Table View Remains Blank Despite Core Data "Successfully Saved!" - ios

Question

My first Screen
Then I go on to login screen by clicking "Sign In" button.
My Login Screen
Next I go on to the screen with the table view... This is how it looks when I successfully login:
Table View Screen
Next I click on the add resident icon(the small icon with the person and the plus sign) and I get this page in which I can register a resident.
Register Resident Screen
Next, what should happen is, when I click the add button, it should "successfully save" my core data and it should automatically dismiss this view and got back to the "Table View Screen" (Previous Picture). But it doesn't! When it goes to the Table View Screen, it should register the new resident with the name "Bob" and the Age "45" saved in my core data successfully. Please help me fix these 2 problems...
This is the view controller in which my data is saved using core data. I get "successfully saved" when I click the "Add" button.
// ResidentViewController.swift
// 77 Safety Updater
//
// Created by Tejas Ravishankar on 17/04/20.
// Copyright © 2020 Tejas Ravishankar. All rights reserved.
//
//MARK:- Import Modules
import UIKit
import CoreData
let appDelegate = UIApplication.shared.delegate as? AppDelegate
class ResidentViewController: UIViewController {
//MARK:- Variables
var residentCount : Int = 0
var travelSwitchIsOn : Bool = false
var movedInSwitchIsOn : Bool = false
var stateColor : UIColor = .systemGreen
var name : String = ""
var age : Int = 0
var type : Int = 0
var risk : String = ""
//MARK:- IB Outlets
#IBOutlet weak var nameTextField: UITextField!
#IBOutlet weak var riskLabel: UILabel!
#IBOutlet weak var ageTextField: UITextField!
#IBOutlet weak var workingSwitch: UISwitch!
#IBOutlet weak var movedInSwitch: UISwitch!
#IBOutlet weak var movedInLabel: UILabel!
#IBOutlet weak var yesLabel: UILabel!
#IBOutlet weak var noLabel: UILabel!
//MARK:- Add Button Action
#IBAction func addButtonPressed(_ sender: UIButton)
{
residentCount += 1
let ageText = ageTextField.text
if ageText!.count >= 4
{
ageTextField.text = ""
ageTextField.placeholder = "Invalid Age!"
}
name = nameTextField.text!
age = Int(ageText!)!
travelSwitchIsOn = workingSwitch.isOn
movedInSwitchIsOn = movedInSwitch.isOn
if movedInSwitchIsOn == true || travelSwitchIsOn == true
{
risk = "Medium"
}
else if movedInSwitchIsOn == true && travelSwitchIsOn == true
{
risk = "High"
}
else
{
risk = "Low"
}
if age <= 4
{
stateColor = .systemRed
}
if age <= 20
{
stateColor = .systemGreen
}
else if age >= 55 && age <= 90
{
stateColor = .systemRed
}
else if age > 90
{
stateColor = .systemPurple
}
if nameTextField.text != "" && ageTextField.text != ""
{
saveData { (complete) in
if complete
{
self.dismiss(animated: true, completion: nil)
}
}
}
}
//MARK:- Core Data Save Function
func saveData(completion:(_ finished:Bool) -> ())
{
guard let managedContext = appDelegate?.persistentContainer.viewContext
else
{
return
}
let data = UserData(context: managedContext)
data.name = name
data.age = Int32(age)
data.risk = risk
do {
try managedContext.save()
print("Successfully Saved!")
completion(true)
}
catch {
debugPrint("Save Failed: \(error.localizedDescription)")
}
}
//MARK:- Resident Type Action
#IBAction func residentTypeChanged(_ sender: UISegmentedControl)
{
let type = sender.selectedSegmentIndex
if type == 0
{
movedInSwitch.isHidden = true
movedInLabel.isHidden = true
yesLabel.isHidden = true
noLabel.isHidden = true
}
if type == 1
{
movedInSwitch.isHidden = false
movedInLabel.isHidden = false
yesLabel.isHidden = false
noLabel.isHidden = false
}
}
//MARK:- When App Screen Loads Up
override func viewDidLoad()
{
super.viewDidLoad()
movedInSwitch.isHidden = true
movedInLabel.isHidden = true
riskLabel.text = ""
ageTextField.delegate = self
yesLabel.isHidden = true
noLabel.isHidden = true
}
}
extension ResidentViewController : UITextFieldDelegate
{
#IBAction func ageTextField(_ sender: UITextField)
{
let age = Int(ageTextField.text!)
if age! <= 4
{
riskLabel.textColor = UIColor.systemGreen
stateColor = .systemRed
riskLabel.text = "High Risk Host!"
}
if age! <= 20
{
riskLabel.textColor = UIColor.systemGreen
stateColor = .systemGreen
riskLabel.text = "Low Risk Host!"
}
else if age! >= 55 && age! <= 90
{
riskLabel.textColor = UIColor.systemRed
stateColor = .systemRed
riskLabel.text = "High Risk Host!"
}
else if age! > 90
{
riskLabel.textColor = UIColor.systemPurple
stateColor = .systemPurple
riskLabel.text = "Very High Risk Host!"
}
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
ageTextField.endEditing(true)
return true
}
func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
if ageTextField.text != ""
{
return true
}
else
{
textField.placeholder = "Type Something!"
return false
}
}
}
This is the table view controller which contains the configuration of the cell and the table! I have also fetched the data in this view controller. In the output: I get "successfully fetched!" Ignore the login view controller.swift as it just contains my authentication using user defaults... There are no parts of CoreData in that file...
//
// StatisticsViewController.swift
// 77 Safety Updater
//
// Created by Tejas Ravishankar on 17/04/20.
// Copyright © 2020 Tejas Ravishankar. All rights reserved.
//
//MARK:- Import Modules
import UIKit
import CoreData
class StatisticsViewController: UIViewController
{
var details : [UserData] = []
#IBOutlet weak var informationTableView: UITableView!
override func viewDidLoad()
{
super.viewDidLoad()
informationTableView.delegate = self
informationTableView.dataSource = self
informationTableView.isHidden = false
informationTableView.register(UINib(nibName: "InformationTableViewCell", bundle: nil), forCellReuseIdentifier: "informationCell")
}
func fetchData(completion:(_ complete:Bool) -> ())
{
guard let managedContext = appDelegate?.persistentContainer.viewContext
else
{
return
}
let fetchRequest = NSFetchRequest<UserData>(entityName: "UserData")
do {
try managedContext.fetch(fetchRequest) as![UserData]
print("Successfully Fetched!")
completion(true)
}
catch
{
debugPrint("Failed To Fetch: \(error.localizedDescription)")
completion(false)
}
}
override func viewWillAppear(_ animated: Bool)
{
super.viewWillAppear(animated)
self.fetchData { (complete) in
if complete
{
if details.count >= 1
{
informationTableView.isHidden = true
}
else
{
informationTableView.isHidden = false
}
}
}
}
}
extension StatisticsViewController : UITableViewDelegate,UITableViewDataSource
{
func numberOfSections(in tableView: UITableView) -> Int
{
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
details.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = informationTableView.dequeueReusableCell(withIdentifier: "informationCell") as! InformationTableViewCell
let userDetail = details[indexPath.row]
cell.configureCell(userDetail)
return cell
}
}
This is my table view cell cocoa touch class in which I configure the data stored in the cells.
//
// InformationTableViewCell.swift
// 77 Safety Updater
//
// Created by Tejas Ravishankar on 26/04/20.
// Copyright © 2020 Tejas Ravishankar. All rights reserved.
//
import UIKit
import CoreData
class InformationTableViewCell: UITableViewCell
{
#IBOutlet weak var ageLabel: UILabel!
#IBOutlet weak var nameLabel: UILabel!
override func awakeFromNib()
{
super.awakeFromNib()
}
override func setSelected(_ selected: Bool, animated: Bool)
{
super.setSelected(selected, animated: animated)
}
func configureCell(_ detail : UserData)
{
self.nameLabel.text = detail.name
self.ageLabel.text = String(describing: detail.age)
}
}
Thanks A Lot!!!