导入 XuXuCheck 工程(iOS 干化学尿液试纸分析 App)

从桌面工程复制而来,作为本仓库的 Xuxucheck/ 子目录。为控制仓库体积做了两处删减: - 移除 Frameworks/opencv2.xcframework 下的两个 visionOS 切片 (xros-arm64、xros-arm64-simulator,合计约 106 MB),并同步删掉该 xcframework 内 Info.plist 里对应的两条 AvailableLibraries 记录, 只保留 ios-arm64 与 ios-arm64_x86_64-simulator。 - 移除全部 .DS_Store 与 xcuserdata/。已用 xcodebuild 从本目录完整编译验证:BUILD SUCCEEDED, ProcessXCFramework 以 --platform ios 成功选中框架,产物含 3699 个 cv:: 符号 (OpenCV 确实链入),嵌入 framework 3 个,与移除无用 pod 之后的状态一致。仓库约 206 MB,其中 OpenCV 203 MB、其余源码与依赖约 3 MB。
2026-09-23 14:17:31 +08:00
commit d6aeede2bc
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+//
+//  CameraManager.swift
+//  XuXuCheck
+//
+//  Created by henseycai on 2025/6/25.
+//
+
+import AVFoundation
+import CoreImage
+
+
+class CameraManager: NSObject {
+    
+    private let captureSession = AVCaptureSession()
+    private var deviceInput: AVCaptureDeviceInput?
+    private var videoOutput: AVCaptureVideoDataOutput?
+    private let systemPreferredCamera = AVCaptureDevice.default(for: .video)
+
+    private var sessionQueue = DispatchQueue(label: "video.preview.session")
+    
+    private var addToPreviewStream: ((CGImage) -> Void)?
+    
+    lazy var previewStream: AsyncStream<CGImage> = {
+        AsyncStream { continuation in
+            addToPreviewStream = { cgImage in
+                continuation.yield(cgImage)
+            }
+        }
+    }()
+    
+    private var isAuthorized: Bool {
+        get async {
+            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
+        }
+    }
+    
+    override init() {
+        super.init()
+        
+        Task {
+            await configureSession()
+            //await startSession()
+        }
+        
+    }
+    public func StartCapture(){
+        Task{
+            await startSession()
+        }
+    }
+    public func StopCapture(){
+        Task{
+            await stopSession()
+        }
+    }
+    
+    private func startSession() async {
+        guard await isAuthorized else { return }
+        captureSession.startRunning()
+    }
+    
+    private func stopSession() async {
+        guard await isAuthorized else { return }
+        captureSession.stopRunning()
+    }
+    
+    private func configureSession() async {
+        guard await isAuthorized,
+              let systemPreferredCamera,
+              let deviceInput = try? AVCaptureDeviceInput(device: systemPreferredCamera)
+        else { return }
+        
+        captureSession.beginConfiguration()
+        
+        defer {
+            self.captureSession.commitConfiguration()
+        }
+        
+        let videoOutput = AVCaptureVideoDataOutput()
+       
+        videoOutput.setSampleBufferDelegate(self, queue: sessionQueue)
+        
+        guard captureSession.canAddInput(deviceInput) else {
+            return
+        }
+        
+        guard captureSession.canAddOutput(videoOutput) else {
+            return
+        }
+        
+        captureSession.addInput(deviceInput)
+        captureSession.addOutput(videoOutput)
+
+        //For a vertical orientation of the camera stream
+        videoOutput.connection(with: .video)?.videoRotationAngle = 90
+    }
+    
+    
+
+    
+    private func rotate(by angle: CGFloat, from connection: AVCaptureConnection) {
+        guard connection.isVideoRotationAngleSupported(angle) else { return }
+        connection.videoRotationAngle = angle
+    }
+
+}
+
+extension CameraManager: AVCaptureVideoDataOutputSampleBufferDelegate {
+    
+    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
+        guard let currentFrame = sampleBuffer.cgImage else { 
+            print("Can't translate to CGImage")
+            return
+        }
+        addToPreviewStream?(currentFrame)
+    }
+    
+}
+
+
+extension CMSampleBuffer {
+    var cgImage: CGImage? {
+        let pixelBuffer: CVPixelBuffer? = CMSampleBufferGetImageBuffer(self)
+        guard let imagePixelBuffer = pixelBuffer else { return nil }
+        return CIImage(cvPixelBuffer: imagePixelBuffer).cgImage
+    }
+}
+
+extension CIImage {
+    var cgImage: CGImage? {
+        let ciContext = CIContext()
+        guard let cgImage = ciContext.createCGImage(self, from: self.extent) else { return nil }
+        return cgImage
+    }
+}