Enhance HistoryItemRow in HistoryView to include navigation links for barcode details, improving user interaction and data type handling.

MyQrCode/Utils/BarcodeGenerator.swift

@@ -0,0 +1,274 @@
+import Foundation
+import UIKit
+import CoreImage.CIFilterBuiltins
+
+// MARK: - 条形码生成器
+class BarcodeGenerator {
+    
+    // MARK: - 单例
+    static let shared = BarcodeGenerator()
+    
+    private init() {}
+    
+    // MARK: - 生成条形码图片
+    /// 根据内容和类型生成条形码图片
+    /// - Parameters:
+    ///   - content: 条形码内容
+    ///   - type: 条形码类型
+    ///   - size: 图片尺寸，默认 CGSize(width: 300, height: 120)
+    /// - Returns: 生成的条形码图片
+    func generateBarcode(from content: String, type: String, size: CGSize = CGSize(width: 300, height: 120), showText: Bool = true) -> UIImage? {
+        guard !content.isEmpty else { return nil }
+        
+        // 根据条形码类型选择合适的生成方式
+        switch type.lowercased() {
+        case let t where t.contains("ean13"):
+            return generateEAN13Barcode(from: content, size: size, showText: showText)
+        case let t where t.contains("ean8"):
+            return generateEAN8Barcode(from: content, size: size, showText: showText)
+        case let t where t.contains("upce"):
+            return generateUPCEBarcode(from: content, size: size, showText: showText)
+        case let t where t.contains("code39"):
+            return generateCode39Barcode(from: content, size: size, showText: showText)
+        case let t where t.contains("code128"):
+            return generateCode128Barcode(from: content, size: size, showText: showText)
+        case let t where t.contains("pdf417"):
+            return generatePDF417Barcode(from: content, size: size, showText: showText)
+        case let t where t.contains("itf14"):
+            return generateITF14Barcode(from: content, size: size, showText: showText)
+        default:
+            // 默认使用 Code 128
+            return generateCode128Barcode(from: content, size: size, showText: showText)
+        }
+    }
+    
+    // MARK: - EAN-13 条形码生成
+    private func generateEAN13Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        // EAN-13 需要13位数字
+        let paddedContent = content.padding(toLength: 13, withPad: "0", startingAt: 0)
+        filter.message = Data(paddedContent.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: paddedContent, showText: showText)
+    }
+    
+    // MARK: - EAN-8 条形码生成
+    private func generateEAN8Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        // EAN-8 需要8位数字
+        let paddedContent = content.padding(toLength: 8, withPad: "0", startingAt: 0)
+        filter.message = Data(paddedContent.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: paddedContent, showText: showText)
+    }
+    
+    // MARK: - UPC-E 条形码生成
+    private func generateUPCEBarcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        // UPC-E 需要8位数字
+        let paddedContent = content.padding(toLength: 8, withPad: "0", startingAt: 0)
+        filter.message = Data(paddedContent.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: paddedContent, showText: showText)
+    }
+    
+    // MARK: - Code 39 条形码生成
+    private func generateCode39Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        // Code 39 支持字母数字
+        filter.message = Data(content.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: content, showText: showText)
+    }
+    
+    // MARK: - Code 128 条形码生成
+    private func generateCode128Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        filter.message = Data(content.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: content, showText: showText)
+    }
+    
+    // MARK: - PDF417 条形码生成
+    private func generatePDF417Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.pdf417BarcodeGenerator()
+        
+        filter.message = Data(content.utf8)
+        filter.minWidth = 3
+        filter.maxWidth = 3
+        filter.minHeight = 3
+        filter.maxHeight = 3
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: content, showText: showText)
+    }
+    
+    // MARK: - ITF-14 条形码生成
+    private func generateITF14Barcode(from content: String, size: CGSize, showText: Bool) -> UIImage? {
+        let context = CIContext()
+        let filter = CIFilter.code128BarcodeGenerator()
+        
+        // ITF-14 需要14位数字
+        let paddedContent = content.padding(toLength: 14, withPad: "0", startingAt: 0)
+        filter.message = Data(paddedContent.utf8)
+        filter.quietSpace = 7.0
+        
+        return processBarcodeFilter(filter, context: context, size: size, content: paddedContent, showText: showText)
+    }
+    
+    // MARK: - 处理条形码滤镜
+    private func processBarcodeFilter(_ filter: CIFilter, context: CIContext, size: CGSize, content: String, showText: Bool) -> UIImage? {
+        guard let outputImage = filter.outputImage else { return nil }
+        
+        // 计算缩放比例以适应目标尺寸
+        let scaleX = size.width / outputImage.extent.width
+        let scaleY = size.height / outputImage.extent.height
+        
+        // 应用缩放变换
+        let transform = CGAffineTransform(scaleX: scaleX, y: scaleY)
+        let scaledImage = outputImage.transformed(by: transform)
+        
+        // 转换为 UIImage
+        guard let cgImage = context.createCGImage(scaledImage, from: scaledImage.extent) else { return nil }
+        
+        let baseImage = UIImage(cgImage: cgImage)
+        
+        // 如果需要显示文本，在条形码下方添加文本标签
+        if showText {
+            return addTextLabel(to: baseImage, content: content, size: size)
+        }
+        
+        return baseImage
+    }
+    
+    // MARK: - 添加文本标签
+    private func addTextLabel(to image: UIImage, content: String, size: CGSize) -> UIImage? {
+        let renderer = UIGraphicsImageRenderer(size: size)
+        
+        return renderer.image { context in
+            // 绘制原始条形码图片
+            image.draw(in: CGRect(origin: .zero, size: size))
+            
+            // 设置文本属性
+            let textAttributes: [NSAttributedString.Key: Any] = [
+                .font: UIFont.systemFont(ofSize: 12, weight: .medium),
+                .foregroundColor: UIColor.black
+            ]
+            
+            // 计算每个字符的位置，让每个数字对应其条形码位置
+            let charWidth = size.width / CGFloat(content.count)
+            let textY = size.height - 20 // 距离底部20像素
+            
+            // 为每个字符绘制背景和文本
+            for (index, char) in content.enumerated() {
+                let charString = String(char)
+                let charSize = charString.size(withAttributes: textAttributes)
+                
+                // 计算字符的X位置（居中对齐到对应的条形码区域）
+                let charX = CGFloat(index) * charWidth + (charWidth - charSize.width) / 2
+                
+                // 绘制字符背景（白色背景，确保可读性）
+                let backgroundRect = CGRect(
+                    x: charX - 2,
+                    y: textY - 2,
+                    width: charSize.width + 4,
+                    height: charSize.height + 4
+                )
+                
+                UIColor.white.setFill()
+                context.fill(backgroundRect)
+                
+                // 绘制字符
+                charString.draw(at: CGPoint(x: charX, y: textY), withAttributes: textAttributes)
+            }
+        }
+    }
+    
+    // MARK: - 获取条形码图标
+    /// 根据条形码类型获取对应的图标名称
+    /// - Parameter type: 条形码类型
+    /// - Returns: 图标名称
+    func getBarcodeIcon(for type: String) -> String {
+        let lowercasedType = type.lowercased()
+        
+        if lowercasedType.contains("ean") || lowercasedType.contains("upc") {
+            return "barcode"
+        } else if lowercasedType.contains("code39") || lowercasedType.contains("code128") {
+            return "barcode.viewfinder"
+        } else if lowercasedType.contains("pdf417") {
+            return "qrcode.viewfinder"
+        } else if lowercasedType.contains("itf14") {
+            return "barcode"
+        } else {
+            return "barcode"
+        }
+    }
+    
+    // MARK: - 验证条形码内容
+    /// 验证条形码内容是否符合类型要求
+    /// - Parameters:
+    ///   - content: 条形码内容
+    ///   - type: 条形码类型
+    /// - Returns: 是否有效
+    func validateBarcodeContent(_ content: String, type: String) -> Bool {
+        guard !content.isEmpty else { return false }
+        
+        let lowercasedType = type.lowercased()
+        
+        switch lowercasedType {
+        case let t where t.contains("ean13"):
+            return content.count == 13 && content.allSatisfy { $0.isNumber }
+        case let t where t.contains("ean8"):
+            return content.count == 8 && content.allSatisfy { $0.isNumber }
+        case let t where t.contains("upce"):
+            return content.count == 8 && content.allSatisfy { $0.isNumber }
+        case let t where t.contains("itf14"):
+            return content.count == 14 && content.allSatisfy { $0.isNumber }
+        case let t where t.contains("code39"):
+            // Code 39 支持字母、数字和一些特殊字符
+            return content.allSatisfy { $0.isLetter || $0.isNumber || " -.$/+%".contains($0) }
+        case let t where t.contains("code128"):
+            // Code 128 支持 ASCII 字符
+            return content.allSatisfy { $0.asciiValue != nil }
+        case let t where t.contains("pdf417"):
+            // PDF417 支持二进制数据
+            return true
+        default:
+            return true
+        }
+    }
+}
+
+// MARK: - String 扩展
+extension String {
+    /// 将字符串填充到指定长度
+    /// - Parameters:
+    ///   - length: 目标长度
+    ///   - pad: 填充字符
+    ///   - startingAt: 开始位置
+    /// - Returns: 填充后的字符串
+    func padding(toLength length: Int, withPad pad: String, startingAt startIndex: Int) -> String {
+        if self.count >= length {
+            return String(self.prefix(length))
+        }
+        
+        let paddingLength = length - self.count
+        let padding = String(repeating: pad, count: paddingLength)
+        return self + padding
+    }
+} 

MyQrCode/Views/BarcodeDetailView.swift

@@ -0,0 +1,352 @@
+import SwiftUI
+import CoreData
+
+struct BarcodeDetailView: View {
+    let historyItem: HistoryItem
+    @StateObject private var coreDataManager = CoreDataManager.shared
+    @State private var barcodeImage: UIImage?
+    @State private var showingShareSheet = false
+    @State private var showingAlert = false
+    @State private var alertMessage = ""
+    
+    var body: some View {
+        ScrollView {
+            VStack(spacing: 20) {
+                // 条形码图片
+                barcodeImageView
+                
+                // 条形码类型信息
+                barcodeTypeSection
+                
+                // 条形码内容信息
+                barcodeContentSection
+                
+                // 原始内容
+                originalContentSection
+                
+                // 操作按钮
+                actionButtonsSection
+            }
+            .padding()
+        }
+        .navigationTitle("条形码详情")
+        .navigationBarTitleDisplayMode(.inline)
+        .toolbar {
+            ToolbarItem(placement: .navigationBarTrailing) {
+                Button(action: {
+                    showingShareSheet = true
+                }) {
+                    Image(systemName: "square.and.arrow.up")
+                }
+            }
+        }
+        .onAppear {
+            generateBarcodeImage()
+        }
+        .sheet(isPresented: $showingShareSheet) {
+            ShareSheet(activityItems: [historyItem.content ?? ""])
+        }
+        .alert("提示", isPresented: $showingAlert) {
+            Button("确定") { }
+        } message: {
+            Text(alertMessage)
+        }
+    }
+    
+    // MARK: - 条形码图片视图
+    private var barcodeImageView: some View {
+        VStack(spacing: 16) {
+            if let barcodeImage = barcodeImage {
+                Image(uiImage: barcodeImage)
+                    .resizable()
+                    .aspectRatio(contentMode: .fit)
+                    .frame(height: 120)
+                    .cornerRadius(12)
+                    .shadow(radius: 8)
+            } else {
+                RoundedRectangle(cornerRadius: 12)
+                    .fill(Color.gray.opacity(0.3))
+                    .frame(height: 120)
+                    .overlay(
+                        ProgressView()
+                            .scaleEffect(1.5)
+                    )
+            }
+            
+            Text("扫描此条形码")
+                .font(.caption)
+                .foregroundColor(.secondary)
+        }
+    }
+    
+    // MARK: - 条形码类型信息
+    private var barcodeTypeSection: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Image(systemName: "barcode")
+                    .font(.title2)
+                    .foregroundColor(.green)
+                
+                Text("条形码类型")
+                    .font(.headline)
+                
+                Spacer()
+            }
+            
+            if let barcodeTypeString = historyItem.barcodeType {
+                HStack {
+                    Image(systemName: getBarcodeIcon(for: barcodeTypeString))
+                        .font(.title3)
+                        .foregroundColor(.green)
+                    
+                    Text(barcodeTypeString)
+                        .font(.title3)
+                        .fontWeight(.medium)
+                    
+                    Spacer()
+                }
+                .padding()
+                .background(Color.green.opacity(0.1))
+                .cornerRadius(8)
+            }
+        }
+        .padding()
+        .background(Color(.systemBackground))
+        .cornerRadius(12)
+        .shadow(radius: 2)
+    }
+    
+    // MARK: - 条形码内容信息
+    private var barcodeContentSection: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Image(systemName: "info.circle")
+                    .font(.title2)
+                    .foregroundColor(.blue)
+                
+                Text("条形码内容")
+                    .font(.headline)
+                
+                Spacer()
+            }
+            
+            if let content = historyItem.content {
+                VStack(alignment: .leading, spacing: 8) {
+                    HStack {
+                        Image(systemName: "number")
+                            .font(.title3)
+                            .foregroundColor(.blue)
+                        
+                        Text("内容长度: \(content.count) 字符")
+                            .font(.title3)
+                            .fontWeight(.medium)
+                        
+                        Spacer()
+                    }
+                    
+                    Text("数据内容")
+                        .font(.subheadline)
+                        .foregroundColor(.secondary)
+                        .padding(.top, 4)
+                }
+                .padding()
+                .background(Color.blue.opacity(0.1))
+                .cornerRadius(8)
+            }
+        }
+        .padding()
+        .background(Color(.systemBackground))
+        .cornerRadius(12)
+        .shadow(radius: 2)
+    }
+    
+    // MARK: - 原始内容
+    private var originalContentSection: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            HStack {
+                Image(systemName: "doc.text")
+                    .font(.title2)
+                    .foregroundColor(.purple)
+                
+                Text("原始内容")
+                    .font(.headline)
+                
+                Spacer()
+            }
+            
+            if let content = historyItem.content {
+                ScrollView {
+                    Text(content)
+                        .font(.system(.body, design: .monospaced))
+                        .foregroundColor(.secondary)
+                        .multilineTextAlignment(.leading)
+                        .padding()
+                        .frame(maxWidth: .infinity, alignment: .leading)
+                }
+                .frame(maxHeight: 200)
+                .background(Color.purple.opacity(0.1))
+                .cornerRadius(8)
+            }
+        }
+        .padding()
+        .background(Color(.systemBackground))
+        .cornerRadius(12)
+        .shadow(radius: 2)
+    }
+    
+    // MARK: - 操作按钮
+    private var actionButtonsSection: some View {
+        VStack(spacing: 12) {
+            // 收藏按钮
+            Button(action: toggleFavorite) {
+                HStack {
+                    Image(systemName: historyItem.isFavorite ? "heart.fill" : "heart")
+                        .foregroundColor(historyItem.isFavorite ? .red : .gray)
+                    
+                    Text(historyItem.isFavorite ? "取消收藏" : "收藏")
+                        .fontWeight(.medium)
+                }
+                .frame(maxWidth: .infinity)
+                .padding()
+                .background(historyItem.isFavorite ? Color.red.opacity(0.1) : Color.gray.opacity(0.1))
+                .foregroundColor(historyItem.isFavorite ? .red : .gray)
+                .cornerRadius(10)
+            }
+            
+            // 复制内容按钮
+            Button(action: copyContent) {
+                HStack {
+                    Image(systemName: "doc.on.doc")
+                        .foregroundColor(.blue)
+                    
+                    Text("复制内容")
+                        .fontWeight(.medium)
+                }
+                .frame(maxWidth: .infinity)
+                .padding()
+                .background(Color.blue.opacity(0.1))
+                .foregroundColor(.blue)
+                .cornerRadius(10)
+            }
+            
+            // 分享条形码图片按钮
+            if barcodeImage != nil {
+                Button(action: {
+                    showingShareSheet = true
+                }) {
+                    HStack {
+                        Image(systemName: "photo")
+                            .foregroundColor(.green)
+                        
+                        Text("分享条形码图片")
+                            .fontWeight(.medium)
+                    }
+                    .frame(maxWidth: .infinity)
+                    .padding()
+                    .background(Color.green.opacity(0.1))
+                    .foregroundColor(.green)
+                    .cornerRadius(10)
+                }
+            }
+        }
+        .padding()
+        .background(Color(.systemBackground))
+        .cornerRadius(12)
+        .shadow(radius: 2)
+    }
+    
+    // MARK: - 生成条形码图片
+    private func generateBarcodeImage() {
+        guard let content = historyItem.content else { return }
+        
+        // 使用条形码生成器
+        let barcodeType = historyItem.barcodeType ?? ""
+        let size = CGSize(width: 300, height: 120)
+        
+        if let image = BarcodeGenerator.shared.generateBarcode(from: content, type: barcodeType, size: size) {
+            self.barcodeImage = image
+        }
+    }
+    
+    // MARK: - 获取条形码图标
+    private func getBarcodeIcon(for type: String) -> String {
+        return BarcodeGenerator.shared.getBarcodeIcon(for: type)
+    }
+    
+    // MARK: - 切换收藏状态
+    private func toggleFavorite() {
+        historyItem.isFavorite.toggle()
+        coreDataManager.save()
+        
+        let message = historyItem.isFavorite ? "已添加到收藏" : "已取消收藏"
+        alertMessage = message
+        showingAlert = true
+    }
+    
+    // MARK: - 复制内容
+    private func copyContent() {
+        if let content = historyItem.content {
+            UIPasteboard.general.string = content
+            alertMessage = "内容已复制到剪贴板"
+            showingAlert = true
+        }
+    }
+}
+
+// MARK: - 分享表单
+struct BarcodeShareSheet: UIViewControllerRepresentable {
+    let activityItems: [Any]
+    
+    func makeUIViewController(context: Context) -> UIActivityViewController {
+        let controller = UIActivityViewController(activityItems: activityItems, applicationActivities: nil)
+        return controller
+    }
+    
+    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {}
+}
+
+#Preview("EAN-13") {
+    let ctx = PreviewData.context
+    let item = PreviewData.ean13Sample(in: ctx)
+    return NavigationView { BarcodeDetailView(historyItem: item) }
+}
+
+#Preview("Code 128") {
+    let ctx = PreviewData.context
+    let item = PreviewData.code128Sample(in: ctx)
+    return NavigationView { BarcodeDetailView(historyItem: item) }
+}
+
+// MARK: - Preview Data
+private enum PreviewData {
+    static let context: NSManagedObjectContext = {
+        let container = NSPersistentContainer(name: "MyQrCode")
+        let description = NSPersistentStoreDescription()
+        description.type = NSInMemoryStoreType
+        container.persistentStoreDescriptions = [description]
+        container.loadPersistentStores { _, _ in }
+        return container.viewContext
+    }()
+
+    private static func makeBaseItem(in context: NSManagedObjectContext, content: String, barcodeType: BarcodeType, favorite: Bool = false) -> HistoryItem {
+        let item = HistoryItem(context: context)
+        item.id = UUID()
+        item.content = content
+        item.dataType = DataType.barcode.rawValue
+        item.dataSource = DataSource.created.rawValue
+        item.createdAt = Date()
+        item.isFavorite = favorite
+        item.barcodeType = barcodeType.rawValue
+        return item
+    }
+
+    static func ean13Sample(in context: NSManagedObjectContext) -> HistoryItem {
+        let content = "1234567890128"
+        return makeBaseItem(in: context, content: content, barcodeType: .ean13, favorite: true)
+    }
+
+    static func code128Sample(in context: NSManagedObjectContext) -> HistoryItem {
+        let content = "ABC123"
+        return makeBaseItem(in: context, content: content, barcodeType: .code128)
+    }
+} 

MyQrCode/Views/HistoryView.swift

@@ -578,13 +578,18 @@ struct HistoryItemRow: View {
             }
         }
         .background(
-            // 为二维码类型添加导航链接
+            // 根据数据类型添加导航链接
             Group {
                 if item.dataType == DataType.qrcode.rawValue {
                     NavigationLink(
                         destination: QRCodeDetailView(historyItem: item),
                         label: { EmptyView() }
                     )
+                } else if item.dataType == DataType.barcode.rawValue {
+                    NavigationLink(
+                        destination: BarcodeDetailView(historyItem: item),
+                        label: { EmptyView() }
+                    )
                 }
             }
         )