🌫️ Blurred Status Bar View

BlurredStatusBarView.swift

//
//  BlurredStatusBarView.swift
//
//  Created by Filipp Fediakov on 23.11.17.
//  Copyright © 2017 filletofish. All rights reserved.
//

import UIKit

class BlurredStatusBarView: UIView {
  private var effectView: UIVisualEffectView

  init(style: UIBlurEffectStyle) {

    let width = UIScreen.main.bounds.width
    let height = UIApplication.shared.statusBarFrame.height

    let blurEffect = UIBlurEffect(style: .dark)
    effectView = UIVisualEffectView(effect: blurEffect)

    let vibrancyEffect = UIVibrancyEffect(blurEffect: blurEffect)
    let vibrancyView = UIVisualEffectView(effect: vibrancyEffect)

    super.init(frame: CGRect(x: 0, y: 0, width: width, height: height))

    effectView.frame = self.bounds
    vibrancyView.frame = self.bounds
    self.addSubview(effectView)
    self.addSubview(vibrancyView)

    NotificationCenter.default.addObserver(self,
                                           selector: #selector(statusBarDidRotated(_:)),
                                           name: NSNotification.Name.UIApplicationWillChangeStatusBarOrientation,
                                           object: nil)

    NotificationCenter.default.addObserver(self,
                                           selector: #selector(statusBarDidChangeFrame(_:)),
                                           name: NSNotification.Name.UIApplicationWillChangeStatusBarFrame,
                                           object: nil)
  }

  required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
  }

  @objc func statusBarDidRotated(_ notification: NSNotification) {
    guard let userInfo = notification.userInfo as? [String: Any] else { return }
    guard let rawOrientation = userInfo[UIApplicationStatusBarOrientationUserInfoKey] as? Int,
      let orientation = UIInterfaceOrientation(rawValue: rawOrientation) else {
      return
    }

    if orientation == .portrait || orientation == .portraitUpsideDown {
      UIView.animate(withDuration: 0.0, animations: { self.alpha = 1})
    } else {
      UIView.animate(withDuration: 0.0, animations: { self.alpha = 0})
    }
  }

  @objc func statusBarDidChangeFrame(_ notification: NSNotification) {
    guard let userInfo = notification.userInfo as? [String: Any] else { return }
    guard let frame = (userInfo[UIApplicationStatusBarFrameUserInfoKey] as? NSValue)?.cgRectValue else {
      return
    }
    UIView.animate(withDuration: 0.4, animations: {
      self.frame = CGRect(x: self.bounds.origin.x, y: self.bounds.origin.y,
                          width: frame.width, height: frame.height)
    })
  }
}