Random grey bar appears on top of ViewController in iOS (swift) - ios

Question

I am making an app currently and on the main screen where I load multiple items from Parse, I see a weird grey bar. I don't know where this bar came from as it does not show up on the storyboard and I don't know how to fix it. It never was a problem until it randomly recently showed up. Here is the code for that ViewController.
import UIKit
import Parse
import ParseUI
import Kingfisher
class HomeTableViewController: PFQueryTableViewController
{
override func viewDidLoad ()
{
super.viewDidLoad()
setTitle()
self.navigationController?.isNavigationBarHidden = true
self.navigationController?.navigationBar.setHeight(0.0)
// self.tableView.scrollsToTop = true
// self.tableView.scrollToNearestSelectedRow(at: UITableViewScrollPosition.bottom, animated: false)
// self.tableView.scrollToNearestSelectedRow(at: UITableViewScrollPosition.top, animated: true)
}
func setTitle()
{
var parentView = self.parent
while parent != nil
{
if let menu = parentView as? CucuMenuController
{
// menu.setTitleForLabel("Cucus")
menu.setTitleForLabel("")
break
}
parentView = parentView?.parent
}
}
var firstTime = true
var totalArticles = 0
let appDel = UIApplication.shared.delegate as! AppDelegate
required init!(coder aDecoder: NSCoder)
{
super.init(coder: aDecoder)
setupHomefeed()
}
func setupHomefeed()
{
// This runs before didFinishLoadingWithOptions
self.parseClassName = "Article"
self.pullToRefreshEnabled = true
self.paginationEnabled = true
self.objectsPerPage = 10
self.loadingViewEnabled = true
}
override func objectsDidLoad(_ error: Error?)
{
super.objectsDidLoad(error)
if firstTime
{
firstTime = false
self.loadObjects()
self.tableView.reloadData()
}
else
{
PFObject.pinAll(inBackground: self.objects)
}
}
override func numberOfSections(in tableView: UITableView) -> Int
{
return 1
}
override func viewDidAppear(_ animated: Bool)
{
navigationController?.isNavigationBarHidden = false
if PFUser.current() == nil || PFUser.current()!["name"] == nil
{
let viewController = storyboard!.instantiateViewController(withIdentifier: "LoginController")
UIApplication.shared.keyWindow?.rootViewController = viewController
}
else if UserDefaults.standard.bool(forKey: "showDemo")
{
self.performSegue(withIdentifier: "detailSegue", sender: self)
}
else
{
self.loadObjects()
}
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
if self.objects!.count < totalArticles && self.objects!.count > 0
{
return self.objects!.count + 1
}
return self.objects!.count
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
if indexPath.row == self.objects?.count
{
return 70.0
}
else
{
return 221.5
}
}
override func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return 0.0
}
override func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 0.0
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as UITableViewCell!
if indexPath.row == self.objects!.count
{
return tableView.dequeueReusableCell(withIdentifier: "loadCell") as UITableViewCell!
}
if (indexPath.row > self.objects!.count)
{
return cell!
}
let imageView = cell?.viewWithTag(200) as! UIImageView
let titleText = cell?.viewWithTag(101) as! UILabel
let timeLabel = cell?.viewWithTag(102) as! UILabel
let newImage = cell?.viewWithTag(100) as! UIImageView
let diffImage = cell?.viewWithTag(300) as! UIImageView
let scoreLabel = cell?.viewWithTag(301) as! UILabel
let catLabel = cell?.viewWithTag(103) as! UILabel
let article = Article(parseData: self.objects![indexPath.row])
titleText.text = article.title
timeLabel.text = article.duration
catLabel.text = article.category.uppercased()
let hasRead = UserController.hasReadArticle(article.objectId)
newImage.isHidden = hasRead
if hasRead
{
let score = UserController.getScoreForArticle(article.objectId)
scoreLabel.text = NSString(format: "YOUR SCORE: %.0f", score) as String
var performance = "hard"
if score >= article.idealScore { performance = "easy" }
else if score * 2 >= article.idealScore { performance = "medium" }
diffImage.image = UIImage(named: performance + "ScoreTag")
if UserController.getPlayableForArticle(article.objectId) {
cell?.isUserInteractionEnabled = true
}
}
else
{
scoreLabel.text = NSString(format: "AVG. SCORE: %.0f", article.idealScore) as String
diffImage.image = UIImage(named: article.difficulty.lowercased() + "ScoreTag")
}
//Image
let resource = ImageResource(downloadURL: article.getImageURL(), cacheKey: article.objectId)
imageView.kf.setImage(with: resource)
UIHelper.addShadowToHomeCell((cell?.viewWithTag(1)!)!)
return cell!
}
var selectedIndex = -1
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath)
{
if indexPath.row == self.objects!.count
{
self.loadNextPage()
}
else
{
selectedIndex = indexPath.row
self.performSegue(withIdentifier: "detailSegue", sender: self)
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?)
{
if segue.identifier == "detailSegue"
{
let dest = segue.destination as? ArticlePreviewViewController
if UserDefaults.standard.bool(forKey: "showDemo")
{
dest?.article = DemoArticle().article
}
else
{
dest?.article = Article(parseData: self.objects![selectedIndex])
}
}
NotificationCenter.default.post(name: Notification.Name(rawValue: "CUCU_START"), object: nil)
}
override func queryForTable() -> PFQuery<PFObject>
{
let q = PFQuery(className: "Article").whereKey("releaseDate", lessThanOrEqualTo: Date()).whereKey("validated", equalTo: true)
if firstTime
{
q.fromLocalDatastore()
}
else
{
let mods = PFQuery(className: "Question").whereKey("article", matchesQuery: q)
mods.findObjectsInBackground
{
(objects, err) -> Void in
PFObject.pinAll(inBackground: objects)
}
}
print(firstTime)
totalArticles = q.countObjects(nil)
q.order(byDescending: "createdAt")
return q
}
}
Here are a few images of what the problem looks like:
Edit 1:
As suggested in the comments, I even tried to debug view hierarchy but I don't know which element to delete to make the grey bar go away.

Answer 1

It looks like it might be your navigation bar. Have you tried using this:
self.navigationController?.setNavigationBarHidden(true, animated: true)
instead of the statement you have of:
self.navigationController?.isNavigationBarHidden = true
Update #2:
Actually, I just realized you have that in the viewDidLoad. Move that to viewWillAppear and I bet it will work.
Update #3:
Just to reflect the true fix here, the offending code was in the viewDidAppear:
navigationController?.isNavigationBarHidden = false