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@bhrott
Created March 1, 2017 22:16
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Swift 3: Hex UIColor

Extension:

import Foundation
import UIKit

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.characters.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) = (255, 0, 0, 0)
        }
        self.init(red: CGFloat(r) / 255, green: CGFloat(g) / 255, blue: CGFloat(b) / 255, alpha: CGFloat(a) / 255)
    }
}

Usage:

var color = UIColor(hexString: "#000")
@Bashta
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Bashta commented Dec 14, 2017

Handy <3

@tpritc
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tpritc commented Jan 19, 2018

Thanks! In Swift 4 you can silence the warning about characters being depreciated by changing:

switch hex.characters.count {

to

switch hex.count {

Thanks again for this snippet! ❤️

@hocongviet
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Thanks!

@slavat
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slavat commented Mar 28, 2019

Thanks!

@over140
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over140 commented Aug 26, 2019

Thanks!

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