The problem is not UserDefaults but errors in your code (formatted with tool):
struct Person: Codable {
var firstName: String
var lastName: String
}
class viewController: UIViewController {
var newPerson = [Person]()
override func viewDidLoad() {
let person = [Person(firstName: "Peterson", lastName: "Jota") , Person(firstName: "John", lastName: "Paul")]
let encoder = JSONEncoder()
if let encoded = try? encoder.encode(person) {
UserDefaults.standard.set(encoded, forKey: "savedPerson")
}
}
}
var person = [Person]()
func tableView( tableView: UITableView, numberOfRowsInSection section: Int) - Int {
return person.count
}
func tableView( tableView: UITableView, cellForRowAt indexPath: IndexPath) - UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellID", for: indexPath) as! UITableViewCell
cell.textLabel?.text = person[indexPath.row]
return cell
}
Line 8, you declare newPerson but never use it. What is it for ?
Line 12, you create person. But it does not exist outside of viewDidLoad.
So line 25, person is empty. Hence return 0. And so, nothing is displayed in TableView.
Some other comments for better readabilty Names of class should start with Uppercase : class ViewController
person is an array, better name it persons.
Declaration better be at beginning of class.
So, more correct code:
struct Person: Codable {
var firstName: String
var lastName: String
}
class ViewController: UIViewController {
var newPerson = [Person]() // == Where do you use it ?
var persons = [Person]() // renamed
override func viewDidLoad() {
// NOT Redeclare HERE let person = [Person(firstName: "Peterson", lastName: "Jota") , Person(firstName: "John", lastName: "Paul")]
person = [Person(firstName: "Peterson", lastName: "Jota") , Person(firstName: "John", lastName: "Paul")] // Now, array is populated
let encoder = JSONEncoder()
if let encoded = try? encoder.encode(persons) {
UserDefaults.standard.set(encoded, forKey: "savedPerson")
}
}
}
func tableView( tableView: UITableView, numberOfRowsInSection section: Int) - Int {
return persons.count
}
func tableView( tableView: UITableView, cellForRowAt indexPath: IndexPath) - UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellID", for: indexPath) as! UITableViewCell
cell.textLabel?.text = persons[indexPath.row]
return cell
}
If that works, don't forget to close the thread. Otherwise tell exactly what the remaining problem is and post more code if needed.
