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March 25, 2024 06:17
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Color+Ext
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// | |
// Color+Ext.swift | |
// YourApp | |
// | |
// Created by Eugene Kovs on 06.03.2024. | |
// https://github.com/kovs705 | |
// | |
import SwiftUI | |
extension Color { | |
/// Get color programmatically from Hex in String format | |
/// - Parameter hex: HEX color: example "#FFFFFF" (white 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) = (255, 0, 0, 0) | |
} | |
self.init( | |
.sRGB, | |
red: Double(r) / 255, | |
green: Double(g) / 255, | |
blue: Double(b) / 255, | |
opacity: Double(a) / 255 | |
) | |
} | |
} | |
extension UIColor { | |
// Usage: | |
/* | |
color.adjust(-30) // 30% darker color | |
color.adjust(30) // 30% lighter color | |
color.lighter(30) // returns lighter color by 30% | |
color.darker(30) // returns darker color by 30% | |
*/ | |
// | |
func lighter(by percentage: CGFloat = 30.0) -> UIColor? { | |
return self.adjust(by: abs(percentage) ) | |
} | |
func darker(by percentage: CGFloat = 30.0) -> UIColor? { | |
return self.adjust(by: -1 * abs(percentage) ) | |
} | |
func adjust(by percentage: CGFloat = 30.0) -> UIColor? { | |
var red: CGFloat = 0, green: CGFloat = 0, blue: CGFloat = 0, alpha: CGFloat = 0 | |
if self.getRed(&red, green: &green, blue: &blue, alpha: &alpha) { | |
return UIColor(red: min(red + percentage/100, 1.0), | |
green: min(green + percentage/100, 1.0), | |
blue: min(blue + percentage/100, 1.0), | |
alpha: alpha) | |
} else { | |
return nil | |
} | |
} | |
} |
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