1D and 2D barcodes reader and generators for iOS 8 with delightful controls. Now Swift.

I am building an app that utilizes QR code scanning. What I am trying to do in my ScanViewController is to scan a QR code, validate what was scanned, and then segue with the scanned data. Currently, when a QR code is detected, my UI freezes, and shortly after I get an error and memory dump:

'NSInternalInconsistencyException', reason: 'Only run on the main thread!'.

Maybe, this isn't the right place to validate the QR code or isn't the right place to segue, but if not, I'm wondering where the validation and segue should take place. My only other requirement is that the validation only occurs when a QR code is detected, which I believe to happen when captureOutput() is called in RSCodeReaderViewController.

class ScanViewController: RSCodeReaderViewController{
    // Class Variables
    var finalObject: IBuiltCode?
    let ObjectHelper = ObjectBuilder() // Service to validate and build valid scanned objects

    override func viewDidLoad() {
        super.viewDidLoad()

        self.focusMarkLayer.strokeColor = UIColor.redColor().CGColor
        self.cornersLayer.strokeColor = UIColor.yellowColor().CGColor

        self.tapHandler = { point in
            println(point)
        }

        self.barcodesHandler = { barcodes in
            for barcode in barcodes {
                println("Barcode found: type=" + barcode.type + " value=" + barcode.stringValue)
                // returns nil if invalid (can provide validateAndBuild func code if necessary)
                var builtObject = self.ObjectHelper.validateAndBuild(barcode,
                      scannedData: barcode.stringValue)
                if builtObject != nil{
                    println("Good object.")
                    self.performQR()
                }
            }
        }
    }

    func performQR(){
        performSegueWithIdentifier("toQR", sender: self)
    }
    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if (segue.identifier == "toQR"){
            let QRVC: QRViewController = segue.destinationViewController as! QRViewController
            QRVC.receivedObject = finalObject as? QRObject
        }
    }
}

Target size was added to the interface in order to scale the resulting image before it is converted into an UIImage. Scaling a UIImage results in pixellation, so the change is done on the CIImage.

Setting stroke and fill colours did not apply to CIFilter generated code tags. This is now supported.

The code changes are backwards compatible.

Hi

Installed using Cocoapods, went through the reader process and when I get to the point where I need to choose a subclass for ScanViewController, RSCodeReaderViewController isn't there.

However, if I hard code RSCodeReaderViewController as a subclass, and cmd+click on RSCodeReaderViewController in the file, I successfully get directed to its implementation.

Nonetheless the ScanViewController file throws multiple errors, the first one indicating "Use of undeclared type 'RSCodeReaderViewController'".

Any ideas?

the QRCode appears very small...

let image: UIImage? = gen.generateCode(contents, machineReadableCodeObjectType: AVMetadataObjectTypeQRCode) if let image = image { self.barcodeView.image = RSAbstractCodeGenerator.resizeImage(image, scale: 1.0) }

I was tying to build my project where I use RSBarcodes but I get a compiler error saying that: Value of type 'AVMetadataMachineReadableCodeObject' has no member 'corners'

It occurs on RSCodeReaderViewController.swift at line 401.

How can I fix it?

Hi guys, sorry to bother you about this but I wasn't able to run the project, it seems there are the RSBarcodes.framework file missing. Can you help me, please?

I can't generate interleaved2of5 barcode image. This is my code, it's the same as the example, I just changed the machineReadableCodeObjectType and it's returning nil.

        let gen = RSUnifiedCodeGenerator.shared
        gen.fillColor = UIColor.white
        gen.strokeColor = UIColor.black
        print ("generating image with barcode: " + barcode)
        if let image = gen.generateCode(barcode, machineReadableCodeObjectType: AVMetadataObject.ObjectType.interleaved2of5.rawValue) {
            self.barcodeImageView.layer.borderWidth = 1
            self.barcodeImageView.image = RSAbstractCodeGenerator.resizeImage(image, targetSize: self.barcodeImageView.bounds.size, contentMode: UIViewContentMode.bottomRight)
        }

I have set up a ViewController as described, it worked a few times and I was able to scan codes, however now it just shows a black screen. I've given it access to my camera so I am not sure how to fix this issue. Any ideas?

I can't seem to figure out why the barcodes are only scanned when it's in the top half of the camera feed. This is true in portrait and landscape orientation. Is this expected behavior?

The scanner view (actually the AVCaptureVideoPreviewLayer) does not handle rotation properly. I could make it better by adding this in RSCodeReaderViewController.swift - however the orientation is still wrong when the initial device orientation is not portrait (such as with an iPad).

override func viewWillTransitionToSize(size: CGSize, withTransitionCoordinator coordinator: UIViewControllerTransitionCoordinator) {
    let previousTransform = layer!.affineTransform()
    let rotation = coordinator.targetTransform()
    let newTransform = CGAffineTransformConcat(previousTransform, CGAffineTransformInvert(rotation))
    layer!.setAffineTransform(newTransform)
    layer!.frame.origin = CGPointZero
}

P.S: Thanks for this great library!

Hello.

Is it possible to use this library omitting features accessing iPhone camera because I do not use camera feature in my app (only displaying barcode on UIImageView) and would like to remove NSCameraUsageDescription in info.plist. In fact my app got a following mail from Apple and failed to submit:

ITMS-90683: Missing Purpose String in Info.plist
 
Your app’s code references one or more APIs that access sensitive user data.
The app’s Info.plist file should contain a NSCameraUsageDescription key with a user-facing purpose string explaining clearly and completely why your app needs the data.

Thank you.

Hi! Using RSBarcodes_Swift via SPM in a project results in an error message when trying to upload to TestFlight:

ERROR ITMS-90049: This bundle is invalid. The bundle at path <...> has an invalid CFBundleIdentifier 'RSBarcodes_Swift' There are invalid characters(characters that are not dots, hyphen and alphanumerics) that have been replaced with their code point 'RSBarcodes\u005fSwift'

'shared' is unavailable in application extensions for iOS: Use view controller based solutions where appropriate instead.

This is a new error popping up on the iOS 15 for SwiftUI Applications. It seems to be tied to: let statusBarOrientation = UIApplication.shared.statusBarOrientation

Hello,

Swift 5.1 introduced Module stability. I was wondering, what do we nee do to do add Support for BUILD_LIBRARIES_FOR_DISTRBUTION set to YES. This is so the module can be stable and won't need to be recompiled for every Xcode release.

Thanks

Hi, Here is a code I use to generate barcode:

RSUnifiedCodeGenerator.shared.strokeColor = .red RSUnifiedCodeGenerator.shared.fillColor = .blue result = RSUnifiedCodeGenerator.shared.generateCode("2166529V", machineReadableCodeObjectType: AVMetadataObject.ObjectType.aztec.rawValue) result = RSAbstractCodeGenerator.resizeImage(result, scale: 10)

The problem that after resizing the barcode doesn't keep colors I set before. How to set colors after image resizing?

I am trying to make app which will generate barcode images with special characters like: ¿ ¶ µ but it is not generating correctly

let unicodeChar: Character = "\u{00B0}" let encodeType = getBarcodeTypeFor(typeStr: card.barcodeType) self.barcodeImageView.image = UIImage().toBarcode(string: ";038388(unicodeChar)", encoder: encodeType, inputCorrectionLevel: .Medium)

After barcode scan barcode scanner returns text: ;038388%C2%B0 and I want to return it ;038388¿