Objective-c Study Notes-Ubuntu environment setup + HelloWorld

I have always wanted to learn about IOS Mobile Phone development. Today I am involved in this field. Well, start with the basics -- Build the development environment.

System: Ubuntu 12.04 LTS 64-bit

Environment setup steps:

1. Install the Compiler

 sudo apt-get install gnustep*

2. Configure Environment Variables

# set GNUstepGNUSTEP_ROOT=/usr/share/GNUstep/Makefilesexport GNUSTEP_ROOTsource /usr/share/GNUstep/Makefiles/GNUstep.sh

3. Compile HelloWorld test and installation environment hello. m

#import 
 
  int main(int argc , const char * argv[]){        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];        NSLog(@"Hello World! \n");        [pool drain];        return 0;}
 

4. Compile the GNUMakefile file (in the same directory as the hello. m file)

include $(GNUSTEP_ROOT)/common.makeTOOL_NAME = HelloWorldHelloWorld_OBJC_FILES = hello.minclude $(GNUSTEP_ROOT)/tool.make

Remember that the settings in GNUSTEP_ROOT and environment variables are consistent.

Make

There is an executable file HelloWorld In the obj directory and the file output is:

./obj/HelloWorld2014-05-04 07:07:35.340 HelloWorld[15727] Hello World!