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This Xcode 4 project is put together as a template to create 2D QR and 1D barcodes from your iPhone project. This project wraps c code found here: http://rubyforge.org/projects/rqr/ . To build your own project from this template you must attace the libz.dylib library to your target in Xcode. You must also drag the QRDraw and libpng folder files into your project. Update the Header Search path to look in the libpng folder in your target build settings menu.