UITableView not updating data - ios

Question

I have trying for sometime to make the "reloadData()" work but it is not working. I've even tried "DispatchQueue.main.async{self.tableView.reloadData()}"
Below is the code
import UIKit
import QuartzCore
import GameKit
enum Tags: Int {
case levelLabel = 100
case background = 101
case highScoreLabel = 102
case star1 = 201
case star2 = 202
case star3 = 203
}
let LightBlue = UIColor.systemBlue
let Green = UIColor.systemRed
let Purple = UIColor.systemPurple
let Pink = UIColor.systemPink
let Orange = UIColor.systemOrange
let OneStarScore = 5
let TwoStarScore = 10
let ThreeStarScore = 15
let NumLevels = 11
class HomeViewController: UIViewController, UITableViewDataSource,
UITableViewDelegate, GKGameCenterControllerDelegate {
#IBOutlet weak var tableView: UITableView!
var highScores: [Int] = [Int]()
var unlockedLevels = 0
let colors = [LightBlue, Green, Purple, Pink, Orange]
var tutorialPageVC: PageDataSourceViewController?
var gameVC: GameViewController?
override func viewDidLoad() {
super.viewDidLoad()
if #available(iOS 13.0, *) {
tableView.separatorColor = UIColor.systemBackground
} else {
// Fallback on earlier versions
}
let storyboard = self.storyboard
tutorialPageVC = storyboard?.instantiateViewController(withIdentifier: "PageDataSourceVC")
as? PageDataSourceViewController
gameVC = storyboard?.instantiateViewController(withIdentifier: "GameViewController")
as? GameViewController
// Trying to fix UITableView
/// Put code here
self.tableView.reloadData()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(false)
let defaults = UserDefaults.standard
if let scoresArray = defaults.array(forKey: "highScores") {
highScores = scoresArray as! [Int]
unlockedLevels = highScores.count - 1 // Subtract one for tutorial
if highScores[unlockedLevels] >= 5 {
unlockedLevels += 1 // Unlock additional level if last high score is greater than 5
}
}
}
// MARK: - TableView data source methods
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return NumLevels
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "LevelCell", for: indexPath)
cell.selectionStyle = UITableViewCell.SelectionStyle.none
let view = cell.viewWithTag(Tags.background.rawValue) as UIView?
let levelLabel = cell.viewWithTag(Tags.levelLabel.rawValue) as! UILabel
let scoreLabel = cell.viewWithTag(Tags.highScoreLabel.rawValue) as! UILabel
let star1 = cell.viewWithTag(Tags.star1.rawValue) as! UIImageView
let star2 = cell.viewWithTag(Tags.star2.rawValue) as! UIImageView
let star3 = cell.viewWithTag(Tags.star3.rawValue) as! UIImageView
view?.layer.borderColor = colors[indexPath.row % 5].cgColor
view?.layer.borderWidth = 6.0
if indexPath.row == 0 {
// Tutorial Level
view?.alpha = 1.0
levelLabel.text = "Tutorial"
star1.isHidden = true
star2.isHidden = true
star3.isHidden = true
scoreLabel.text = ""
} else if indexPath.row + 1 <= highScores.count {
// Levels that have been played
view?.alpha = 1.0
levelLabel.text = "Level \(indexPath.row)"
star1.isHidden = false
star2.isHidden = false
star3.isHidden = false
formatStars(highScores[indexPath.row], stars: [star1, star2, star3])
scoreLabel.text = "High Score: \(highScores[indexPath.row])"
} else {
// Levels that have NOT been played
view?.alpha = indexPath.row > unlockedLevels ? 0.5 : 1.0
levelLabel.text = "Level \(indexPath.row)"
star1.isHidden = true
star2.isHidden = true
star3.isHidden = true
scoreLabel.text = ""
}
return cell
}
/// Display stars for each level on homepage
func formatStars(_ score: Int, stars: [UIImageView]) {
switch score {
case 0..<OneStarScore:
stars[0].image = UIImage(named: "star-empty")
stars[1].image = UIImage(named: "star-empty")
stars[2].image = UIImage(named: "star-empty")
case OneStarScore..<TwoStarScore:
stars[0].image = UIImage(named: "star")
stars[1].image = UIImage(named: "star-empty")
stars[2].image = UIImage(named: "star-empty")
case TwoStarScore..<ThreeStarScore:
stars[0].image = UIImage(named: "star")
stars[1].image = UIImage(named: "star")
stars[2].image = UIImage(named: "star-empty")
default:
stars[0].image = UIImage(named: "star")
stars[1].image = UIImage(named: "star")
stars[2].image = UIImage(named: "star")
}
}
// MARK: - TableView delegate methods
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if indexPath.row == 0 {
self.present(tutorialPageVC!, animated: true, completion: nil)
} else if indexPath.row <= unlockedLevels {
gameVC!.level = indexPath.row
self.present(gameVC!, animated: true, completion: nil)
// performSegueWithIdentifier("LevelSegue", sender: self)
}
}

Answer 1

Maybe the connection between the UITableView and the delegate and data source are not set.
You could do this in the storyboard by ctrl+dragging from the table view to the view controller and setting the delegate and data source outlets.
Or you can do so in code, e.g. in viewDidLoad:
self.tableView.dataSource = self
self.tableView.delegate = self

Answer 2

You need to set dataSource and delegate to self
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.datasource = self
}
And Assign values directly like this
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "LevelCell", for: indexPath) as? LevelCell
cell?.star1.isHidden = true
}