title: How to prevent Large Title from Collapsing
body: <p>The question is simple, how can I prevent a Large Title Navigation Bar from collapse when a scrollview scrolls down?</p>
  
  <p>My navigation must have a large navigation bar at all times... so when a scrollview scroll, the navigation bar shouldn't collapse up, it should stay the same size, how can I do that?</p>
  
  <p>This is how I set the largeTitle preferences</p>
  
  <pre><code>override func viewWillAppear(_ animated: Bool) {
      super.viewWillAppear(animated)
      self.navigationItem.hidesBackButton = true
      presenter.expandForSimulatorLayoutIfNeeded()
  
  }
  
  
  func expandForSimulatorLayoutIfNeeded(){
              if !isExpanded{
          topMenu = TopMenu(frame: expandedNavigationFrame, interactor: interactor)
          oldNavigationBarFrame = navigationBar.frame
          self.navigationBar.addSubview(topMenu)
      }
  
      if #available(iOS 11.0, *) {
          self.navigationBar.prefersLargeTitles = true
      } else {
          self.navigationBar.frame = expandedNavigationFrame
      }
  
      let topConstraint = NSLayoutConstraint(item: topMenu, attribute: .top, relatedBy: .equal, toItem: navigationBar, attribute: .top, multiplier: 1, constant: 0)
      let leadingConstraint = NSLayoutConstraint(item: topMenu, attribute: .leading, relatedBy: .equal, toItem: navigationBar, attribute: .leading, multiplier: 1, constant: 0)
      let widthConstraint = NSLayoutConstraint(item: topMenu, attribute: .width, relatedBy: .equal, toItem: self.navigationBar, attribute: .width, multiplier: 1, constant: 0)
      let bottomConstraint = NSLayoutConstraint(item: topMenu, attribute: .bottom, relatedBy: .equal, toItem: navigationBar, attribute: .bottom, multiplier: 1, constant: 0)
      topMenu.translatesAutoresizingMaskIntoConstraints = false
      NSLayoutConstraint.activate([leadingConstraint, widthConstraint, topConstraint, bottomConstraint])
  
  }
  </code></pre>