Add image decoding functionality to ScannerView; implement image picker for QR code detection from photos, enhance overlay with image decode button, and update state management for decoded images, improving user experience.

MyQrCode/ScannerView/ScannerView.swift

@@ -3,6 +3,7 @@ import AVFoundation
 import AudioToolbox
 import Combine
 import CoreData
+import QRCode
 
 // MARK: - 主扫描视图
 struct ScannerView: View {
@@ -14,6 +15,11 @@ struct ScannerView: View {
     @State private var navigateToDetail = false
     @State private var selectedHistoryItem: HistoryItem?
     
+    // 图片解码相关状态
+    @State private var showImagePicker = false
+    @State private var isDecodingImage = false
+    @State private var decodedImageCodes: [DetectedCode] = []
+    
     var body: some View {
         ZStack {
             // 相机权限检查
@@ -26,25 +32,29 @@ struct ScannerView: View {
                 ScanningOverlayView(
                     showPreviewPause: showPreviewPause,
                     selectedStyle: $selectedScanningStyle,
-                    detectedCodesCount: scannerViewModel.detectedCodes.count
+                    detectedCodesCount: scannerViewModel.detectedCodes.count,
+                    onImageDecode: { showImagePicker = true }
                 )
                 
                 // 条码位置标记覆盖层
-                if showPreviewPause && !scannerViewModel.detectedCodes.isEmpty {
+                if showPreviewPause && (!scannerViewModel.detectedCodes.isEmpty || !decodedImageCodes.isEmpty) {
                     CodePositionOverlay(
-                        detectedCodes: scannerViewModel.detectedCodes,
+                        detectedCodes: scannerViewModel.detectedCodes + decodedImageCodes,
                         previewLayer: previewLayer,
                         onCodeSelected: handleCodeSelection
                     )
                 }
                 
                 // 测试按钮（调试用）
-                if showPreviewPause && scannerViewModel.detectedCodes.count == 1 {
+                if showPreviewPause && (scannerViewModel.detectedCodes.count + decodedImageCodes.count) == 1 {
+                    let singleCode = scannerViewModel.detectedCodes.first ?? decodedImageCodes.first
+                    if let code = singleCode {
                         TestAutoSelectButton(
-                        detectedCode: scannerViewModel.detectedCodes[0],
+                            detectedCode: code,
                             onSelect: handleCodeSelection
                         )
                     }
+                }
             } else {
                 // 权限未授权时的UI
                 CameraPermissionView(
@@ -61,6 +71,9 @@ struct ScannerView: View {
         .navigationTitle("扫描器")
         .navigationBarTitleDisplayMode(.inline)
         .navigationBarBackButtonHidden(false)
+        .sheet(isPresented: $showImagePicker) {
+            ImagePicker(onImageSelected: handleImageDecodeResult)
+        }
         .toolbar {
             ToolbarItem(placement: .navigationBarLeading) {
                 // 手电筒按钮 - 只在相机权限已授权时显示
@@ -246,6 +259,9 @@ struct ScannerView: View {
         // 重置扫描状态
         scannerViewModel.resetDetection()
         
+        // 重置图片解码状态
+        resetImageDecodeState()
+        
         // 恢复相机功能并重新开始扫描
         scannerViewModel.resumeCamera()
         
@@ -256,7 +272,8 @@ struct ScannerView: View {
         logInfo("开始自动选择定时器，条码类型: \(code.type)", className: "ScannerView")
         
         DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
-            guard self.showPreviewPause && self.scannerViewModel.detectedCodes.count == 1 else {
+            let totalCodes = self.scannerViewModel.detectedCodes.count + self.decodedImageCodes.count
+            guard self.showPreviewPause && totalCodes == 1 else {
                 logInfo("条件不满足，取消自动选择", className: "ScannerView")
                 return
             }
@@ -265,6 +282,96 @@ struct ScannerView: View {
             self.handleCodeSelection(code)
         }
     }
+    
+    // MARK: - 图片解码相关方法
+    
+    /// 处理图片解码结果
+    private func handleImageDecodeResult(_ image: UIImage) {
+        isDecodingImage = true
+        decodedImageCodes.removeAll()
+        
+        logInfo("🔍 开始解码图片", className: "ScannerView")
+        
+        // 在后台线程进行解码
+        DispatchQueue.global(qos: .userInitiated).async { [self] in
+            
+            // 使用QRCode库检测二维码
+            let detected = QRCode.DetectQRCodes(in: image)
+            if detected.count > 0 {
+                logInfo("✅ 检测到 \(detected.count) 个二维码", className: "ScannerView")
+                
+                let results = detected.enumerated().map { index, qrCode in
+                    DetectedCode(
+                        type: "QR Code",
+                        content: qrCode.messageString ?? "未知内容",
+                        bounds: qrCode.bounds
+                    )
+                }
+                
+                DispatchQueue.main.async {
+                    self.decodedImageCodes = results
+                    self.isDecodingImage = false
+                    self.pauseForPreview()
+                    logInfo("✅ 图片解码完成，共 \(results.count) 个结果", className: "ScannerView")
+                    
+                    // 如果只有一个二维码，自动选择并跳转
+                    if results.count == 1 {
+                        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                            self.handleCodeSelection(results[0])
+                        }
+                    }
+                }
+            } else {
+                DispatchQueue.main.async {
+                    self.isDecodingImage = false
+                    logWarning("❌ 图片中未检测到二维码", className: "ScannerView")
+                }
+            }
+        }
+    }
+    
+    /// 重置图片解码状态
+    private func resetImageDecodeState() {
+        decodedImageCodes.removeAll()
+    }
+}
+
+// MARK: - 图片选择器（兼容iOS 15）
+struct ImagePicker: UIViewControllerRepresentable {
+    let onImageSelected: (UIImage) -> Void
+    
+    func makeUIViewController(context: Context) -> UIImagePickerController {
+        let picker = UIImagePickerController()
+        picker.delegate = context.coordinator
+        picker.sourceType = .photoLibrary
+        picker.allowsEditing = false
+        return picker
+    }
+    
+    func updateUIViewController(_ uiViewController: UIImagePickerController, context: Context) {}
+    
+    func makeCoordinator() -> Coordinator {
+        Coordinator(self)
+    }
+    
+    class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
+        let parent: ImagePicker
+        
+        init(_ parent: ImagePicker) {
+            self.parent = parent
+        }
+        
+        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
+            if let image = info[.originalImage] as? UIImage {
+                parent.onImageSelected(image)
+            }
+            picker.dismiss(animated: true)
+        }
+        
+        func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
+            picker.dismiss(animated: true)
+        }
+    }
 }
 
 #if DEBUG

MyQrCode/ScannerView/ScanningOverlayView.swift

@@ -1,10 +1,12 @@
 import SwiftUI
+import AudioToolbox
 
 // MARK: - 扫描界面覆盖层
 struct ScanningOverlayView: View {
     let showPreviewPause: Bool
     @Binding var selectedStyle: ScanningLineStyle
     let detectedCodesCount: Int
+    let onImageDecode: () -> Void
     
     var body: some View {
         VStack {
@@ -26,7 +28,8 @@ struct ScanningOverlayView: View {
             // 底部按钮区域
             ScanningBottomButtonsView(
                 showPreviewPause: showPreviewPause,
-                selectedStyle: $selectedStyle
+                selectedStyle: $selectedStyle,
+                onImageDecode: onImageDecode
             )
         }
     }
@@ -68,6 +71,7 @@ struct ScanningInstructionView: View {
 struct ScanningBottomButtonsView: View {
     let showPreviewPause: Bool
     @Binding var selectedStyle: ScanningLineStyle
+    let onImageDecode: () -> Void
     
     var body: some View {
         VStack(spacing: 15) {
@@ -76,6 +80,34 @@ struct ScanningBottomButtonsView: View {
                 ScanningStyleSelectorView(selectedStyle: $selectedStyle)
             }
             
+            // 图片解码按钮
+            if !showPreviewPause {
+                Button(action: {
+                    onImageDecode()
+                }) {
+                    HStack(spacing: 8) {
+                        Image(systemName: "photo.on.rectangle.angled")
+                            .font(.system(size: 16, weight: .semibold))
+                        
+                        Text("图片解码")
+                            .font(.subheadline)
+                            .fontWeight(.medium)
+                    }
+                    .foregroundColor(.white)
+                    .padding(.horizontal, 16)
+                    .padding(.vertical, 10)
+                    .background(
+                        RoundedRectangle(cornerRadius: 12)
+                            .fill(Color.blue.opacity(0.8))
+                            .overlay(
+                                RoundedRectangle(cornerRadius: 12)
+                                    .stroke(Color.blue, lineWidth: 1)
+                            )
+                    )
+                }
+                .buttonStyle(PlainButtonStyle())
+            }
+            
             // 移除关闭按钮，因为现在使用导航返回
         }
         .padding(.bottom, 50)
@@ -87,19 +119,104 @@ struct ScanningStyleSelectorView: View {
     @Binding var selectedStyle: ScanningLineStyle
     
     var body: some View {
-        HStack(spacing: 10) {
+        VStack(spacing: 12) {
+            // 标题
+            Text("扫描线样式")
+                .font(.caption)
+                .foregroundColor(.white.opacity(0.8))
+                .padding(.bottom, 4)
+            
+            // 样式选择器
+            HStack(spacing: 8) {
                 ForEach(ScanningLineStyle.allCases, id: \.self) { style in
-                Button(style.localizedName) {
+                    Button(action: {
+                        withAnimation(.easeInOut(duration: 0.2)) {
                             selectedStyle = style
                         }
+                        
+                        // 添加触觉反馈
+                        let impactFeedback = UIImpactFeedbackGenerator(style: .light)
+                        impactFeedback.impactOccurred()
+                    }) {
+                        VStack(spacing: 4) {
+                            // 样式预览
+                            stylePreview(style)
+                                .frame(width: 24, height: 24)
+                            
+                            // 样式名称
+                            Text(style.localizedName)
+                                .font(.caption2)
                                 .foregroundColor(.white)
-                .padding(.horizontal, 8)
-                .padding(.vertical, 4)
-                .background(selectedStyle == style ? Color.green : Color.gray.opacity(0.6))
-                .cornerRadius(8)
-                .font(.caption)
                         }
+                        .frame(width: 60, height: 50)
+                        .background(
+                            RoundedRectangle(cornerRadius: 12)
+                                .fill(selectedStyle == style ? 
+                                      Color.green.opacity(0.8) : 
+                                      Color.black.opacity(0.6))
+                                .overlay(
+                                    RoundedRectangle(cornerRadius: 12)
+                                        .stroke(selectedStyle == style ? 
+                                               Color.green : 
+                                               Color.white.opacity(0.3), 
+                                               lineWidth: selectedStyle == style ? 2 : 1)
+                                )
+                        )
+                    }
+                    .buttonStyle(PlainButtonStyle())
                 }
+            }
+        }
+        .padding(.horizontal, 16)
+        .padding(.vertical, 12)
+        .background(
+            RoundedRectangle(cornerRadius: 16)
+                .fill(Color.black.opacity(0.7))
+                .overlay(
+                    RoundedRectangle(cornerRadius: 16)
+                        .stroke(Color.white.opacity(0.2), lineWidth: 1)
+                )
+        )
         .padding(.bottom, 10)
     }
+    
+    // 样式预览
+    @ViewBuilder
+    private func stylePreview(_ style: ScanningLineStyle) -> some View {
+        switch style {
+        case .modern:
+            Rectangle()
+                .fill(
+                    LinearGradient(
+                        colors: [.blue, .cyan, .blue],
+                        startPoint: .leading,
+                        endPoint: .trailing
+                    )
+                )
+                .frame(width: 20, height: 2)
+                .shadow(color: .blue, radius: 2, x: 0, y: 0)
+        case .classic:
+            Rectangle()
+                .fill(Color.green)
+                .frame(width: 16, height: 2)
+        case .neon:
+            Rectangle()
+                .fill(Color.purple)
+                .frame(width: 18, height: 3)
+                .shadow(color: .purple, radius: 3, x: 0, y: 0)
+        case .minimal:
+            Rectangle()
+                .fill(Color.white)
+                .frame(width: 14, height: 1)
+        case .retro:
+            Rectangle()
+                .fill(Color.orange)
+                .frame(width: 20, height: 2)
+                .overlay(
+                    Rectangle()
+                        .stroke(Color.yellow, lineWidth: 0.5)
+                        .frame(width: 18, height: 1.5)
+                )
+        }
+    }
 }