Modifying Realm data crashes on tableView.reloadData() - ios

Question

You get one thing figured out and something else comes along and that's why I love this stuff.
My workout app uses realm for data persistence and when I modify some of the data elements of the file, it crashes when I reload the tableView. Here is a layout of the tableview in WorkoutViewController.
I select an item to edit it's three properties (Name, Date and average time). When selecting Edit the following view controller is presented. This is WorkoutAlertViewController.
Here is the relevant code:
class WorkoutViewController: UIViewController {
let realm = try! Realm()
var workoutItems: Results<Workout>?
var passedWorkout = Workout()
#IBOutlet weak var tableView: UITableView!
func editWorkout(workout: Workout, name: String, time: String, date: Date) {
do {
try self.realm.write {
passedWorkout = workout
print("passedWorkout \(workout)")
print("changes to be made \(name), \(time), \(date)")
passedWorkout.name = name
passedWorkout.time = time
passedWorkout.dateCreated = date
print("workout changed \(passedWorkout)")
}
} catch {
print("Error editing workout \(error)")
}
// loadWorkout()
}
func loadWorkout() {
workoutItems = realm.objects(Workout.self).sorted(byKeyPath: "name", ascending: false)
print("workoutItems \(String(describing: workoutItems))")
tableView.reloadData()
}
}
extension WorkoutViewController: PassNewWorkout {
func didTapAdd(name: String, time: String, date: Date) {
workoutName = name
averageTime = time
creationDate = date
let newWorkout = Workout()
newWorkout.name = workoutName
newWorkout.dateCreated = creationDate
newWorkout.time = averageTime
saveWorkout(workout: newWorkout)
}
}
extension WorkoutViewController: UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return workoutItems?.count ?? 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! WorkoutCell
if let workout = workoutItems?[indexPath.row] {
cell.workoutLabel.text = workout.name
cell.dateLabel.text = String("Created: \(functions.convertTime(timeToConvert: workout.dateCreated!))")
cell.timeLabel.text = String("Avg Time: \(workout.time)")
} else {
cell.textLabel?.text = "No Workouts Added"
}
return cell
}
}
extension WorkoutViewController: UITableViewDelegate {
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "workoutListSegue", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "workoutListSegue" {
if let destinationVC = segue.destination as? WorkoutListViewController, let indexPath = tableView.indexPathForSelectedRow {
if let workout = workoutItems?[indexPath.row] {
destinationVC.selectedWorkout = workout
destinationVC.workoutName = workout.name
}
}
}
}
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
let deleteAction = UIContextualAction(style: .destructive, title: "Delete") { (action, view, actionPerformed) in
if let _ = tableView.cellForRow(at: indexPath){
self.passedWorkout = self.workoutItems![indexPath.row]
self.deleteWorkout(workout: self.passedWorkout)
}
tableView.reloadData()
}
deleteAction.backgroundColor = .red
let editAction = UIContextualAction(style: .normal, title: "Edit") { (action, view, actionPerformed) in
if let _ = tableView.cellForRow(at: indexPath){
let alertVC = self.storyboard!.instantiateViewController(identifier: "WorkoutVC") as! WorkoutAlertViewController
self.passedWorkout = self.workoutItems![indexPath.row]
print("editAction \(self.passedWorkout)")
alertVC.didTapEdit(workout: self.passedWorkout)
self.present(alertVC, animated: true, completion: nil)
}
}
editAction.backgroundColor = .gray
return UISwipeActionsConfiguration(actions: [deleteAction, editAction])
}
}
The app crashes on loadWorkout() with:
Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value: file /Users/kevin/Desktop/FitTrax/FitTrax/Controller/Fitness/WorkoutViewController.swift, line 88
Line 88 is tableView.reloadData()
Here is the WorkoutAlertViewController file.
protocol PassNewWorkout {
func didTapAdd(name: String, time: String, date: Date)
}
class WorkoutAlertViewController: UIViewController {
var workoutName = String()
var averageTime = String()
var creationDate = Date()
var receivedWorkout = Workout()
#IBAction func addButtonPressed(_ sender: UIButton) {
dismiss(animated: true, completion: nil)
if workoutName == "" {
workoutName = workoutTextField.text!
creationDate = datePicker.date
averageTime = timeTextField.text!
alertDelegate.didTapAdd(name: workoutName, time: averageTime, date: creationDate)
} else {
workoutName = workoutTextField.text!
creationDate = datePicker.date
averageTime = timeTextField.text!
let workoutVC = storyboard!.instantiateViewController(withIdentifier: "Main") as! WorkoutViewController
workoutVC.editWorkout(workout: receivedWorkout, name: workoutName, time: averageTime, date: creationDate)
}
}
func didTapEdit(workout: Workout) {
workoutName = workout.name
averageTime = workout.time
creationDate = workout.dateCreated!
receivedWorkout = workout
}
}
The edit does work without the reload but does not immediately show the changes. If I go back to the Fitness Menu and back to the Workout Menu, it displays the changes then. It's something with that reload that I can't figure out.
Thank you for any suggestions.