tableView reloadData doesn't work, delegate methods - ios

Question

I am trying to create new category in 1 view controller (AddCategoryViewController) and show it in table view controller (CategoryViewController). But there's an issue with reloading data.
New category item shows only after turning on and off the app, even when there is tableView.reloadData().
I tried to change the title of navigation in addButtonPressed function and the title changes immediately.
When I was using UIAlertView to add data, tableView.reloadData() worked. So I guess it's something with 2 view controllers and delegate methods?
Thanks for your help <3
show item:
import UIKit
import CoreData
class CategoryViewController: UITableViewController {
#IBOutlet weak var navigation: UINavigationItem!
var categoryArray = [Category]()
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
override func viewDidLoad() {
super.viewDidLoad()
loadCategory()
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return categoryArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: .default, reuseIdentifier: "CategoryItemCell")
cell.textLabel?.text = categoryArray[indexPath.row].name
if let randomColor = categoryArray[indexPath.row].color {
cell.textLabel?.textColor = UIColor(hex: randomColor)
}
return cell
}
// MARK: - Table view data source
#IBAction func addPressed(_ sender: UIBarButtonItem) {
let addCategoryVC = storyboard?.instantiateViewController(withIdentifier: "AddCategoryViewController") as! AddCategoryViewController
addCategoryVC.delegate = self
present(addCategoryVC, animated: true, completion: nil)
}
// MARK: - CoreData methods
func saveCategory() {
do {
try context.save()
} catch {
print("Save error: \(error)")
}
tableView.reloadData()
}
func loadCategory(with request: NSFetchRequest<Category> = Category.fetchRequest()) {
do {
categoryArray = try context.fetch(request)
} catch {
print("Load error: \(error)")
}
tableView.reloadData()
}
func addCategory(name: String, description: String) {
let newCategory = Category(context: context.self)
newCategory.name = name
newCategory.descriptionOfCategory = description
newCategory.color = UIColor.random().toHex
saveCategory()
print("name form func: \(name)")
print("description from func: \(description)")
}
}
// MARK: AddCateogry delegate methods
extension CategoryViewController: AddCategoryDelegate {
func addButtonPressed(name: String, description: String) {
addCategory(name: name, description: description)
navigation.title = "I have changed!"
}
}
Add item:
import UIKit
protocol AddCategoryDelegate {
func addButtonPressed(name: String, description: String)
}
class AddCategoryViewController: UIViewController {
var delegate : AddCategoryDelegate!
#IBOutlet weak var nameTextField: UITextField!
#IBOutlet weak var descriptionTextField: UITextField!
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.
}
#IBAction func addCategoryButtonPressed(_ sender: UIButton) {
delegate.addButtonPressed(name: nameTextField.text!, description: descriptionTextField.text!)
dismiss(animated: true, completion: nil)
}
}

Answer 1

You only save the category to coredata inside addCategory , but you have to add the item to the array also , or call loadCategory before tableView.reloadData() inside saveCategory