qr-code

I am creating a QR Code on the fly and storing it as UIImage. Now I want to be able to send it using the UIActivityViewController but somehow it fails: func generateQRCode(from string: String) -> UIImage? { let data = string.data(using: String.Encoding.ascii) if let filter = CIFilter(name: "CIQRCodeGenerator") { filter.setValue(data, forKey: "inputMessage") let transform = CGAffineTransform(scaleX: 3, y: 3) if let output = filter.outputImage?.applying(transform) { return UIImage(ciImage: output) } } return nil } And then I am calling the function and store it as UIImage: let image =

I need to have a QR scanner in my project. I use ZBar for doing this task. Mainly I did a very small change on the example code given by ZBar git example to do the job. I need to show the scanned result in a browser(if url) or in a dialog(if normal information). Every thing working well with my code given bellow except if I try to show the url after scan a qr code in browser. When I come back to my app from the browser the camera viewport turns black and remain inactive. I tried to get back the camera active to scan another qr code but i failed. I tried to reopen the camera in my onResume()

I have read some answer for this question in stackoverflow, but it is not working for me. I have already a project, and now I want to integrate QR Code and barcode reader into my project. I downloaded the zip file from: core-2.2.zip I didn't find any "core.jar", I read that I have to integrate files added in "core" folder. Do I have to add all classes to my project (the whole folder)? or do I have to create a jar file with that folder? I am using Android Studio. Any one can help me? thank you There is indeed an Android application that is part of the ZXing project. It uses the core module

Quick googling result that QR code can hold nearly 3kb (8 bit) data. But isn't it just using black/white dots to represent bits? If so there's no way that there's over 20,000 dots on a code. So I'm obviously misunderstanding. Can someone explain how it works? Denso Wave says that the QR bar code can be as large as 177 by 177, allowing for 31,329 dots. That is enough space for about 3kB, even allowing for position, alignment, timing, version, and formatting information. Mitch Wheat QR Code data capacity Numeric only: Max. 7,089 characters Alphanumeric: Max. 4,296 characters Binary (8 bits): Max

How to generate 2-d QR Code for some text and also having an image at centre in android ? I browse a lot but i found only how to generate simple 2-d QR code using ZXing library using this link . Is it possible to generate 2-d QR Code having an image at center using ZXing library ? To center-align an image use code like in my activity_main.xml : <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <ImageView android:id="@+id/myImage" android:layout

When scanning QR codes with ZBar the string resulting from the process does not display unicode characters properly. The word Márti encoded as a QR code by any free to use QR code generator (like http://qrcode.kaywa.com ) would result in Mﾃ｡rti . In other SO questions ( 1 , 2 ) it was suggested to embed a BOM at the start of the resulting string, but doing this: NSString *qrString = [NSString stringWithFormat:@"\xEF\xBB\xBF%@",symbol.data]; or this: NSString *qrString = [[NSString alloc] initWithFormat:@"\357\273\277%@", symbol.data]; resulted in the same, flawed result with the Asian