how to set hex color value to navigation bar

Question

I am getting color value in response from webservice team like

"company_color_ses" = 373737;

How do I set this color to my navigation bar. Do I seprate string with 2 digits and set this color in R G B pattern. like R = 37 G = 37 B = 37. Or do anyone has any other solution?

Thanks

Answer 1

Use this extension of UIColor for hexcolor.

    extension UIColor {

        convenience init(hexString: String) {

            let hex = hexString.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
            var int = UInt32()
            Scanner(string: hex).scanHexInt32(&int)
            let a, r, g, b: UInt32
            switch hex.count {
            case 3: // RGB (12-bit)
                (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
            case 6: // RGB (24-bit)
                (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
            case 8: // ARGB (32-bit)
                (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
            default:
                (a, r, g, b) = (0, 0, 0, 0)
            }
            self.init(red: CGFloat(r) / 255, green: CGFloat(g) / 255, blue: CGFloat(b) / 255, alpha: CGFloat(a) / 255)
        }

        var toHex: String? {
            return toHex()
        }

        // MARK: - From UIColor to String
        func toHex(alpha: Bool = false) -> String? {
            guard let components = cgColor.components, components.count >= 3 else {
                return nil
            }

            let r = Float(components[0])
            let g = Float(components[1])
            let b = Float(components[2])
            var a = Float(1.0)

            if components.count >= 4 {
                a = Float(components[3])
            }

            if alpha {
                return String(format: "%02lX%02lX%02lX%02lX", lroundf(r * 255), lroundf(g * 255), lroundf(b * 255), lroundf(a * 255))
            } else {
                return String(format: "%02lX%02lX%02lX", lroundf(r * 255), lroundf(g * 255), lroundf(b * 255))
            }
        }
}

use it like below:

navigationController?.navigationBar.backgroundColor = UIColor(hexString: 373737)