Use Hex code to color string Swift

In Swift, to color string we use.

label.textColor = UIColor.blueColor()

This way just has some base color, put cursor after dot at UIColor. And press Ctrl+Space bar to see colors drop down from list. Not many color to use.

If want another color, we can use RGB like this.

label.textColor =UIColor(red: 1, green: 0.4, blue: 1, alpha: 1)

This way not easy to use, if we want to use Hex code color like "#a1caf1", use function below.

func hex (hex:String) -> UIColor {

        var cString:String = hex.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet() as NSCharacterSet).uppercaseString

       

        if (cString.hasPrefix("#")) {

            cString = cString.substringFromIndex(cString.startIndex.advancedBy(1))

        }

       

        if ((cString.characters.count) != 6) {

            return UIColor.grayColor()

        }

       

        var rgbValue:UInt32 = 0

        NSScanner(string: cString).scanHexInt(&rgbValue)

       

        return UIColor(

            red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,

            green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,

            blue: CGFloat(rgbValue & 0x0000FF) / 255.0,

            alpha: CGFloat(1.0)

        )

    }

When want to color something, call it like this.

view.backgroundColor = hex("#a1caf1")