iOS 및 Platform의 구분 체크

#include <sys/sysctl.h>

+ (NSString *) platform {
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);

    NSString *platform = [NSString stringWithUTF8String:machine];
    free(machine);
   
    return platform;
}

※ Return Value
Possible values:
     "i386" = iPhone Simulator
     "iPhone1,1" = iPhone 1G
     "iPhone1,2" = iPhone 3G
     "iPhone2,1" = iPhone 3GS
     "iPhone3,1" = iPhone 4
     "iPod1,1"   = iPod touch 1G
     "iPod2,1"   = iPod touch 2G
     "iPod3,1"   = iPod touch 3G