General view settings in iOS app?

Question

iOS

There are for example 10 windows in the application. Everywhere set the same background, font size and the like. If you need to increase the font or replace the background, will you have to make changes in all ten windows, or can these settings be moved to a separate file, and then connected everywhere?

Answer 1

Make a separate class of type Constants
and write methods in it that return color, font, etc.

Answer 2

Make your extensions for static things and enjoy life :)

extension UIColor {
    class func ptm_black() -> UIColor {
        return UIColor ( red: 0.0895, green: 0.0895, blue: 0.0895, alpha: 1.0 )
    }
    class func ptm_grey() -> UIColor {
        return UIColor ( red: 0.8115, green: 0.8115, blue: 0.8115, alpha: 1.0 )
    }
    class func ptm_brown() -> UIColor {
        return UIColor ( red: 0.4042, green: 0.2848, blue: 0.2091, alpha: 1.0 )
    }
    class func ptm_green() -> UIColor {
        return UIColor ( red: 0.3137, green: 0.6824, blue: 0.3333, alpha: 1.0 )
    }
    class func ptm_red() -> UIColor {
        return UIColor ( red: 0.9381, green: 0.1339, blue: 0.1453, alpha: 1.0 )
    }
    class func ptm_gold() -> UIColor {
        return UIColor ( red: 0.9457, green: 0.7034, blue: 0.0621, alpha: 1.0 )
    }
}

Answer 3

That's right : take out the settings separately.
Avoid code/action duplication.