GradientView manageable from Storyboard , iOS , IBDesignable

GradientView.swift

import UIKit

/// CREDIT: https://stackoverflow.com/a/40957338/2666902

/// GradientView is an IBDesignable Class. It will help you to put two gradient in a View
/// Even you can set whether the gradient will be put horizontally or vertically.
/// Instructions to use:
/// 1. set Class Name of the UIView to `GradientView` in storyboard (identity inspector)
/// 2. set specific colors/properties in attribute inspector
/// Now, you ready with Gradient. Run and See 👍
///
@IBDesignable
final class GradientView: UIView {
    @IBInspectable var startColor: UIColor = UIColor.clear
    @IBInspectable var endColor: UIColor = UIColor.clear
    @IBInspectable var isHorizontalGradient: Bool = true

    var gradient: CAGradientLayer?

    override func draw(_ rect: CGRect) {
        if let gradient = gradient {
            gradient.removeFromSuperlayer()
        }

        gradient = CAGradientLayer()
        gradient?.frame = bounds
        gradient?.colors = [startColor.cgColor, endColor.cgColor]
        gradient?.zPosition = -1

        // To know more about various gradient pattern checkout CAGradientLayer's doc
        if isHorizontalGradient {
            gradient?.startPoint = CGPoint(x: 0, y: 0.5)
            gradient?.endPoint = CGPoint(x: 1, y: 0.5)
        }

        if let gradient = gradient {
            layer.addSublayer(gradient)
        }
    }
}