Created
April 15, 2019 01:52
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UIColor Utilities
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import UIKit | |
extension UIColor { | |
// Returns RGB(A) UIColor value from hexidecimal String representation | |
// Example: let blueColor = UIColor(hexString: "006699") | |
convenience init(hexString: String, alpha: CGFloat = 1.0) { | |
let hexString = hexString.trimmingCharacters(in: .whitespacesAndNewlines) | |
let scanner = Scanner(string: hexString) | |
if hexString.hasPrefix("#") { | |
scanner.scanLocation = 1 | |
} | |
var color: UInt32 = 0 | |
scanner.scanHexInt32(&color) | |
let mask = 0x000000FF | |
let r = Int(color >> 16) & mask | |
let g = Int(color >> 8) & mask | |
let b = Int(color) & mask | |
let red = CGFloat(r) / 255.0 | |
let green = CGFloat(g) / 255.0 | |
let blue = CGFloat(b) / 255.0 | |
self.init(red: red, green: green, blue: blue, alpha: alpha) | |
} | |
var hexString: 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 = (Int)(r*255)<<16 | (Int)(g*255)<<8 | (Int)(b*255)<<0 | |
return String(format: "#%06x", rgb) | |
} | |
} |
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