How to set Navigation Bar font style and font through out application in iOS

    in App delegate

    [[UINavigationBar appearance] setTitleTextAttributes:

     [NSDictionary dictionaryWithObjectsAndKeys:

      

      [UIColor blueColor], UITextAttributeTextColor,

      

       [UIColor greenColor], UITextAttributeTextShadowColor,

      

      [NSValue valueWithUIOffset:UIOffsetMake(-3, 3)], UITextAttributeTextShadowOffset,

      

      [UIFont fontWithName:@"Futura-CondensedMedium" size:20.0], UITextAttributeFont,

      

      nil]];