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Swift: Extend Color.init to support hex colors
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// From SO answer: https://stackoverflow.com/a/56874327/1492782 | |
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 | |
) | |
} | |
} |
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