ios swift3.0实现二维码扫描、生成、识别示例代码

  //设置捕捉设备    let device = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)    do    {      //设置设备输入输出      let input = try AVCaptureDeviceInput(device: device)      let output = AVCaptureMetadataOutput()      output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)      //设置会话      let scanSession = AVCaptureSession()      scanSession.canSetSessionPreset(AVCaptureSessionPresetHigh)      if scanSession.canAddInput(input)      {        scanSession.addInput(input)      }      if scanSession.canAddOutput(output)      {        scanSession.addOutput(output)      }      //设置扫描类型(二维码和条形码)      output.metadataObjectTypes = [      AVMetadataObjectTypeQRCode,      AVMetadataObjectTypeCode39Code,      AVMetadataObjectTypeCode128Code,      AVMetadataObjectTypeCode39Mod43Code,      AVMetadataObjectTypeEAN13Code,      AVMetadataObjectTypeEAN8Code,      AVMetadataObjectTypeCode93Code]      //预览图层      let scanPreviewLayer = AVCaptureVideoPreviewLayer(session:scanSession)      scanPreviewLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill      scanPreviewLayer?.frame = view.layer.bounds      view.layer.insertSublayer(scanPreviewLayer!, at: 0)      //自动对焦      if (device?.isFocusModeSupported(.autoFocus))!      {        do { try input.device.lockForConfiguration() } catch{ }        input.device.focusMode = .autoFocus        input.device.unlockForConfiguration()      }      //设置扫描区域      NotificationCenter.default.addObserver(forName: NSNotification.Name.AVCaptureInputPortFormatDescriptionDidChange, object: nil, queue: nil, using: {[weak self] (noti) in          output.rectOfInterest = (scanPreviewLayer?.metadataOutputRectOfInterest(for: self!.scanPane.frame))!      })      //保存会话      self.scanSession = scanSession    }    catch    {      //摄像头不可用      Tool.confirm(title: "温馨提示", message: "摄像头不可用", controller: self)      return    }

    if !scanSession.isRunning    {      scanSession.startRunning()    }

//扫描捕捉完成extension ScanCodeViewController : AVCaptureMetadataOutputObjectsDelegate{  func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!)  {    //停止扫描    self.scanLine.layer.removeAllAnimations()    self.scanSession!.stopRunning()    //播放声音    Tool.playAlertSound(sound: "noticeMusic.caf")    //扫完完成    if metadataObjects.count > 0    {      if let resultObj = metadataObjects.first as? AVMetadataMachineReadableCodeObject      {        Tool.confirm(title: "扫描结果", message: resultObj.stringValue, controller: self,handler: { (_) in          //继续扫描          self.startScan()        })      }    }  }}

    //2.二维码滤镜    let contentData = self.data(using: String.Encoding.utf8)    let fileter = CIFilter(name: "CIQRCodeGenerator")    fileter?.setValue(contentData, forKey: "inputMessage")    fileter?.setValue("H", forKey: "inputCorrectionLevel")    let ciImage = fileter?.outputImage    //3.颜色滤镜    let colorFilter = CIFilter(name: "CIFalseColor")    colorFilter?.setValue(ciImage, forKey: "inputImage")    colorFilter?.setValue(CIColor(cgColor: QRCodeColor.cgColor), forKey: "inputColor0")// 二维码颜色    colorFilter?.setValue(CIColor(cgColor: QRCodeBgColor.cgColor), forKey: "inputColor1")// 背景色    //4.生成处理    let outImage = colorFilter!.outputImage    let scale = QRCodeSize / outImage!.extent.size.width;    let transform = CGAffineTransform(scaleX: scale, y: scale)    let transformImage = colorFilter!.outputImage!.applying(transform)

let image = UIImage(ciImage: ciImage)

// 绘制logoUIGraphicsBeginImageContextWithOptions(image.size, false, UIScreen.main.scale)    image.draw(in: CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height))//线框let logoBorderLineImagae = QRCodeLogo.getRoundRectImage(size: logoWidth, radius: radius, borderWidth: borderLineWidth, borderColor: borderLineColor)//边框let logoBorderImagae = logoBorderLineImagae.getRoundRectImage(size: logoWidth, radius: radius, borderWidth: boderWidth, borderColor: borderColor)logoBorderImagae.draw(in: logoFrame)let QRCodeImage = UIGraphicsGetImageFromCurrentImageContext()UIGraphicsEndImageContext()

 /**   1.生成二维码   - returns: 黑白普通二维码(大小为300)   */  func generateQRCode() -> UIImage    /**   2.生成二维码   - parameter size: 大小   - returns: 生成带大小参数的黑白普通二维码   */   func generateQRCodeWithSize(size:CGFloat?) -> UIImage     /**   3.生成二维码   - parameter logo: 图标   - returns: 生成带Logo二维码(大小:300)   */   func generateQRCodeWithLogo(logo:UIImage?) -> UIImage     /**   4.生成二维码   - parameter size: 大小   - parameter logo: 图标   - returns: 生成大小和Logo的二维码   */  func generateQRCode(size:CGFloat?,logo:UIImage?) -> UIImage    /**   5.生成二维码   - parameter size:  大小   - parameter color:  颜色   - parameter bgColor: 背景颜色   - parameter logo:  图标   - returns: 带Logo、颜色二维码   */  func generateQRCode(size:CGFloat?,color:UIColor?,bgColor:UIColor?,logo:UIImage?) -> UIImage    /**   6.生成二维码   - parameter size:      大小   - parameter color:      颜色   - parameter bgColor:     背景颜色   - parameter logo:      图标   - parameter radius:     圆角   - parameter borderLineWidth: 线宽   - parameter borderLineColor: 线颜色   - parameter boderWidth:   带宽   - parameter borderColor:   带颜色   - returns: 自定义二维码   */  func generateQRCode(size:CGFloat?,color:UIColor?,bgColor:UIColor?,logo:UIImage?,radius:CGFloat,borderLineWidth:CGFloat?,borderLineColor:UIColor?,boderWidth:CGFloat?,borderColor:UIColor?) -> UIImage使用DispatchQueue.global().async {let image = content.generateQRCodeWithLogo(logo: self.logoImageView.image)        DispatchQueue.main.async(execute: {          self.QRCodeImageView.image = image        })      }

  func recognizeQRCode() -> String?  {    let detector = CIDetector(ofType: CIDetectorTypeQRCode, context: nil, options: [CIDetectorAccuracy : CIDetectorAccuracyHigh])    let features = detector?.features(in: CoreImage.CIImage(cgImage: self.cgImage!))    guard (features?.count)! > 0 else { return nil }    let feature = features?.first as? CIQRCodeFeature    return feature?.messageString  }

DispatchQueue.global().async {      let recognizeResult = self.sourceImage?.recognizeQRCode()      let result = recognizeResult?.characters.count > 0 ? recognizeResult : "无法识别"      DispatchQueue.main.async {        Tool.confirm(title: "扫描结果", message: result, controller: self)        self.activityIndicatoryView.stopAnimating()      }    }