CocoaOniguruma is an Objective-C binding of Oniguruma regular expression engine. It's simple and tiny compared to the other bindings. It works well on Mac OS X and iPhone. CocoaOniguruma is provided as assorted source files primarily. Follow the steps to use CocoaOniguruma in your project. Copy "core" directory into your project directory with name "CocoaOniguruma". Open your project by Xcode. Add