Objective-C Environment Setup for Ubuntu-Linux
Yes, on Ubuntu you can run Objective-C code like this:
On Ubuntu, install the GNU Objective-C Compiler and Gnu-Step Development Libraries using the following command:
sudo apt-get –y install gobjc gnustep gnustep-devel;
Now enter the Program below and save the file with a .m extension.
For example, hello.m
// 'Hello World' Program in Objective-C
#import<Foundation/Foundation.h>
int main()
{
NSLog(@"Hello World..!\n");
return 0;
}
Now compile the program with the following command:
gcc hello.m `gnustep-config --objc-flags` `gnustep-config --base-libs`
Now run the executable with the following command:
./a.out
EXIT → 2014-11-14 15:47:32.628 a.out[2786] Hello World..!
The output format looks something like this:
<DATE> <TIME> <NAME OF THE EXECUTABLE[NUMBER]> <ACTUAL OUTPUT>
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Unfortunately, you need OS X on your computer to develop for iOS. An alternative is to create a virtual machine on your computer and install OS X and Xcode on it. I've heard that this solution is great for people if their computer can handle it.
More information on creating a "hackintosh" can be found here.
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Sure. LLVM / Clang is available as a package for most Linux distributions and provides a great environment for learning Objective-C.
However, you quickly hit the wall. Namely, the iOS (or OS X) development stack - frameworks, APIs, and tools - isn't available for Linux, and thus you're out of luck at the moment you want to do something graphical.
There are projects - GNUStep, Cocotron is an implementation of a set of Cocoa APIs sourced directly from OpenStep, which is great, but you still won't be writing real iOS / OS X.
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