Hi I'm trying to develop an iOS app using libpd.

Is it possible to save any changes in a patch by coding in Xcode?

I've tried using array and [;pd-file.pd menusave( but it didn't work through the iOS simulator in Xcode.

It would be nice to make user savable presets inside pd patch since I'm a newbie in Xcode.

Can anybody suggest me a solution?

Do you mean that you'd like a way to store variables - so that they remain or have the ability to save presets - between launches of the program? You might want to use a flat-file like XML (I guess .plist is more apple-y), or even a database like sqlite. http://stackoverflow.com/questions/640885/best-cocoa-objective-c-wrapper-library-for-sqlite-on-iphone

Yes, I would like to make preset slots so that users could save/load parameter values in the patch. So, isn't there anyway to just simply save pd patch in libpd? As a newbie in iOS development, It would be a lot easier for me to use state saving module or arrays to make this work.