Swift 3 - Get value from core data - swift

Question

I have a class that will take 2 inputs, Sets and Reps
Using prepare(for segue: UIStoryboardSegue, sender: Any?) I passed the values back to the WorkoutViewController.Swift
The data is successfully saved since after pressing save barbutton in the SetRepsViewController.Swift the window pops
However the labels do not show the values
What am I doing wrong here
I believe that targetLog?.setAndrep?.sets is not correctly getting the value
Can someone please help me on what I should do?
Screenshow of the viewController
WorkoutViewController.swift
import UIKit
import CoreData
class WorkoutViewController: UIViewController{
var muscleLog: MuscleList?
var targetLog: Log?
#IBOutlet weak var LogTableView: UITableView!
#IBOutlet weak var input: UITextField!
#IBOutlet weak var weightInput: UITextField!
#IBOutlet weak var repsInput: UITextField!
#IBOutlet weak var dateView: UILabel!
#IBOutlet weak var setsLabel: UILabel!
#IBOutlet weak var repsLabel: UILabel!
let dateFormatter = DateFormatter()
func workoutTitle(title: String){
self.title = title
}
override func viewDidLoad() {
super.viewDidLoad()
dateFormatter.calendar = Calendar(identifier: .persian)
dateFormatter.dateFormat = "dd/MM/yyyy"
let date = Date()
let dateInPersian = dateFormatter.string(from: date)
dateView.text = dateInPersian
}
override func viewWillAppear(_ animated: Bool) {
setsLabel.text = targetLog?.repLog?.sets
repsLabel.text = targetLog?.setAndrep?.reps
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "addTarget"{
guard let destination = segue.destination as? SetRepsViewController else {
return
}
destination.destLog = targetLog
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//hide keybaord method
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
#IBAction func addLog(_ sender: Any) {
let weight = Double(weightInput.text ?? "") ?? 0.0
let reps = Int16(repsInput.text ?? "") ?? 0
let todayDate = dateView.text ?? ""
let notes = input.text ?? ""
if let log = Log(weight: weight, reps: reps, currentday: todayDate, notes: notes){
muscleLog?.addToDailyLogs(log)
do{
try log.managedObjectContext?.save()
}catch {
print("Could not Log")
}
}
LogTableView.reloadData()
}
func deleteMuscle(at indexPath: IndexPath){
guard let logs = muscleLog?.logList?[indexPath.row],
let managedContext = logs.managedObjectContext else{
return
}
managedContext.delete(logs)
do{
try managedContext.save()
LogTableView.deleteRows(at: [indexPath], with: .automatic)
}catch{
print("Could not save")
LogTableView.reloadRows(at: [indexPath], with: .automatic)
}
}
}
extension WorkoutViewController: UITableViewDelegate,UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return muscleLog?.logList?.count ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let WorkCell = LogTableView.dequeueReusableCell(withIdentifier: "WorkCell", for: indexPath)
if let logs = muscleLog?.logList?[indexPath.row] {
WorkCell.textLabel?.text = logs.currentday
let weight = String(logs.weight)
let reps = String(logs.reps)
let note = logs.notes
WorkCell.detailTextLabel?.text = weight + " kg x " + reps + " reps Notes: "+note!
}
return WorkCell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete{
deleteMuscle(at: indexPath)
}
}
}
SetRepsViewController.swift
import UIKit
class SetRepsViewController: UIViewController {
var destLog: Log?
#IBOutlet weak var setText: UITextField!
#IBOutlet weak var repText: UITextField!
#IBAction func saveTarget(_ sender: UIBarButtonItem) {
let sets = setText.text ?? ""
let reps = repText.text ?? ""
if let target = SetRep(sets: sets, reps: reps){
destLog?.addsetAndrep(target)
do{
try target.managedObjectContext?.save()
self.navigationController?.popViewController(animated: true)
}catch{
print("Could not save workout")
}
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}

Answer 1

#IMan after saving the data in core data you will have to fetch the data from CoreData then you can show your data.

Answer 2

You need to set the value for destLog in your prepareForSegue by determining which row has been selected in your tableView:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "addTarget"{
guard let destination = segue.destination as? SetRepsViewController else {
return
}
let indexPath = LogTableView.indexPathForSelectedRow
targetLog = muscleLog?.logList?[indexPath.row]
destination.destLog = targetLog
}
}
That will ensure that the Log corresponding to the selected row in your table view is passed to the SetRepsViewController. When you dismiss the SetRepsViewController, the viewWillAppear code will update the labels correctly as targetLog and destLog both refer to the same Log object.

Answer 3

#IMan Try this
func fetchList() {
let moc = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
let fetchRequest: NSFetchRequest<"YOUR ENTITY NAME"> = ("YOUR ENTITY NAME").fetchRequest()
do {
let fetchResults = try self.moc.fetch(fetchRequest)
for Entity in fetchResults as [NSManagedObject] {
let entity1 = Entity.value(forKey: "YOUR ENTITY KEY VALUE")
let entity12 = Entity.value(forKey: "YOUR ENTITY KEY VALUE")
print(entity1, entity2)
} catch {
print(error.localizedDescription)
}
}