UIBlurEffect for underlaying view. NEED: presentation: Over Current Context

ViewController.swift

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let visuaEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .Light))
        visuaEffectView.frame = view.bounds
        
        view.backgroundColor = UIColor.clearColor()
        view.opaque = false
        view.insertSubview(visuaEffectView, atIndex: 0)
    }