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 About me:
Hi. My name is Farooq Kaiser and I'm a software developer from Toronto, Canada.

iphone Hello World in Objective C

by Farooq Kaiser 28. June 2009 03:45
As i have mentioned in my previouse article that All iPhone development is done in objective-c. 
Today i will start with a simple program using command line.

$ cat helloworld.h
 
1- #import <Foundation/Foundation.h>  
 
2- int main (int argc, const char *argv[])
3- {
4-      NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
5-      NSLog (@"Hello World!");
6-      [pool drain];
7-      return 0;
8- }
  
compiling and running:
 
$ gcc -framework Foundation helloworld.m
$ ./a.out
 
Hello World!
 
Now we will understand the above code. Line numbers are for reference.  

Line 1 include the base class 

Line 4 declared for memory management. Reserves space in memory.

Line 5 NSLog is a function that displays the argument you pass in.

Line 6 Release the allocated memory pool

Line 7 Terminate the execution of main.  

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iphone | Objective-C

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