リファクタリングしても怖くないNibNameの指定方法

RootViewController* viewController;

NSString* nibName;

// 怖い書き方

nibName = @"RootViewController";

viewController = [[RootViewController alloc] initWithNibName:nibName bundle:nil];

// 怖くない書き方

nibName = [[RootViewController class] description];

/* または
  nibName = NSStringFromClass([RootViewController class]);
 */

viewController = [[RootViewController alloc] initWithNibName:nibName bundle:nil];

NSString* nibName1 = @"RootViewController";

NSString* nibName2 = [[RootViewController class] description];

if ([nibName1 isEqualToString:nibName2]) {

  NSLog(@"いっしょです");

}