//first method
NSArray *array = [myIP componentsSeparatedByString:@"."];
for (int i=0; i < [array count]; i++) {
NSString *str1 = [array objectAtIndex:i];
printf("%s
", [str1 UTF8String]);
}

//separator
printf("//////////
");

//second method
s = myIP;
for (int i=0; i<=2; i++) {
range = [s rangeOfString:@"."];
s = [s stringByReplacingCharactersInRange:range withString:@"
"];
}

printf("%s", [s UTF8String]);

//separator
printf("//////////
");

//third method
NSString *str = [myIP stringByReplacingOccurrencesOfString:@"." withString:@"
"];

printf("%s", [str UTF8String]);