BlurryVC.swift

import UIKit

class BlurryVC: UIViewController {
    override func loadView() {
        view = UIVisualEffectView(effect: UIBlurEffect(style: .Light))
    }
}

class ViewController: UIViewController {

    override func loadView() {
        let label = UILabel()
        label.text = "sldkjfhaskjdhfkjasdhfkjhasdkfjhasdkj fka dsfh askjdhf askjdhf kjashdf kjashdfkj hkajsdfh askjd"
        label.numberOfLines = 0
        label.textColor = UIColor.redColor()
        label.font = UIFont.boldSystemFontOfSize(30)
        view = label
    }

    override func viewDidAppear(animated: Bool) {
        let dt = 2 * Int64(NSEC_PER_SEC)
        let t = dispatch_time(DISPATCH_TIME_NOW, dt)

        dispatch_after(t, dispatch_get_main_queue()) {
            let vc = BlurryVC()
            vc.modalPresentationStyle = .OverFullScreen
            self.presentViewController(vc, animated: true, completion: nil)
        }
    }
}