Separate storyboard for iPhone 5

iPhone5-Storyboard

CGSize iOSDeviceScreenSize = [[UIScreen mainScreen] bounds].size;
 
if (iOSDeviceScreenSize.height == 480){   
  UIStoryboard *iPhone35Storyboard = [UIStoryboard storyboardWithName:@"Storyboard_iPhone4" bundle:nil];
  UIViewController *initialViewController = [iPhone35Storyboard instantiateInitialViewController];
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  self.window.rootViewController  = initialViewController;
}
if (iOSDeviceScreenSize.height == 568){   // iPhone 5
  UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:@"Storyboard_iPhone5" bundle:nil];
  UIViewController *initialViewController = [iPhone4Storyboard instantiateInitialViewController];
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  self.window.rootViewController  = initialViewController;
}
[self.window makeKeyAndVisible];