開始 func startCameraPreview() { // キャプチャ開始 videoCapture.run { sampleBuffer in if let convertImage = UIImageFromSampleBuffer(sampleBuffer) { DispatchQueue.main.async { self.image = convertImage } } } } // カメラプレビューを停止 func stopCameraPreview() { // キャプチャ停止 videoCapture.stop() } // カメラプレビューからイメージを取得 func UIImageFromSampleBuffer(_ sampleBuffer: CMSampleBuffer) -> UIImage? { if let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) { let ciImage = CIImage(cvPixelBuffer: pixelBuffer) let imageRect = CGRect(x: 0, y: 0, width: CVPixelBufferGetWidth(pixelBuffer), height: CVPixelBufferGetHeight(pixelBuffer)) let context = CIContext() if let image = context.createCGImage(ciImage, from: imageRect) { return UIImage(cgImage: image) } } return nil } } #Preview { ContentView() }