Add blur effect on a UIView with blurRadius

UIView+BlurRadius.swift

//
//  UIView+BlurRadius.swift
//  PrecisionSystem
//
//  Created by Siempay on 3/27/20.
//  Copyright © 2020 Brahim ELMSSILHA. All rights reserved.
//

import Foundation


extension UIView {

	/// Add UIBlurEffect on top of this view
	///
	/// This helper add a blur effect with possibility
	/// of reducing the amount (radius) of the blur effect.
	///
	/// By using default parameters: you will get the half amount
	/// of blur effect you normaly get.
	///
	/// - Parameters:
	///   - style: blur style: .dark, .light ...
	///   - radius: from 0 mean nothing to 1 means normal blur
	func addBlurEffect(style: UIBlurEffect.Style = .dark, radius: Double = 0.5) {

		// create new blur effect and added as subView
		let blurEffect = UIBlurEffect(style: style)
		let blurEffectView = UIVisualEffectView()
		addSubview(blurEffectView)

		// always fill the view
		blurEffectView.frame = self.bounds
		blurEffectView.autoresizingMask = [.flexibleWidth, .flexibleHeight]

		// make the blur being with animation
		// then pausing the animation 
		UIView.animate(withDuration: 1) {
			blurEffectView.effect = blurEffect
		}
		blurEffectView.pauseAnimation(delay: radius)
	}
}