OS X binding:

iOS binding:

ZXingObjC.Binding

Xamarin binding for the ZXingObjC library

ZXingObjC

ZXingObjC is a full Objective-C port of ZXing ("Zebra Crossing"), a Java barcode image processing library. It is designed to be used on both iOS devices and in Mac applications.

The following barcodes are currently supported for both encoding and decoding:

• UPC-A and UPC-E
• EAN-8 and EAN-13
• Code 39
• Code 93 (not implemented yet)
• Code 128
• ITF
• Codabar
• RSS-14 (all variants)
• QR Code
• Data Matrix
• Aztec ('beta' quality)
• PDF 417 ('alpha' quality)

ZXingObjC currently has feature parity with ZXing version 3.0.

Usage

Encoding:

NSError error;
var writer = new ZXMultiFormatWriter();
var result = writer.Format(
    contents: "A string to encode",
    format: ZXBarcodeFormat.QRCode,
    width: 500,
    height: 500,
    error: out error
);

if (result != null)
{
    var image = ZXImage.ImageWithMatrix(result).Cgimage;
}
else
{
    var errorMessage = error.LocalizedDescription;
}

Decoding:

var source = new ZXCGImageLuminanceSource(imageToDecode);
var bitmap = ZXBinaryBitmap.BinaryBitmapWithBinarizer(ZXHybridBinarizer.BinarizerWithSource(source));

NSError error;

// There are a number of hints we can give to the reader, including
// possible formats, allowed lengths, and the string encoding.
var hints = new ZXDecodeHints();

var reader = new ZXMultiFormatReader();
var result = reader.Decode(image: bitmap, hints: hints, error: out error);

if (result != null)
{
    // The coded result as a string. The raw data can be accessed with
    // result.rawBytes and result.length.
    var text = result.Text;
    var format = result.BarcodeFormat;
    Console.WriteLine($"scanned code with format {format} and content {text}");

    return text;
}
else
{
    // Use error to determine why we didn't get a result, such as a barcode
    // not being found, an invalid checksum, or a format inconsistency.
    return null;
}

License

ZXingObjC is available under the Apache 2.0 license.