Globally change navigation bar title color using appearance - IOS

//For Navigation BAR

  NSDictionary *text = [NSDictionary dictionaryWithObjectsAndKeys:[UIColor GreenColor], UITextAttributeTextColor, [UIColor whiteColor], UITextAttributeTextShadowColor, nil];

    [[UINavigationBar appearance] setTitleTextAttributes:text];



//For Navigation Item

   [[UIBarButtonItem appearance] setTitleTextAttributes:

     [NSDictionary dictionaryWithObjectsAndKeys:

      [UIColor colorWithRed:0.0/255.0 green:0.0/255.0 blue:0.0/255.0 alpha:1.0],

      UITextAttributeTextColor,

      [UIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0],

      UITextAttributeTextShadowColor,

      [NSValue valueWithUIOffset:UIOffsetMake(0, 1)],

      UITextAttributeTextShadowOffset,

      [UIFont fontWithName:@"Helvatica" size:0.0],

      UITextAttributeFont,

      nil]  forState:UIControlStateNormal];