Gradient View in Swift

Will write a really simple way to make a gradient UIView. You can specify GradientView in Stroyboard, then you can modify the UI settings.

import UIKit

@IBDesignable
class GradientView: UIView {

    @IBInspectable var cornerRadius: Double {
        get {
            return Double(self.layer.cornerRadius)
        }set {
            self.layer.cornerRadius = CGFloat(newValue)
        }
    }
    @IBInspectable var borderWidth: Double {
        get {
            return Double(self.layer.borderWidth)
        }
        set {
            self.layer.borderWidth = CGFloat(newValue)
        }
    }
    @IBInspectable var borderColor: UIColor? {
        get {
            return UIColor(cgColor: self.layer.borderColor!)
        }
        set {
            self.layer.borderColor = newValue?.cgColor
        }
    }
    @IBInspectable var shadowColor: UIColor? {
        get {
            return UIColor(cgColor: self.layer.shadowColor!)
        }
        set {
            self.layer.shadowColor = newValue?.cgColor
        }
    }
    @IBInspectable var shadowOpacity: Float {
        get {
            return self.layer.shadowOpacity
        }
        set {
            self.layer.shadowOpacity = newValue
        }
    }

    @IBInspectable var startColor:   UIColor = UIColor.black { didSet { updateColors() }}
    @IBInspectable var endColor:     UIColor = UIColor.white { didSet { updateColors() }}
    @IBInspectable var startLocation: Double =   0.05 { didSet { updateLocations() }}
    @IBInspectable var endLocation:   Double =   0.95 { didSet { updateLocations() }}
    @IBInspectable var horizontalMode:  Bool =  false { didSet { updatePoints() }}
    @IBInspectable var diagonalMode:    Bool =  false { didSet { updatePoints() }}

    override public class var layerClass: AnyClass { return CAGradientLayer.self }

    var gradientLayer: CAGradientLayer { return layer as! CAGradientLayer }

    func updatePoints() {
        if horizontalMode {
            gradientLayer.startPoint = diagonalMode ? CGPoint(x: 1, y: 0) : CGPoint(x: 0, y: 0.5)
            gradientLayer.endPoint   = diagonalMode ? CGPoint(x: 0, y: 1) : CGPoint(x: 1, y: 0.5)
        } else {
            gradientLayer.startPoint = diagonalMode ? CGPoint(x: 0, y: 0) : CGPoint(x: 0.5, y: 0)
            gradientLayer.endPoint   = diagonalMode ? CGPoint(x: 1, y: 1) : CGPoint(x: 0.5, y: 1)
        }
    }
    func updateLocations() {
        gradientLayer.locations = [startLocation as NSNumber, endLocation as NSNumber]
    }
    func updateColors() {
        gradientLayer.colors    = [startColor.cgColor, endColor.cgColor]
    }

    override public func layoutSubviews() {
        super.layoutSubviews()
        updatePoints()
        updateLocations()
        updateColors()
    }
}