swift uicolor from hex

extension UIColor { convenience init(hexaString: String, alpha: CGFloat = 1) { let chars = Array(hexaString.dropFirst()) self.init(red: .init(strtoul(String(chars[0...1]),nil,16))/255, green: .init(strtoul(String(chars[2...3]),nil,16))/255, blue: .init(strtoul(String(chars[4...5]),nil,16))/255, alpha: alpha)} } let redColor = UIColor(hexaString: "#FF0000") // r 1,0 g 0,0 b 0,0 a 1,0 let transparentRed = UIColor(hexaString: "#FF0000", alpha: 0.5) // r 1,0 g 0,0 b 0,0 a 0,5

swift hex color

//https://stackoverflow.com/questions/24263007/how-to-use-hex-color-values
var color1 = hexStringToUIColor("#d3d3d3")

//Create Func
func hexStringToUIColor (hex:String) -> UIColor {
    var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()

    if (cString.hasPrefix("#")) {
        cString.remove(at: cString.startIndex)
    }

    if ((cString.count) != 6) {
        return UIColor.gray
    }

    var rgbValue:UInt64 = 0
    Scanner(string: cString).scanHexInt64(&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)
    )
}

Posted by: Guest on February-13-2021

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