Set Font For Bar Button item

UIBarButtonItem *facebook=[[UIBarButtonItem alloc] initWithTitle:@"FB" style:UIBarButtonItemStylePlain target:self action:@selector(postInFb:)];
[facebook setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                     [UIFont fontWithName:@"icomoon" size:30], NSFontAttributeName,
                                     [UIColor colorWithRed:68.0/255.0 green:85.0/255.0 blue:153.0/255.0 alpha:1], NSForegroundColorAttributeName,
                                     nil]
                           forState:UIControlStateNormal];