Custom Table View outlets throwing nil - swift

Question

I am trying to implement a simple iOS app using the VIPER pattern following this tutorial. The app is a simple table view which displays data from a json req
I have created the table view and can successfully show data from my object using the default cell.textLabel. I am however trying to create a custom table view cell and so created the nib and class. I have connected all the outlets up correctly to the class from the nib and the code for this class is as follows:
class CustomTableViewCell: UITableViewCell {
static let identifier = "CustomTableView"
static func nib() -> UINib {
return UINib(nibName: "CustomTableViewCell", bundle: nil)
}
#IBOutlet var level: UILabel!
#IBOutlet var levelNumber: UILabel!
#IBOutlet var progress: UIProgressView!
#IBOutlet var leftProgress: UILabel!
#IBOutlet var rightProgress: UILabel!
public func configure(levelString: String, levelNum: String, prog: Float, left: String, right: String) {
level.text = levelString
levelNumber.text = levelNum
progress.setProgress(prog, animated: true)
leftProgress.text = left
rightProgress.text = right
}
override func awakeFromNib() {
super.awakeFromNib()
}
}
The problem is, when I run the app, these outlets are erroring: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value on level.text inside the configure function. I can suppress this error by doing this in my view:
table.register(CustomTableViewCell.nib(), forCellReuseIdentifier: CustomTableViewCell.identifier) however this just shows an empty tableView without the custom rows or any data. If I do table.register(CustomTableViewCell.self, forCellReuseIdentifier: CustomTableViewCell.identifier) then this crashes. What way should I be doing it and how can I get the data to display in the tableView? relevant code added below:
let tableView: UITableView = {
let table = UITableView()
table.register(CustomTableViewCell.nib(), forCellReuseIdentifier: CustomTableViewCell.identifier)
table.isHidden = true
return table
}()
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(tableView)
tableView.delegate = self
tableView.dataSource = self
}
override func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
tableView.frame = view.bounds
label.frame = CGRect(x: 0, y: 0, width: 200, height: 50)
label.center = view.center
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return achievements.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: CustomTableViewCell.identifier, for: indexPath) as! CustomTableViewCell
cell.configure(levelString: "Level",
levelNum: achievements[indexPath.row].level,
prog: Float(achievements[indexPath.row].progress/achievements[indexPath.row].total),
left: String(achievements[indexPath.row].progress),
right: String(achievements[indexPath.row].total))
return cell
}
Outlet Setup:
Files Owner:

Answer 1

I appreciate this might not be the correct answer for everyone, but this is what worked for me. I was struggling with trying to debug this and for the sake of time, I concluded that just creating everything programmatically would be easier. There are numerous tutorials for this, but I took the following structure:
Stevia library used to set constraints for components and add subview
import Stevia
import UIKit
class CustomTableViewCell: UITableViewCell {
static let identifier = "CustomTableViewCell"
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupFieldsAndConstraints()
}
func setupFieldsAndConstraints() {
subviews {
customLabel
}
setupCustomLabel()
}
var customLabel: UILabel = {
let level = UILabel()
return level
}()
func setupCustomLabel() {
customLabel.style { l in
l.textAlignment = .left
l.textColor = .white
l.Top == 50
l.Left == 20
}
}
func setValues(object: Object) {
label.text = object.name
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
And this is referenced in your view as it normally would be. I chose to add mine to a function that encapsulates any table configuration and then called in viewDidLoad:
tableView.register(CustomTableViewCell.self, forCellReuseIdentifier: CustomTableViewCell.identifier)
And then for the cellForRowAt:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: CustomTableViewCell.identifier) as! CustomTableViewCell
cell.setValues(object: Object[indexPath.row])
return cell
}