Create a UIColor from a hex string

UIColor+Hex.swift

//
//  UIColor+Hex.swift
//
//  Created by Edward Majcher on 6/27/16.
//
//

import Foundation

extension UIColor {

    convenience init(hex: String) {
        let rgb = UIColor.rgb(hex: hex)
        self.init(red: rgb.red, green: rgb.green, blue: rgb.blue, alpha: 1.0)
    }
    
    static func rgb(hex hex:String) -> (red: CGFloat, green: CGFloat, blue: CGFloat) {
        let scanner = NSScanner(string: hex)
        
        var scanStart = 0
        
        if let range = hex.rangeOfString("#") {
            scanStart = hex.startIndex.distanceTo(range.startIndex) + 1
        }
        
        scanner.scanLocation = scanStart
        
        var hexInt: UInt32 = 0
        
        if !scanner.scanHexInt(&hexInt) {
            return (red: 0, green: 0, blue: 0)
        }
        
        let red = CGFloat((hexInt & 0xFF0000) >> 16) / 255.0
        let green = CGFloat((hexInt & 0xFF00) >> 8) / 255.0
        let blue = CGFloat(hexInt & 0xFF) / 255.0
        
        return (red, green, blue)
    }
    
}