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March 12, 2019 02:37
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UIColor extension for HexColor
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extension UIColor { | |
convenience init(hex string: String, alpha: CGFloat) { | |
let hex = string.replacingOccurrences(of: "#", with: "") | |
let scanner = Scanner(string: hex) | |
var color: UInt32 = 0 | |
if scanner.scanHexInt32(&color) { | |
let r = CGFloat((color & 0xFF0000) >> 16) / 255.0 | |
let g = CGFloat((color & 0x00FF00) >> 8) / 255.0 | |
let b = CGFloat(color & 0x0000FF) / 255.0 | |
self.init(red: r, green: g, blue: b, alpha: alpha) | |
} else { | |
self.init(white: 1.0, alpha: 1) | |
} | |
} | |
var hex: String { | |
var r: CGFloat = 0 | |
var g: CGFloat = 0 | |
var b: CGFloat = 0 | |
var a: CGFloat = 0 | |
getRed(&r, green: &g, blue: &b, alpha: &a) | |
let rgb = Int(r * 255) << 16 | Int(g * 255) << 8 | Int(b * 255) << 0 | |
return String(format: "#%06x", rgb).uppercased() | |
} | |
} |
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