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
• Code 128
• ITF
• Codabar
• RSS-14 (all variants)
• QR Code
• Data Matrix
• Maxicode
• Aztec ('beta' quality)
• PDF 417 ('beta' quality)

ZXingObjC currently has feature parity with ZXing version 3.3.3.

Requirements

ZXingObjC requires Xcode 8.3.3 and above, targeting either iOS 8.0 and above, or Mac OS X 10.8 Mountain Lion and above.

Usage

Encoding:

NSError *error = nil;
ZXMultiFormatWriter *writer = [ZXMultiFormatWriter writer];
ZXBitMatrix* result = [writer encode:@"A string to encode"
                              format:kBarcodeFormatQRCode
                               width:500
                              height:500
                               error:&error];
if (result) {
  CGImageRef image = CGImageRetain([[ZXImage imageWithMatrix:result] cgimage]);

  // This CGImageRef image can be placed in a UIImage, NSImage, or written to a file.
  
  CGImageRelease(image);
} else {
  NSString *errorMessage = [error localizedDescription];
}

Decoding:

CGImageRef imageToDecode;  // Given a CGImage in which we are looking for barcodes

ZXLuminanceSource *source = [[[ZXCGImageLuminanceSource alloc] initWithCGImage:imageToDecode] autorelease];
ZXBinaryBitmap *bitmap = [ZXBinaryBitmap binaryBitmapWithBinarizer:[ZXHybridBinarizer binarizerWithSource:source]];

NSError *error = nil;

// There are a number of hints we can give to the reader, including
// possible formats, allowed lengths, and the string encoding.
ZXDecodeHints *hints = [ZXDecodeHints hints];

ZXMultiFormatReader *reader = [ZXMultiFormatReader reader];
ZXResult *result = [reader decode:bitmap
                            hints:hints
                            error:&error];
if (result) {
  // The coded result as a string. The raw data can be accessed with
  // result.rawBytes and result.length.
  NSString *contents = result.text;

  // The barcode format, such as a QR code or UPC-A
  ZXBarcodeFormat format = result.barcodeFormat;
} 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.
}

Installation

We highly recommend Carthage as module manager.

Carthage

ZXingObjC can be installed using Carthage. After installing Carthage just add ZXingObjC to your Cartfile:

github "TheLevelUp/ZXingObjC" ~> 3.6

CocoaPods

CocoaPods is a dependency manager for Swift and Objective-C Cocoa projects. After installing CocoaPods add ZXingObjC to your Podfile:

platform :ios, '8.0'
pod 'ZXingObjC', '~> 3.6.1'

Examples

ZXingObjC includes several example applications found in "examples" folder:

• BarcodeScanner - An iOS application that captures video from the camera, scans for barcodes and displays results on screen.
• BarcodeScannerSwift - An iOS application that captures video from the camera, scans for barcodes and displays results on screen, completely rewritten in Swift.

Kudos

• cwalcott initial creator of this project
• neacao for his unparalleled support lately

License

ZXingObjC is available under the Apache 2.0 license.