iOS/iPadOS 17.1 has new issue with QR scanning

Question

azun-c OP

Created Oct ’23

Replies 3

Boosts 1

Views 1.6k

Participants 2

After upgrading to iOS 17.1, I can't scan some QR codes. The same codes can be scanned correctly before. In details

iPadOS 17.0 and earlier: Works well
iPadOS 17.1: Something goes wrong
Sample project code:

 func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
        captureSession.stopRunning()
 
        if let metadataObject = metadataObjects.first {
            guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
            guard let stringValue = readableObject.stringValue else {
                foundButInvalid()
                return
            }
            found(code: stringValue)
        }
    }

Sample QR code

Boost

Answer 1

azun-c OP

Nov ’23

I eventually see the problem with Camera app:

iOS 16: detected QR code and decoded the code
iPadOS 17.1: detected QR code but couldn't decode the code

It seems the decoding has been updated. Does anyone have the same issue?

0

Answer 2

hikaru145 OP

Nov ’23

I am having the same problem. We are creating an app in Japan that reads QR codes for electronic medication registers. The standard for medical information is exported in multi-byte format, so we need a compatible QR code scanner to read them. The QR code scanner library (react-native-vision-camera) we are using now probably uses Apple's camera library by default and cannot encode Shift_JIS since 17.1. The only result is a "null" return. It is readable with 17.0.3, but not with 17.1. I would really appreciate it if Apple could improve this problem of not being able to read.

1

Answer 3

azun-c OP

Nov ’23

@hikaru145 Good news: iOS 17.2 beta 2 seems to fix the issue.

0

	func metadataOutput(_ output: AVCaptureMetadataOutput, didOutput metadataObjects: [AVMetadataObject], from connection: AVCaptureConnection) {
	captureSession.stopRunning()

	if let metadataObject = metadataObjects.first {
	guard let readableObject = metadataObject as? AVMetadataMachineReadableCodeObject else { return }
	guard let stringValue = readableObject.stringValue else {
	foundButInvalid()
	return
	}
	found(code: stringValue)
	}
	}