Use Hex color in SwiftUI

Question

in UIKit we could use an Extension to set hex color to almost everything. https://www.hackingwithswift.com/example-code/uicolor/how-to-convert-a-hex-color-to-a-uicolor

but when I'm trying to do it on SwiftUI, it's not possible, it looks like the SwiftUI does not get the UIColor as parameter.

    Text(text)         .color(UIColor.init(hex: "FFF")) 

error message:

Cannot convert value of type 'UIColor' to expected argument type 'Color?' 

I even tried to make an extension for Color, instead of UIColor, but I haven't any luck

my extension for Color:

import SwiftUI

extension Color {     init(hex: String) {         let scanner = Scanner(string: hex)         scanner.scanLocation = 0         var rgbValue: UInt64 = 0         scanner.scanHexInt64(&rgbValue)          let r = (rgbValue & 0xff0000) >> 16         let g = (rgbValue & 0xff00) >> 8         let b = rgbValue & 0xff          self.init(             red: CGFloat(r) / 0xff,             green: CGFloat(g) / 0xff,             blue: CGFloat(b) / 0xff, alpha: 1         )     } } 

error message:

Incorrect argument labels in call (have 'red:green:blue:alpha:', expected '_:red:green:blue:opacity:') 

Answer 1

You're almost there, you were using the wrong initialiser parameter:

extension Color {     init(hex: String) {         let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)         var int: UInt64 = 0         Scanner(string: hex).scanHexInt64(&int)         let a, r, g, b: UInt64         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) = (1, 1, 1, 0)         }          self.init(             .sRGB,             red: Double(r) / 255,             green: Double(g) / 255,             blue:  Double(b) / 255,             opacity: Double(a) / 255         )     } } 

Answer 2

Another alternative below that uses Int for hex but of course, it can be changed to String if you prefer that.

extension Color {     init(hex: UInt, alpha: Double = 1) {         self.init(             .sRGB,             red: Double((hex >> 16) & 0xff) / 255,             green: Double((hex >> 08) & 0xff) / 255,             blue: Double((hex >> 00) & 0xff) / 255,             opacity: alpha         )     } } 

Usage examples:

Color(hex: 0x000000) Color(hex: 0x000000, alpha: 0.2)