ZXingObjC库 二维码相册扫描 ObjectiveC版本

ZXingObjC ========= ZXingObjC is a full Objective-C port of [ZXing](https://github.com/zxing/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 * Aztec ('beta' quality) * PDF 417 ('alpha' quality) ZXingObjC currently has feature parity with ZXing version 3.0. ## Requirements ZXingObjC requires Xcode 5, targeting either iOS 6.0 and above, or Mac OS X 10.8 Mountain Lion and above. ## Usage Encoding: ```objc 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 = [[ZXImage imageWithMatrix:result] cgimage]; // This CGImageRef image can be placed in a UIImage, NSImage, or written to a file. } else { NSString *errorMessage = [error localizedDescription]; } ``` Decoding: ```objc 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 The recommended way to install ZXingObjC is with [CocoaPods](http://cocoapods.org), a dependency mananger for Objective-C projects. After installing CocoaPods just add ZXingObjC to your Podfile: ```ruby platform :ios, '7.0' pod 'ZXingObjC', '~> 3.0' ``` ## 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. * BarcodeScannerOSX - An OS X application that captures video from the camera, scans for barcodes and displays results on screen. * QrCodeTest - A basic QR code generator that accepts input, encodes it as a QR code, and displays it on screen. ## License ZXingObjC is available under the [Apache 2.0 license](http://www.apache.org/licenses/LICENSE-2.0.html).