I have an existing project. I just like to ask if it is possible to convert it to a framework? I have tried searching but I cannot find any tutorial on how to do it.
For such a useful feature it baffles me that Apple has left this feature out of user's hands, unfortunately Apple in their wisdom has deemed that only OSX would get the framework treatment.
iOS frameworks are effectively packaged static libraries which follow a defined structure that XCode recognises - and hence the need for build script (as in Ray's guide) as this doesn't exist in XCode.
Depending on your mileage with XCode (and shell scripts) and it's peculiarities this project is one saving grace. ios universal framework. You do have to know what you are doing, as it works in only a majority of cases - you may fall into the other 10%.
The documentation could do with an improvement, but the real cruft of the help is here. You do have to install the 'real' and/or 'fake' frameworks, create an initial framework from the templates installed and copy over your files.