I am successfully downloading and printing data from Realm database. Here is my log:
Item(id: Optional(0), name: Optional("Item (0)"), descr: Optional("Description of item (0)"),
icon: Optional("http://192.168.1.101:8080/api/items/0/icon.png"),
url: Optional("http://192.168.1.101:8080/api/items/0")))
Now I have to assign those values on actual list and I am getting a clean sheet tableview. How to do it properly? I am using .xib as tablewViewCell. I am thankful for any tips.
class ItemRealm : Object {
dynamic var id = 0
dynamic var name = ""
dynamic var desc = ""
dynamic var icon = ""
override class func primaryKey() -> String? {
return "id"
}
}
class ViewController: UIViewController, UITableViewDataSource, UISearchBarDelegate {
#IBOutlet weak var searchBar: UISearchBar!
#IBOutlet weak var tableView: UITableView!
let realm = try! Realm()
let results = try! Realm().objects(ItemRealm.self).sorted(byKeyPath: "id")
let SERVER_URL = "http://192.168.1.101:8080/api/items"
override func viewDidLoad() {
super.viewDidLoad()
Alamofire.request(SERVER_URL).responseJSON { response in
let items = [Item].from(jsonArray: response.result.value as! [Gloss.JSON])
print(items?[0] as Any)
try! self.realm.write {
for item in items! {
let itemRealm = ItemRealm()
itemRealm.id = item.id!
itemRealm.name = item.name!
itemRealm.desc = item.descr!
itemRealm.icon = item.icon!
self.realm.add(itemRealm)
}
}
_ = self.realm.objects(ItemRealm.self)
// print(items?[0] as Any)
}
// Do any additional setup after loading the view.
tableView.register(UINib(nibName: "TableViewCell", bundle: nil), forCellReuseIdentifier: "TableViewCell")
}
// MARK: - UITableView data source
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return results.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "TableViewCell") as! TableViewCell
var object: ItemRealm
object = self.results[indexPath.row] as ItemRealm
cell.item = object
return cell
}
}
I think you are missing self.tableView.reloadData() after getting data from the response. Consider also assigning fetched data to your results variable.
Related
Here I have a Realm Database which is have some data in it and I want to display it on my Stimulator but it turn out display some other thing. What's wrong in my code?
This is the data of my Realm Database and I also marked the data which I want to display it.
The stimulator which display something like this.
And here is my ViewController.swift code's.
import UIKit
import RealmSwift
class ViewController: UIViewController,UITableViewDataSource { //UITableViewDataSource
#IBOutlet weak var mytableview: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
let realm = try! Realm()
let theItem = realm.objects(Item.self).filter("itemid >= 1")
return theItem.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let realm = try! Realm()
let theItem = realm.objects(Item.self).filter("itemid >= 1")
print(theItem)
let cell = tableView.dequeueReusableCell(withIdentifier: "cell1")
//I suspect the problem is at here...
cell?.textLabel?.text = "\(theItem)"
return cell!
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
}
class Category: Object {
#objc dynamic var name: String?
#objc dynamic var caid: Int = 0
}
class Item: Object {
#objc dynamic var name: String?
#objc dynamic var itemid: Int = 0
#objc dynamic var cateid: Int = 0
}
Your problem is that you need to get the string from the Item object. try something like
"\(theItem.name)".
func getNames() -> [String]{
let items = realm.objects(Item.self).filter("itemid >= 1").toArray(ofType: Item.self ) as [Item]
return items.map { $0.name }
}
extension Results {
func toArray<T>(ofType: T.Type) -> [T] {
var array = [T]()
for i in 0 ..< count {
if let result = self[i] as? T {
array.append(result)
}
}
return array
}
}
I found a way to display the data already. I just need to add indexPath.row in my code and it can handle the data already.
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let realm = try! Realm()
let theItem = realm.objects(Item.self).filter("itemid >= 1")
//I only add below this indexpath
let cellData = theItem[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "cell1")
//and change this part and it's done.
cell?.textLabel?.text = cellData.name
print(theItem)
return cell!
}
I want to reload TableView without tableview.reloadData() method for that i have used MVVM structure so i have attach model class to storyboard and the issue is that my tableview is reload first and then i get all data how should i solved this issue please help me if any one have a solution !!
This is storyboard model attach
Model Code :-
class MovieModel: Decodable{
var artistName: String = ""
var trackName: String = ""
init(artistName: String, trackName: String){
self.artistName = artistName
self.trackName = trackName
}
}
class ResultModel: Decodable{
var results = [MovieModel]()
init(results: [MovieModel]) {
self.results = results
}
}
My ViewModel File code :-
class MovieViewModel: NSObject {
var artistName: String = ""
var trackName: String = ""
var movieModel: MovieModel?
var movieData = [MovieViewModel]()
override init() {
}
init(movie: MovieModel) {
self.artistName = movie.artistName
self.trackName = movie.trackName
}
func getData(){
Service.shareInstance.getAllMovieData { (movie, error) in
if error == nil{
self.movieData = movie?.map({return MovieViewModel(movie: $0)}) ?? []
print(self.movieData)
}else{
print("\(String(describing: error))")
}
}
}
func numberOfRow(section:Int) -> Int{
return movieData.count
}
func cellForRow(indexPath: IndexPath) -> MovieViewModel{
return self.movieData[indexPath.row]
}
}
My ViewController Code :-
class ViewController: UIViewController {
#IBOutlet var movieVM: MovieViewModel?
#IBOutlet var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
self.movieVM?.getData()
}
}
extension ViewController: UITableViewDelegate, UITableViewDataSource{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return movieVM?.numberOfRow(section: section) ?? 0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")
let movie = movieVM?.cellForRow(indexPath: indexPath)
cell?.textLabel?.text = movie?.artistName
cell?.detailTextLabel?.text = movie?.trackName
return cell!
}
}
In my case i am not reload tableview all this is done using ModelClass ! Thank You !!
I am trying to create a one to many relationship, otherwise known as a parent child relationship, in realm. I looked at the documentation that realm offers but I am still a little stuck on how to do the actual saving to realm. I have two views, the main view is a view controller that just has a tableview with the numbers 1-7. In this view i can mass select for editing these rows in the table and save them to realm. That part is no big deal.
On the next view I have something very similar where there is a tableview with just some sample data. There is a mass select rows button, that is fine, it is the save button that I am having trouble with. The data in this tableView, which is the same on all of them just for testing purposes, is data i want to have a child relationship with the data on the first view.
For example if I have 4 saved to realm I click the row with 4 on it and it takes me to my next View. The tableview on this has two rows and other data, but i want to be able to mass select these rows and save them as a child to 4. I am a little confused as to what the save to realm function would look like.
this is my first view controller
import UIKit
import Realm
import RealmSwift
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var tableView: UITableView!
var realm: Realm!
fileprivate var createSaves = SaveClass.createSaves()
var testingBool = false
var values: [String] = []
var valuesTwo: [String] = []
var valuesThree: [String] = []
#IBOutlet weak var itemBtn: UIBarButtonItem!
#IBOutlet weak var saveBtn: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
print(Realm.Configuration.defaultConfiguration.fileURL!)
realm = try! Realm()
self.tableView.delegate = self
self.tableView.dataSource = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return createSaves.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell
cell.txtLbl?.text = "\(createSaves[indexPath.row].label)"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if testingBool == true {
values.append(createSaves[indexPath.row].label)
valuesTwo.append(createSaves[indexPath.row].romanNum)
valuesThree.append(createSaves[indexPath.row].txt)
} else if testingBool == false {
performSegue(withIdentifier: "segue", sender: indexPath)
}
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if testingBool == true {
if let index = values.index(of: createSaves[indexPath.row].label) {
values.remove(at: index)
}
if let index = valuesTwo.index(of: createSaves[indexPath.row].romanNum) {
valuesTwo.remove(at: index)
}
if let index = valuesThree.index(of: createSaves[indexPath.row].txt) {
valuesThree.remove(at: index)
}
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let nxtVC = segue.destination as? TestingViewController
let myIndexPath = self.tableView.indexPathForSelectedRow!
let row = myIndexPath.row
nxtVC?.realmedData = createSaves[row].label
}
#IBAction func btnPressed(_ sender: Any) {
testingBool = !testingBool
if testingBool == true {
tableView.allowsMultipleSelection = true
tableView.allowsMultipleSelectionDuringEditing = true
itemBtn.title = "cancel"
} else if testingBool == false {
tableView.allowsMultipleSelection = false
tableView.allowsMultipleSelectionDuringEditing = false
itemBtn.title = "item"
}
}
#IBAction func saveBtnPressed(_ sender: Any) {
if testingBool == true {
//favorite(label: values)
realmed(label: values, romanNum: valuesTwo, txt: valuesThree)
}
}
func realmed(label: [String], romanNum: [String], txt: [String]) {
try? realm!.write {
for (stringOne, (stringTwo, stringThree)) in zip(label, zip(romanNum, txt)) {
let realmed = Realmed(label: stringOne, romanNum: stringTwo, txt: stringThree)
realm.add(realmed)
}
}
}
}
this is my second view
import UIKit
import Realm
import RealmSwift
class TestingViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
#IBOutlet weak var mainLbl: UILabel!
var realm: Realm!
var realmedData = ""
var testingBool = false
var values: [String] = []
var valuesTwo: [String] = []
#IBOutlet weak var testTable: UITableView!
#IBOutlet weak var selectBtn: UIButton!
#IBOutlet weak var saveBtn: UIButton!
let firstSave = OtherSave.otherArrOne()
override func viewDidLoad() {
super.viewDidLoad()
realm = try! Realm()
self.testTable.delegate = self
self.testTable.dataSource = self
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if objectExists(label: realmedData) == true {
self.mainLbl.text = "\(realmedData)"
} else {
self.mainLbl.text = "Don't Know"
}
}
#IBAction func selectBtnPressed(_ sender: Any) {
testingBool = !testingBool
if testingBool == true {
testTable.allowsMultipleSelection = true
testTable.allowsMultipleSelectionDuringEditing = true
} else if testingBool == false {
testTable.allowsMultipleSelection = false
testTable.allowsMultipleSelectionDuringEditing = false
}
}
#IBAction func saveBtnPressed(_ sender: Any) {
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return firstSave.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell2", for: indexPath) as! TestingTableViewCell
cell.nameLbl.text = "\(firstSave[indexPath.row].name)"
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if testingBool == true {
values.append(firstSave[indexPath.row].info)
valuesTwo.append(firstSave[indexPath.row].name)
}
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
if testingBool == true {
if let index = values.index(of: firstSave[indexPath.row].info) {
values.remove(at: index)
}
if let index = valuesTwo.index(of: firstSave[indexPath.row].name) {
valuesTwo.remove(at: index)
}
}
}
func fetchingLabel(label: String) -> Realmed? {
let realm = try? Realm()
return realm?.object(ofType: Realmed.self, forPrimaryKey: label)
}
func objectExists(label: String) -> Bool {
return realm.object(ofType: Realmed.self, forPrimaryKey: label) != nil
}
}
this is the parent's realm object:
import Foundation
import Realm
import RealmSwift
class Realmed: Object {
#objc dynamic var label = ""
#objc dynamic var romanNum = ""
#objc dynamic var txt = ""
let realmTwo = List<RealmTwo>()
override static func primaryKey() -> String {
return "label"
}
convenience init(label: String, romanNum: String, txt: String) {
self.init()
self.label = label
self.romanNum = romanNum
self.txt = txt
}
}
this is the child's realm object
import Foundation
import UIKit
import Realm
import RealmSwift
class RealmTwo: Object {
#objc dynamic var spanish = String()
#objc dynamic var french = String()
let realmed = LinkingObjects(fromType: Realmed.self, property: "realmTwo")
}
I have tried to do a function similar to the first view controllers:
func realmed(label: [String], romanNum: [String], txt: [String]) {
try? realm!.write {
for (stringOne, (stringTwo, stringThree)) in zip(label, zip(romanNum, txt)) {
let realmed = Realmed(label: stringOne, romanNum: stringTwo, txt: stringThree)
realm.add(realmed)
}
}
}
but I don't really understand how to create an instance of the data that i want to save as an array.
If there is anything i can help with, please ask
Thank you
I assume you want to create “RealmTwo” objects from “values” and “valuesTwo” and add them to a Realmed object .
What you want to do is
Fetch a parent object (Realmed)
Create a child object (RealmTwo)
Append the child to the parent object
You can do that with a function like this.
func save() {
let realmed = fetchingLabel(label: realmedData)! // fetch a parent
do {
try realm.write {
for index in 0..<values.count {
let realmTwo = RealmTwo() // create a child
realmTwo.french = values[index]
realmTwo.spanish = valuesTwo[index]
realmed.realmTwo.append(realmTwo) // append
}
}
} catch {
}
}
I want to pass table cell data (xib file) to table view (also a xib file). I have tried passing the data using the following piece of code but did not get an appropriate result.
PropertyCell.swift
import UIKit
class PropertyCell: UITableViewCell {
#IBOutlet weak var propertyCodeLbl: UILabel!
#IBOutlet weak var addressLbl: UILabel!
}
I have attached the screenshot for PropertyCell below -
PropertyCell.xib
PropertyCell.xib file
PropertyTableVC.swift
import UIKit
import Alamofire
class PropertyTableVC: UITableViewController {
#IBOutlet var propertyTabel: UITableView!
let URL_Landlord_Property_List = "http://127.0.0.1/source/api/LandlordPropertyList.php"
var count: Int = 0
var landlordPropertyArray: [PropertyList]? = []
override func viewDidLoad() {
super.viewDidLoad()
fetchData()
propertyTabel.dataSource = self
propertyTabel.delegate = self
let nibName = UINib(nibName: "PropertyCell", bundle:nil)
self.propertyTabel.register(nibName, forCellReuseIdentifier: "Cell")
}
func fetchData(){
let urlRequest = URLRequest(url: URL(string: URL_Landlord_Property_List)!)
let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
if error != nil{
print(error!)
return
}
print(data!)
self.landlordPropertyArray = [PropertyList]()
self.count = (self.landlordPropertyArray?.count)!
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let datafromjson = json["landlords_property_list"] as? [[String: AnyObject]] {
print(datafromjson)
for data in datafromjson{
var property = PropertyList()
if let id = data["ID"] as? Int,let code = data["Code"] as? String, let address1 = data["Address"] as? String
{
property.id = id
property.code = code
property.address1 = address1
}
self.landlordPropertyArray?.append(property)
}
print(self.landlordPropertyArray)
}
DispatchQueue.main.async {
self.propertyTabel.reloadData()
}
}catch let error {
print(error)
}
}
task.resume()
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (landlordPropertyArray?.count)!
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Configure the cell...
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! PropertyCell
cell.propertyCodeLbl.text = self.landlordPropertyArray?[indexPath.item].code
cell.addressLbl.text = self.landlordPropertyArray?[indexPath.item].address1
return cell
}
}
Attached the screenshot for Property Table below -
PropertyTableVC.xib
PropertyTableVC.xib file
Your TableViewCell :
import UIKit
protocol yourProtocolName { //add protocol here
func getDataFromTableViewCellToViewController (sender : self) //* as you need to pass the table view cell, so pass it as self
}
class PropertyCell: UITableViewCell {
#IBOutlet weak var propertyCodeLbl: UILabel!
#IBOutlet weak var addressLbl: UILabel!
var delegate : yourProtocolName? //set a delegate
override func awakeFromNib() {
super.awakeFromNib()
if delegate != nil {
delegate.getDataFromTableViewCellToViewController(sender :self) *
}
}
}
And your ViewController :
import UIKit
import Alamofire
class PropertyTableVC: UITableViewController,yourProtocolName { //conform to the protocol you created in tableViewCell
#IBOutlet var propertyTabel: UITableView!
let URL_Landlord_Property_List = "http://127.0.0.1/source/api/LandlordPropertyList.php"
var count: Int = 0
var landlordPropertyArray: [PropertyList]? = []
override func viewDidLoad() {
super.viewDidLoad()
fetchData()
propertyTabel.dataSource = self
propertyTabel.delegate = self
let nibName = UINib(nibName: "PropertyCell", bundle:nil)
self.propertyTabel.register(nibName, forCellReuseIdentifier: "Cell")
}
func fetchData(){
let urlRequest = URLRequest(url: URL(string: URL_Landlord_Property_List)!)
let task = URLSession.shared.dataTask(with: urlRequest) { (data, response, error) in
if error != nil{
print(error!)
return
}
print(data!)
self.landlordPropertyArray = [PropertyList]()
self.count = (self.landlordPropertyArray?.count)!
do{
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as! [String: AnyObject]
if let datafromjson = json["landlords_property_list"] as? [[String: AnyObject]] {
print(datafromjson)
for data in datafromjson{
var property = PropertyList()
if let id = data["ID"] as? Int,let code = data["Code"] as? String, let address1 = data["Address"] as? String
{
property.id = id
property.code = code
property.address1 = address1
}
self.landlordPropertyArray?.append(property)
}
print(self.landlordPropertyArray)
}
DispatchQueue.main.async {
self.propertyTabel.reloadData()
}
}catch let error {
print(error)
}
}
task.resume()
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (landlordPropertyArray?.count)!
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
// Configure the cell...
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! PropertyCell
cell.propertyCodeLbl.text = self.landlordPropertyArray?[indexPath.item].code
cell.addressLbl.text = self.landlordPropertyArray?[indexPath.item].address1
return cell
}
func getDataFromTableViewCellToViewController(sender :UITableViewCell) {
//make a callback here
}
}
(*) Marked fields are updated code
Call fetchData() function after tableview delegate and datasource assigning
propertyTabel.dataSource = self
propertyTabel.delegate = self
Updated answer is
Create Cell Class like this
import UIKit
class YourTableViewCell: UITableViewCell {
#IBOutlet weak var profileImageView: UIImageView!
#IBOutlet weak var userNameLabel: UILabel!
#IBOutlet weak var timeDateLabel: UILabel!
override func awakeFromNib() {
super.awakeFromNib()
self.backgroundColor = UIColor.tableViewBackgroundColor()
self.selectionStyle = .none
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
class func cellForTableView(tableView: UITableView, atIndexPath indexPath: IndexPath) -> YourTableViewCell {
let kYourTableViewCell = "YourTableViewCellIdentifier"
tableView.register(UINib(nibName:"RRLoadQuestionsTableViewCell", bundle: Bundle.main), forCellReuseIdentifier: kYourTableViewCell)
let cell = tableView.dequeueReusableCell(withIdentifier: kYourTableViewCell, for: indexPath) as! YourTableViewCell
return cell
}
}
Then create UIViewController Class and place UITableView on it and link with outlet
class YourViewController: UIViewController, UITableViewDataSource, UITableViewDelegate, UITextViewDelegate {
#IBOutlet weak var tableView: UITableView!
var dataSource = [LoadYourData]()
// MARK: - Init & Deinit
override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
super.init(nibName: "YourViewController", bundle: Bundle.main)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
deinit {
NotificationCenter.default.removeObserver(self)
}
override func viewDidLoad() {
super.viewDidLoad()
setupViewControllerUI()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
}
// MARK: - UIViewController Helper Methods
func setupViewControllerUI() {
tableView.estimatedRowHeight = 44.0
tableView.rowHeight = UITableViewAutomaticDimension
tableView.delegate = self
tableView.dataSource = self
loadData()
}
func loadData() {
// Write here your API and reload tableview once you get response
}
// MARK: - UITableView Data Source
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dataSource.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = YourTableViewCell.cellForTableView(tableView: tableView, atIndexPath: indexPath)
// assign here cell.name etc from dataSource
return cell
}
I have a ViewController in my app where I have to show Settings to the user and user can turn the Settings on or off using UISwitch. I have to store the settings in the local db and based on that display data to user in app.
I am using SugarRecord for Core Data Management. Initially all the settings are turned on.
SugarRecordManager.swift
import Foundation
import SugarRecord
import CoreData
class SugarRecordManager
{
static let sharedInstance = SugarRecordManager()
private init(){
}
// Initializing CoreDataDefaultStorage
func coreDataStorage() -> CoreDataDefaultStorage {
let store = CoreDataStore.named("db")
let bundle = Bundle(for: type(of: self))
let model = CoreDataObjectModel.merged([bundle])
let defaultStorage = try! CoreDataDefaultStorage(store: store, model: model)
return defaultStorage
}
//MARK:- User Settings methods
//update local settings
func updateSettingsModel(userSettings: [UserSetting]){
let db = self.coreDataStorage()
for localSetting in userSettings{
try! db.operation { (context, save) -> Void in
if let settingObjectToUpdate = try! context.request(UserSetting.self).filtered(with: "groupName", equalTo: localSetting.groupName!).fetch().first{
settingObjectToUpdate.groupId = localSetting.groupId! as String
settingObjectToUpdate.groupName = localSetting.groupName! as String
settingObjectToUpdate.isGroupActive = localSetting.isGroupActive
try! context.insert(settingObjectToUpdate)
save()
}
}
}
}
//retrieve settings from storage
func getAllSettings() -> [UserSetting] {
let db = self.coreDataStorage()
var userSettings : [UserSetting]
do {
userSettings = try db.fetch(FetchRequest<UserSetting>())
} catch {
userSettings = []
}
return userSettings
}
//initialise settings for the first time
func initialiseUserSettings(){
let db = self.coreDataStorage()
var groupNameArray = UserDefaults.standard.value(forKey: "groupNamesArrayKey") as? [String]
var groupIdArray = UserDefaults.standard.value(forKey: "groupIdsArrayKey") as? [String]
for i in 0 ..< groupIdArray!.count {
try! db.operation { (context, save) -> Void in
let settingObject: UserSetting = try! context.new()
settingObject.groupId = groupIdArray?[i];
settingObject.groupName = groupNameArray?[i];
settingObject.isGroupActive = true;
try! context.insert(settingObject)
save()
}
}
}
}
SettingsViewController.swift
class SettingsViewController: BaseViewController, UITableViewDataSource, UITableViewDelegate, SettingsCellDelegate {
#IBOutlet weak var btnSideNav: UIBarButtonItem!
#IBOutlet weak var settingsTable: UITableView!
var userSetting = [UserSetting]() //array to hold settings from storage
override func viewDidLoad() {
super.viewDidLoad()
self.automaticallyAdjustsScrollViewInsets = false;
btnSideNav.target = revealViewController();
btnSideNav.action = #selector(SWRevealViewController.revealToggle(_:));
userSetting = SugarRecordManager.sharedInstance.getAllSettings() //here userSetting contains data and I have checked it
self.settingsTable.reloadData()
self.settingsTable.dataSource = self;
self.settingsTable.delegate = self;
// Do any additional setup after loading the view.
}
//MARK:- Table View Methods
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
print("Count of cells = \(self.userSetting.count)") //prints 18 which is good
return self.userSetting.count
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 60;
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let settingsCell : SettingsCell? = tableView.dequeueReusableCell(withIdentifier: "SettingsCell") as? SettingsCell;
settingsCell?.setUpWithModel(model: self.userSetting[indexPath.row], cell: settingsCell!)
settingsCell?.delegate = self as SettingsCellDelegate;
return settingsCell!
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
}
func didTappedSwitch(cell: SettingsCell) {
let indexPath = settingsTable.indexPath(for: cell);
userSetting[(indexPath?.row)!].isGroupActive? = cell.isGroupActive.isOn as NSNumber
}
#IBAction func btnSaveTapped(_ sender: UIButton) {
// code to save settings
}
}
SettingsCell.swift
protocol SettingsCellDelegate {
func didTappedSwitch(cell: SettingsCell)
}
class SettingsCell: UITableViewCell {
#IBOutlet weak var groupName: UILabel!
#IBOutlet weak var lblGroupId: UILabel!
#IBOutlet weak var isGroupActive: UISwitch!
var delegate: SettingsCellDelegate!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
func setUpWithModel(model: UserSetting, cell: SettingsCell)
{
cell.groupName.text = model.groupName;
cell.lblGroupId.text = model.groupId;
isGroupActive.setOn((model.isGroupActive?.boolValue)!, animated: false)
}
#IBAction func isGroupActiveValueChanged(_ sender: UISwitch) {
delegate.didTappedSwitch(cell: self)
}
}
Now, initally the TableView is populated and all arrays are working fine but as soon as I scroll the TableView all data is gone. Even the userSetting array is nill. I know it's something to do with context but can't figure out what. Any help would be greatly appreciated.
Change your func coreDataStorage() -> CoreDataDefaultStorage like this
// Initializing CoreDataDefaultStorage
lazy var coreDataStorage: CoreDataDefaultStorage = {
let store = CoreDataStore.named("db")
let bundle = Bundle(for: type(of: self))
let model = CoreDataObjectModel.merged([bundle])
let defaultStorage = try! CoreDataDefaultStorage(store: store, model: model)
return defaultStorage
}()
you have this problem because you re-init CoreDataDefaultStorage each time when you do any request.
After you made it lazy - you will have only one CoreDataDefaultStorage for all app life
Basically, it will be good to make coreDataStorage as singleton