CoreData not Persisting? - swift

Question

I am saving an exercise into core data and calling it into the table, this works in terms of carrying the info from the user input into the table, however the coredata doesnt persist so when i re open the app, the entry is lost.
It was actually working yesterday and seems to have broken, but I havent made a change that would effect this as far as im aware. The one thing i found when debugging is that when I loaded the app its meant to point at the sql database in my console, however its changed to a .configurationprofiles file? Could this be a cause and what would the fix be? I will include the code for the tableview and the code for the user entry form below to show the information flow. Let me know if any other data is needed to be added.
import Foundation
import UIKit
import CoreData
class ExerciseEditorController: UIViewController, UITextFieldDelegate {
var managedObjectContext: NSManagedObjectContext?
var userRepsCount = Int()
var userSetsCount = Int()
#IBOutlet weak var userExerciseName: UITextField!
#IBOutlet weak var userExerciseSetCounter: UILabel!
#IBOutlet weak var userExerciseRepsCounter: UILabel!
#IBOutlet weak var userExerciseWeight: UITextField!
#IBAction func userSetsStepper(_ sender: UIStepper) {
userExerciseSetCounter.text = Int(sender.value).description
self.userSetsCount = Int(sender.value)
}
#IBAction func userRepsStepper(_ sender: UIStepper) {
userExerciseRepsCounter.text = Int(sender.value).description
self.userRepsCount = Int(sender.value)
}
#IBAction func cancelExerciseEditor(_ sender: Any) {
self.performSegue(withIdentifier: "unwindToWorkoutDesignerWithSegue:", sender: self)
}
#IBAction func saveExerciseToWorkout(_ sender: Any) {
createExercise()
self.performSegue(withIdentifier: "unwindToWorkoutDesignerWithSegue:", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = (UIColor.customBackgroundGraphite())
userExerciseSetCounter.text = String(userSetsCount)
userExerciseRepsCounter.text = String(userSetsCount)
userExerciseWeight.delegate = self
userExerciseWeight.keyboardType = .numbersAndPunctuation
}
func createExercise() {
let userExerciseWeightSet = Double(self.userExerciseWeight.text!) //make this safe!
guard let managedObjectContext = managedObjectContext else { return }
let userExercise = UserExercise(context: managedObjectContext)
userExercise.name = userExerciseName.text
userExercise.sets = Int64(userSetsCount)
userExercise.reps = Int64(userRepsCount)
userExercise.weight = userExerciseWeightSet! //make this safe!
userExercise.createdAt = Date().timeIntervalSince1970
}
func animateTextField(textField: UITextField, up: Bool) {
let movementDistance:CGFloat = -130
let movementDuration: Double = 0.3
var movement:CGFloat = 0
if up {
movement = movementDistance
}
else {
movement = -movementDistance
}
UIView.beginAnimations("animateTextField", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration)
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
func textFieldDidBeginEditing(_ textField: UITextField) {
self.animateTextField(textField: textField, up:true)
}
func textFieldDidEndEditing(_ textField: UITextField) {
self.animateTextField(textField: textField, up:false)
}
}
And this is the tableview:
import Foundation
import UIKit
import CoreData
class WorkoutDesignerController: UIViewController, UITableViewDataSource, UITableViewDelegate, NSFetchedResultsControllerDelegate {
#IBAction func unwindToWorkoutDesigner(segue: UIStoryboardSegue) {}
#IBOutlet weak var workoutDesignerTable: UITableView!
#IBOutlet weak var tapToAddExercise: UILabel!
#IBOutlet weak var activityIndicatorView: UIActivityIndicatorView!
#IBAction func cancelWorkoutDesigner(_ sender: Any) {
self.performSegue(withIdentifier: "unwindToTemplatesWithSegue", sender: self)
}
private let persistentContainer = NSPersistentContainer(name: "Lift")
override func viewDidLoad() {
super.viewDidLoad()
setupView()
workoutDesignerTable.delegate = self
workoutDesignerTable.dataSource = self
view.backgroundColor = (UIColor.customBackgroundGraphite())
persistentContainer.loadPersistentStores { (persistentStoreDescription, error) in
if let error = error {
print("Unable to Load Persistent Store")
print("\(error), \(error.localizedDescription)")
} else {
self.setupView()
do {
try self.fetchedResultsController.performFetch()
} catch {
let fetchError = error as NSError
print("Unable to Perform Fetch Request")
print("\(fetchError), \(fetchError.localizedDescription)")
}
self.updateView()
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
guard let userExercises = fetchedResultsController.fetchedObjects else { return 0 }
return userExercises.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
guard let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as? RoutineTableViewCell else {
fatalError("Unexpected Index Path")
}
cell.backgroundColor = UIColor.customBackgroundGraphite()
cell.textLabel?.textColor = UIColor.white
let userExercise = fetchedResultsController.object(at: indexPath)
cell.nameLabel.text = userExercise.name
cell.repsLabel.text = String(userExercise.reps)
cell.setsLabel.text = String(userExercise.sets)
cell.weightLabel.text = String(userExercise.weight)
return cell
}
private func setupView() {
setupMessageLabel()
updateView()
}
private func setupMessageLabel() {
tapToAddExercise.text = "Tap + To Add An Exercise To The Routine"
}
fileprivate func updateView() {
var hasUserExercises = false
if let UserExercise = fetchedResultsController.fetchedObjects {
hasUserExercises = UserExercise.count > 0
}
workoutDesignerTable.isHidden = !hasUserExercises
tapToAddExercise.isHidden = hasUserExercises
activityIndicatorView.stopAnimating()
}
fileprivate lazy var fetchedResultsController: NSFetchedResultsController<UserExercise> = {
// Create Fetch Request
let fetchRequest: NSFetchRequest<UserExercise> = UserExercise.fetchRequest()
// Configure Fetch Request
fetchRequest.sortDescriptors = [NSSortDescriptor(key: "createdAt", ascending: true)]
// Create Fetched Results Controller
let fetchedResultsController = NSFetchedResultsController(fetchRequest: fetchRequest, managedObjectContext: self.persistentContainer.viewContext, sectionNameKeyPath: nil, cacheName: nil)
// Configure Fetched Results Controller
fetchedResultsController.delegate = self
return fetchedResultsController
}()
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "addNewExerciseSegue" {
if let destinationViewController = segue.destination as? ExerciseEditorController {
// Configure View Controller
destinationViewController.managedObjectContext = persistentContainer.viewContext
}
}
}
func controllerWillChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
workoutDesignerTable.beginUpdates()
}
func controllerDidChangeContent(_ controller: NSFetchedResultsController<NSFetchRequestResult>) {
workoutDesignerTable.endUpdates()
updateView()
}
func controller(_ controller: NSFetchedResultsController<NSFetchRequestResult>, didChange anObject: Any, at indexPath: IndexPath?, for type: NSFetchedResultsChangeType, newIndexPath: IndexPath?) {
switch (type) {
case .insert:
if let indexPath = newIndexPath {
workoutDesignerTable.insertRows(at: [indexPath], with: .fade)
}
break;
default:
print("...")
}
}
}

Answer 1

You need to call context.save().