open class CIDetector : NSObject { // 初始化方法 public init?(ofType type: String, context: CIContext?, options: [String : Any]? = nil) // 獲取識別特征 open func features(in image: CIImage) -> [CIFeature] open func features(in image: CIImage, options: [String : Any]? = nil) -> [CIFeature]}// 識別類型public let CIDetectorTypeFace: String // 面部識別public let CIDetectorTypeRectangle: String // 矩形識別public let CIDetectorTypeQRCode: String // 條碼識別public let CIDetectorTypeText: String // 文本識別// 下面定義的就是options中可以傳的參數public let CIDetectorAccuracy: String // 識別精度public let CIDetectorAccuracyLow: String // 低精度，識別速度快public let CIDetectorAccuracyHigh: String // 高精度，識別速度慢public let CIDetectorTracking: String // 是否開啟面部追蹤public let CIDetectorMinFeatureSize: String // 指定最小尺寸的檢測器，小于這個尺寸的特征將不識別，CIDetectorTypeFace(0.01 ~ 0.50)，CIDetectorTypeText(0.00 ~ 1.00)，CIDetectorTypeRectangle(0.00 ~ 1.00)public let CIDetectorMaxFeatureCount: String // 設置返回矩形特征的最多個數 1 ~ 256 默認值為1public let CIDetectorNumberOfAngles: String // 設置角度的個數 1, 3, 5, 7, 9, 11public let CIDetectorImageOrientation: String // 識別方向public let CIDetectorEyeBlink: String // 眨眼特征public let CIDetectorSmile: String // 笑臉特征public let CIDetectorFocalLength: String // 每幀焦距public let CIDetectorAspectRatio: String // 矩形寬高比public let CIDetectorReturnSubFeatures: String // 文本檢測器是否應該檢測子特征，默認值是否

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) { // 1.取到圖片 let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage // 2.生成CIImage let ciimage = CIImage(cgImage: image!.cgImage!) // 3.識別精度 let options = [CIDetectorAccuracy: CIDetectorAccuracyHigh] /** 4.創建識別器，3個參數 ofType：識別類型 CIDetectorTypeFace 面部識別 CIDetectorTypeText 文本識別 CIDetectorTypeQRCode 條碼識別 CIDetectorTypeRectangle 矩形識別 context：上下文，默認傳nil options：識別精度 CIDetectorAccuracyLow 低精度，識別速度快 CIDetectorAccuracyHigh 高精度，識別速度慢 */ let detector = CIDetector(ofType: CIDetectorTypeQRCode, context: nil, options: options) /** 5.獲取識別結果，2個參數 in：需要識別的圖片 options：需要識別的特征 CIDetectorMinFeatureSize: 指定最小尺寸的檢測器，小于這個尺寸的特征將不識別，CIDetectorTypeFace(0.01 ~ 0.50)，CIDetectorTypeText(0.00 ~ 1.00)，CIDetectorTypeRectangle(0.00 ~ 1.00) CIDetectorTracking: 是否開啟面部追蹤 TRUE 或 FALSE CIDetectorMaxFeatureCount: 設置返回矩形特征的最多個數 1 ~ 256 默認值為1 CIDetectorNumberOfAngles: 設置角度的個數 1, 3, 5, 7, 9, 11 CIDetectorImageOrientation: 識別方向 CIDetectorEyeBlink: 眨眼特征 CIDetectorSmile: 笑臉特征 CIDetectorFocalLength: 每幀焦距 CIDetectorAspectRatio: 矩形寬高比 CIDetectorReturnSubFeatures: 文本檢測器是否應該檢測子特征，默認值是否 */ let features = detector?.features(in: ciimage, options: nil) // 遍歷出二維碼 for item in features! where item.isKind(of: CIQRCodeFeature.self) { print((item as! CIQRCodeFeature).messageString ?? "") } }