Only update view constraints when the view has been added to the view…

… hierarchy in AboutViewController

4champ/Scenes/About/AboutViewController.swift

@@ -71,13 +71,16 @@ class AboutViewController: UIViewController, AboutDisplayLogic {
  UIUtils.roundCornersInView(tableView)
  navigationItem.title = "AboutView_Title".l13n().uppercased()
 
- toggleNowPlaying(modulePlayer.status.rawValue > PlayerStatus.stopped.rawValue)
-
  let img = UIImage(named: "favestar-grey")?.withRenderingMode(.alwaysTemplate)
  let buttonItem = UIBarButtonItem.init(image: img, landscapeImagePhone: img, style: .plain, target: self, action: #selector(reviewNow))
  self.navigationItem.leftBarButtonItem = buttonItem
  }
 
+ override func viewDidAppear(_ animated: Bool) {
+ super.viewDidAppear(animated)
+ toggleNowPlaying(modulePlayer.status.rawValue > PlayerStatus.stopped.rawValue)
+ }
+
  // MARK: Display Logic
  func displayNowPlaying(_ viewModel: About.Status.ViewModel) {
  }
@@ -88,12 +91,14 @@ class AboutViewController: UIViewController, AboutDisplayLogic {
 }
 
 extension AboutViewController: NowPlayingContainer {
+
  func toggleNowPlaying(_ value: Bool) {
+ guard view.window != nil else { return }
  log.debug("")
-  if value {
-  bottomAnchor?.constant = -(50.0 + 10.0)
-  } else {
-  bottomAnchor?.constant = -10.0
+ if value {
+ bottomAnchor?.constant = -(50.0 + 10.0)
+ } else {
+ bottomAnchor?.constant = -10.0
  }
  view.layoutIfNeeded()
  }