I don\'t have the Mac machine for ios development. Now I am in a learning stage and want to start the ios development on Linux. So is it possible to run the Objective-C Code on
Sure. LLVM/Clang is available as a package for most Linux distributions and is a great environment for learning Objective-C.
However, you're going to hit a wall very quickly. Namely, the iOS (or OS X) development stack -- the frameworks, APIs, and tools -- aren't available for Linux and, thus, you're out of luck the moment you want to do anything graphical.
There are projects -- GNUStep, Cocotron -- that are an implementation of a Cocoa-like set of APIs (derived directly from OpenStep) and those are great to learn, but you still won't be writing real iOS / OS X apps.