My code uses a textfield to enter data into core data. Then have the core data displayed on a tableview. The problem is nothing is being displayed on the tableview. Don’t know why?
import UIKit; import CoreData
class ViewController: UIViewController, UITextFieldDelegate, UITableViewDelegate, UITableViewDataSource {
@IBOutlet var fewFeetBack: UITableView!
var itemName: [NSManagedObject] = []
var titleTextField: UITextField!
@IBAction func addBUTTON(_ sender: Any) {
print("d")
let alert = UIAlertController(title: "add", message: "now", preferredStyle: .alert)
let addAction = UIAlertAction(title: "ADD", style: .default, handler: self.dd)
let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
alert.addAction(addAction)
alert.addAction(cancelAction )
alert.addTextField(configurationHandler: titleTextField)
self.present(alert, animated: true, completion: nil)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let appDelage = UIApplication.shared.delegate as! AppDelegate
let context = appDelage.persistentContainer.viewContext
let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "Title")
do {
itemName = try context.fetch(fetchRequest)
}
catch{
print("judo")
}
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == UITableViewCellEditingStyle.delete{
let appDDElageate = UIApplication.shared.delegate as! AppDelegate
let context = appDDElageate.persistentContainer.viewContext
context.delete(itemName[indexPath.row])
itemName.remove(at: indexPath.row)
}
}
func titleTextField(textfield: UITextField!){
titleTextField = textfield
titleTextField.placeholder = "ItemName"
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return itemName.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let title = itemName[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = title.value(forKey: "Title") as? String
return cell
}
func dd(alert: UIAlertAction!)
{
let appDeleage = UIApplication.shared.delegate as! AppDelegate
let context = appDeleage.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Title", in: context)
let theTitle = NSManagedObject(entity: entity!, insertInto: context)
theTitle.setValue(titleTextField.text, forKey: "Title")
do {
try context.save()
itemName.append(theTitle)
}
catch {
print("judo")
}
}
}
