Hi Lucia,
thank you very much for your email, and please excuse the delay in replying.
To use fuzzylite in iOS, you need to build the libraries using the proper target architecture. Please, take a look at https://code.google.com/p/ios-cmake/ to build using CMake. You need to generate the proper library for iOS. I think an alternative would be to include the sources of fuzzylite in your project and build the project, but I am not sure about this. It would be great and very appreciated if you posted some instructions once you build fuzzylite for iOS.
Cheers,
Juan.