http://www.atmarkit.co.jp/fcoding/articles/objc/05/objc05a.html

gistfile1.h

  // NSDictionaryをループする
  NSDictionary *dict =
    [NSDictionary dictionaryWithObjectsAndKeys:
      @"futaba", @"name", [NSNumber numberWithInt:4], @"age",
      @"white", @"color", nil];
  NSArray *keys = [dict allKeys];
  for (i = 0; i < [keys count]; i++) {
    NSLog(@"key: %@, value: %@\n",
          [keys objectAtIndex:i],
          [dict objectForKey:[keys objectAtIndex:i]]);
  }