qr-code

问题 Question There are (standard) size limits for strings presented by a QR-Code. Typical limits: QR-Code of Version- 1-L -Alphanumeric : 25 characters . QR-Code of Version- 1-M -Alphanumeric : 20 characters . and there are software tools that transforms a input string into a image of the corresponding QR-Code symbol . These tools MUST respect the standard limits... But when you test any of these tools , they not respect... They not agree about ISO standard limits? There are "another ISO"? There

问题 i am currently learning on QR code webcam decoder. i have taken an example from https://zxingnet.svn.codeplex.com/svn/trunk/Clients/AForgeDemo/ and have succesfully build it without error. however when i run it with my webcam connected, no input or it wont switch on the webcam. based on my understanding, the webcam would be switch on when user select it at combobox. well, since there is no error at build, i cant pinpoint what went wrong. i have also taken a look at a project which switch on

问题 We're looking to read some QR codes in a Windows 8 Metro app. .NET libraries we've used in the past can't be referenced in WinRT/Metro and porting them won't be easy because they depend on System.Drawing which isn't in the .NET for Metro style apps. We looked at this by Benjamin Soulier but it didn't seem to work. Any other suggestions or something easy we're missing? Thanks 回答1: You can use ZXing.Net: http://zxingnet.codeplex.com/ For Metro apps based upon HTML5/Javascript I'm currently

问题 Currently im trying to load a qrcode in buffer so it would display on the spot. This is my current revision for the code. package wallettemplate; import com.google.zxing.*; import com.google.zxing.client.j2se.BufferedImageLuminanceSource; import com.google.zxing.client.j2se.MatrixToImageWriter; import com.google.zxing.common.BitMatrix; import com.google.zxing.common.HybridBinarizer; import com.google.zxing.qrcode.QRCodeWriter; import javax.imageio.ImageIO; import java.awt.image.BufferedImage;

问题 I'm starting a CakePHP Helper based on phpqrcode. My problem is that i can't get the generated png or svg file and force the browser to download it. i want to when a person submit his text via Ajax, i generate a QR Code for him and force the browser to download it without saving the file on the server. Here is a short example of the Helper: App::import('Vendor', 'QRGenerator.phpqrcode'.DS.'qrlib'); class QRHelper extends AppHelper{ function text($content= '') { QRcode::png($content); } } In

问题 I'm creating QR Codes in my app and I'm wanting to know if it's possible to add a second key-value pair. Right now I have a 12 digit number for the "inputMessage" key and I'm wanting to have some other data for another key. For example, using another string for a new key called "gym". Here is my function for creating the QR Code: func generateCode() { let gymData = gymName.dataUsingEncoding(NSISOLatin1StringEncoding, allowLossyConversion: false) let codeNumberData = generateRandomNumber(12)

问题 I am using the code provided by https://www.hackingwithswift.com/example-code/media/how-to-scan-a-qr-code to make my own scanning app. But I like my scanning to occur on button press. Now for this I put the viewDidLoad() part from the tutorial into its own function: func cameraScanningLayer(){ view.backgroundColor = UIColor.blackColor() captureSession = AVCaptureSession() let videoCaptureDevice = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo) let videoInput: AVCaptureDeviceInput

问题 I have scanned a image using my iphone and get the below type result. <?xml version="1.0" encoding="UTF-8"?> <PrintLetterBarcodeData uid="229636134720" name="Nandan Mohan Nilekani" gender="M" yob="1955" house="856, 13th Main , 3rd Block" loc="Koramangala" vtc="Bangalore South" po="Koramangala" dist="Bangalore" state="Karnataka" pc="560034"/> How can best way to split or parse the above xml data. 回答1: Please check this code - (void)viewDidLoad{ [super viewDidLoad]; NSString *DataPath = @"

问题 I've been looking into OAuth to see if it can be used in a project I'm working on. I'm starting to doubt if its possible. It's based on two factor authentication with a mobile device. Essentially I'll have a login page where upon successful login a QRCode will appear on screen. The user will be prompted to scan this code with their android device (An app I'm making myself) which will authenticate them with the server. I'm not sure if this fits with the OAuth paradigm so I'm thinking I may

问题 In my meteor, I need to implement a qr code scanner. I am trying to use cordova barcode scanner package for meteor . The scanner is running fine on the android phone. But my requirement is to put this scanner inside a fixed div , so that other actions can also be kept to perform other functions. For example, at the top right corner in the screen, there will be a cancel button, and below that there will be an header with some text, and below that should be placed the scanner. This whole thing