Is Objective C Apple specific?

Is Objective C an Apple 开发者_如何学Golanguage or can you run Objective C on other platforms like linux?

Objective-C is not an OS X/iOS specific language, eg. the GCC has its own, non Apple, ObjC runtime that also works on Linux (not sure about LLVM, but I guess they have their own runtime too).

However, the complete library (Cocoa, UIkit, etc) are Apple only. You will have to write your own NSObject and all subclasses if you want to use them (or use the GNUStep library for this).

You can run it on Linux using GNUStep and GCC as the compiler. By the way you will not be able to use a full Cocoa environment as a framework. Have a look at this compatibility list of AppKit

While it's that the language can be compiled and run on multiple other platforms (as others have said), in practice it's almost exclusively used for Mac OS X and iOS development.

Also checkout Cocotron.