NSUser Defaults - Saving 3 variables together and then fetching - ios

Question

I'm using NSUserDefaults for persistent storage in my app. It is a game where after the game ends the score, together with the date and name (entered by user) must be stored and then shown in an table view. My code so far is:
import UIKit
class LeaderboardVC: UIViewController, UITableViewDataSource, UITableViewDelegate {
var finishedGame = 0
var gameScore:Int! = 0
var name:String!
var date:String!
var score:Int!
var scoreData = [NSArray]()
var defaults = UserDefaults.standard
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
if finishedGame == 1{
saveNew()
}
self.tableView.delegate = self
self.tableView.dataSource = self
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.isNavigationBarHidden = false
self.navigationItem.hidesBackButton = true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func saveNew() {
let enterNameAlert = UIAlertController(title: "Please Enter Your Name", message: "This will be used to place you in the leaderboards", preferredStyle: .alert)
enterNameAlert.addTextField { (textField:UITextField) -> Void in
textField.placeholder = "Name"
textField.autocapitalizationType = UITextAutocapitalizationType.words
textField.autocorrectionType = UITextAutocorrectionType.no
textField.clearsOnBeginEditing = true
textField.clearsOnInsertion = true
textField.clearButtonMode = UITextFieldViewMode.always
textField.keyboardType = UIKeyboardType.default
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let confirmAction = UIAlertAction(title: "Confirm", style: .default) { (action:UIAlertAction) in
let currentTime = Date()
let timeFormatter = DateFormatter()
timeFormatter.locale = Locale.current
timeFormatter.dateFormat = "HH:mm dd/MM/yy"
let convertedTime = timeFormatter.string(from: currentTime) //date
let enteredName = enterNameAlert.textFields?.first?.text //name
// set object of date,name and score here
}
enterNameAlert.addAction(cancelAction)
enterNameAlert.addAction(confirmAction)
self.present(enterNameAlert, animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! LeaderBoardCell
cell.dateLabel?.text =
cell.dateLabel.adjustsFontSizeToFitWidth = true
cell.scoreLabel?.text =
cell.scoreLabel.adjustsFontSizeToFitWidth = true
cell.nameLabel?.text =
cell.nameLabel.adjustsFontSizeToFitWidth = true
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return scoreData.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
}
There are 3 labels in the cell one for each of the 3 values which must be displayed. How do I set these values using NSUserDefaults (They must be together FOR example score:500 goes with name:John and so on)?
EDIT - NEW CODE
import UIKit
class LeaderboardVC: UIViewController, UITableViewDataSource, UITableViewDelegate {
var finishedGame = 0
var gameScore:Int! = 0
var defaults = UserDefaults.standard
var newUserArray = NSMutableArray()
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
if finishedGame == 1{
saveNew()
}
self.tableView.delegate = self
self.tableView.dataSource = self
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.isNavigationBarHidden = false
self.navigationItem.hidesBackButton = true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func saveNew() {
let enterNameAlert = UIAlertController(title: "Please Enter Your Name", message: "This will be used to place you in the leaderboards", preferredStyle: .alert)
enterNameAlert.addTextField { (textField:UITextField) -> Void in
textField.placeholder = "Name"
textField.autocapitalizationType = UITextAutocapitalizationType.words
textField.autocorrectionType = UITextAutocorrectionType.no
textField.clearsOnBeginEditing = true
textField.clearsOnInsertion = true
textField.clearButtonMode = UITextFieldViewMode.always
textField.keyboardType = UIKeyboardType.default
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
let confirmAction = UIAlertAction(title: "Confirm", style: .default) { (action:UIAlertAction) in
let currentTime = Date()
let timeFormatter = DateFormatter()
timeFormatter.locale = Locale.current
timeFormatter.dateFormat = "HH:mm dd/MM/yy"
let convertedTime = timeFormatter.string(from: currentTime)
let enteredName = enterNameAlert.textFields?.first?.text
let newUserData = self.defaults.object(forKey: "UserData") as! NSArray
let newUserArray = NSMutableArray(array: newUserData)
let newUserRecord = [
"Name" : enteredName!,
"Score" : String(self.gameScore),
"Date" : convertedTime
] as [String : String]
newUserArray.add(newUserRecord)
self.defaults.set(newUserArray, forKey: "UserData")
self.defaults.synchronize()
print(newUserArray)
print("hello")
print(self.defaults)
}
enterNameAlert.addAction(cancelAction)
enterNameAlert.addAction(confirmAction)
self.present(enterNameAlert, animated: true, completion: nil)
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! LeaderBoardCell
let userData = defaults.object(forKey: "UserData") as! NSArray
cell.dateLabel?.text = "Date: \(((userData.object(at: indexPath.row) as! [String:Any])["Date"] as! String))"
cell.dateLabel.adjustsFontSizeToFitWidth = true
cell.scoreLabel?.text = "Score: \(((userData.object(at: indexPath.row) as! [String:Any])["Score"] as! String))"
cell.scoreLabel.adjustsFontSizeToFitWidth = true
cell.nameLabel?.text = "Name: \(((userData.object(at: indexPath.row) as! [String:Any])["Name"] as! String))"
cell.nameLabel.adjustsFontSizeToFitWidth = true
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return newUserArray.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
}

Answer 1

You can set dictionary to UserDefaults (that's for 3 values at one time). To do a leaderboard you'll need to hold this dictionaries in array.
let scoreDict: [String : Any] = ["name": "John", "score": 500, "date": NSDate()]
let defaults = UserDefaults.standard
let scoresKey = "scores"
var currentScores: [Any] = defaults.array(forKey: scoresKey) ?? []
currentScores.append(scoreDict)
defaults.set(currentScores, forKey: scoresKey)
defaults.synchronize()

Answer 2

I couldn't get as much but I just found that you need to add some elements to your scoreData for the tableview datasource
Here you can add the complete object in UserDefaults
//Make your scoreData as MutableArray
var scoreData = NSMutableArray()
// Record of a user
let user = [
"name" : "John",
"score" : 10,
"id" : 20
] as [String : Any]
scoreData.add(user)
defaults.set(scoreData, forKey: "UserData")
How to fetch them
let userData = defaults.object(forKey: "UserData") as! NSArray
print((userData.object(at: 0) as! [String:Any])["name"] as! String)
print((userData.object(at: 0) as! [String:Any])["score"] as! Int)
print((userData.object(at: 0) as! [String:Any])["id"] as! Int)
I have printed them on console and only the 0th index. You can print them on your Label with indexPath.row elements.
EDIT
In order to add a new record, first Fetch the old data from userDefaults
let newUserData = defaults.object(forKey: "UserData") as! NSArray
Then convert it into mutable array because we want to add a new user record. I could have done it while fetching but on fetching from UserDefaults it gives a immutable object no matter we type cast to NSMutableArray. So convert the newUserData to mutable object
let newUserMutableArray = NSMutableArray(array: newUserData)
Add a new record
// New record
let newUserRecord = [
"name" : "Rajan",
"score" : 20,
"id" : 30
] as [String : Any]
newUserMutableArray.add(newUserRecord)
Save it again
defaults.set(newUserMutableArray, forKey: "UserData")
And again fetch the way it is mentioned above. Now the fetched NSArray will contain two elements.
I still prefer to use core data in this case as the handling will become lot easy.
EDIT
After fetching
scoreDataArray = defaults.object(forKey: "UserData") as! NSArray
Reload your table
self.yourTableView.reloadData()
Your table view datasource methods will be like
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return scoreDataArray.count
}
In your cellForRowAt datasource method
cell.scoreLabel?.text = scoreDataArray.object(at: indexPath.row) as! [String:Any])["score"] as! String