Question

我正在使用QRcode创建一个应用程序，我有一个使用条形码扫描仪的先前代码。可以将其修改为QRcode扫描仪吗？

由于

Answer 1

CIdetector type: CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{CIDetectorAccuracy:CIDetectorAccuracyHigh}];

将CIdetector类型更改为CIDetectorTypeQRCode。

Answer 2

要扫描条形码和qrcode，您可以使用下面的代码段

在视图控制器中添加它

as.Date

然后在viewcontroller中添加此函数

p2p_dt_SKILL_A%>%
                select(Patch,Date,Prod_DL)%>%
                filter(between(Date, as.Date("2015-09-05"),as.Date("2015-09-17")))

然后在let supportedCodeTypes = [AVMetadataObjectTypeUPCECode, AVMetadataObjectTypeCode39Code, AVMetadataObjectTypeCode39Mod43Code, AVMetadataObjectTypeCode93Code, AVMetadataObjectTypeCode128Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeAztecCode, AVMetadataObjectTypePDF417Code, AVMetadataObjectTypeQRCode]

中

    func startVideoCapture(){
        // Get an instance of the AVCaptureDevice class to initialize a device object and provide the video as the media type parameter.
        let captureDevice = AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)

        do {
            // Get an instance of the AVCaptureDeviceInput class using the previous device object.
            let input = try AVCaptureDeviceInput(device: captureDevice)

            // Initialize the captureSession object.
            captureSession = AVCaptureSession()

            // Set the input device on the capture session.
            captureSession?.addInput(input)

            // Initialize a AVCaptureMetadataOutput object and set it as the output device to the capture session.
            let captureMetadataOutput = AVCaptureMetadataOutput()
            captureSession?.addOutput(captureMetadataOutput)

            // Set delegate and use the default dispatch queue to execute the call back
            captureMetadataOutput.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
            captureMetadataOutput.metadataObjectTypes = supportedCodeTypes

            // Initialize the video preview layer and add it as a sublayer to the viewPreview view's layer.
            videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
            videoPreviewLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill
            videoPreviewLayer?.frame = self.qrCodeView.bounds
            self.qrCodeView.layer.addSublayer(videoPreviewLayer!)
            self.qrCodeView.clipsToBounds = true
            // Start video capture.
            captureSession?.startRunning()
            qrCodeFrameView = UIView()

//            if let qrCodeFrameView = qrCodeFrameView {
//                qrCodeFrameView.layer.borderColor = UIColor.green.cgColor
//                qrCodeFrameView.layer.borderWidth = 2
//                self.qrCodeView.addSubview(qrCodeFrameView)
//                self.qrCodeView.bringSubview(toFront: qrCodeFrameView)
//            }

        } catch {
            // If any error occurs, simply print it out and don't continue any more.
            print(error)
            return
        }
    }

并且在调用startVideoCapture

之前不要忘记检查相机权限

我们可以使用条形码扫描仪作为QRcode扫描仪吗？

2 个答案: