Generate Random Number in a given range

TestViewController.h

#define RANDOM_SEED() srandom((unsigned)(mach_absolute_time() & 0xFFFFFFFF))
#define RANDOM_NUM() (random())

@interface TestViewController : UIViewController
...

TestViewController.m

#include <mach/mach_time.h>

@implementation TestViewController

-(int)getRandomNumber
  {


RANDOM_SEED();
int randomSelect=RANDOM_NUM()%([yourArray count]-1); // picks a random number in range 0 to count

return randomSelect;
}