Blur animator

CellBlurAnimator.swift

fileprivate var propertyAnimator: UIViewPropertyAnimator!
fileprivate var blurEffectView: UIVisualEffectView!
fileprivate var backGradientView: UIView!

func addWorkoutBlur() {
    if !UIAccessibilityIsReduceTransparencyEnabled() {
        if blurEffectView != nil {
            blurEffectView.removeFromSuperview()
        }
        if backGradientView != nil {
            backGradientView.removeFromSuperview()
        }
        if propertyAnimator != nil {
            propertyAnimator.stopAnimation(true)
        }
        
        backGradientView = UIView(frame: self.bounds)
        backGradientView.backgroundColor = UIColor.init(hexString: "#dae1e3")?.withAlphaComponent(0.7)
        self.cornerView.addSubview(backGradientView)
        
        let blurEffect = UIBlurEffect(style: .regular)
        blurEffectView = UIVisualEffectView(effect: blurEffect)
        
        blurEffectView.frame = self.bounds
        self.foreImageView.addSubview(blurEffectView)
        propertyAnimator = UIViewPropertyAnimator.init(duration: 3.0, curve: .linear) {[weak self] in
            self?.blurEffectView.effect = nil
        }
        propertyAnimator.fractionComplete = 0.7
    }
}