Gradient background in Swift

BackgroundView.swift

//
//  BackgroundView.swift
//  Quiz
//
//  Created by Damien D on 09/09/2014.
//  Copyright (c) 2014 Damien D. All rights reserved.
//

import UIKit

class BackgroundView: UIView {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        backgroundColor = UIColor.whiteColor()
    }

    required init(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func drawRect(rect: CGRect) {
        let space: CGColorSpaceRef = CGColorSpaceCreateDeviceRGB()
        let colors: CFArray = [
            UIColor(hex: 0x085078).CGColor,
            UIColor(hex: 0x85D8CE).CGColor
        ]
        let locations: [CGFloat] = [0, 1]
        
        let gradient = CGGradientCreateWithColors(space, colors, locations)
        
        let currentContext = UIGraphicsGetCurrentContext()
        let startPoint = CGPointZero
        let endPoint = CGPointMake(frame.width, frame.height)
        
        CGContextDrawLinearGradient(currentContext, gradient, startPoint, endPoint, 0)
    }

}

UIColorExtensions.swift

//
//  UIColorExtensions.swift
//  Quiz
//
//  Created by Damien D on 09/09/2014.
//  Copyright (c) 2014 Damien D. All rights reserved.
//

import UIKit

extension UIColor {
    convenience init(hex: Int, alpha: CGFloat = 1) {
        let red   = CGFloat((hex & 0xFF0000) >> 16) / 255
        let green = CGFloat((hex & 0xFF00)  >> 8)  / 255
        let blue  = CGFloat((hex & 0xFF))         / 255
        self.init(red: red, green: green, blue: blue, alpha: alpha)
    }
}