I am trying to get three items in a single tableview cell just like the picture.
I want the app to look exactly like the picture.
Image(CLICK ME) What I want it to look like
I have tried to do this a million different way but cant seem to figure out the correct way to do it, the app completely crash right now.
Need some help as i am a beginner to swift, i am still learning but for some reason this has been a challenge.
import UIKit
class ViewController: UIViewController, UIAdaptivePresentationControllerDelegate {
#IBOutlet weak var tableView: UITableView!
var items:[Product]? = []
// VIEW LOAD
override func viewDidLoad() {
super.viewDidLoad()
if #available(iOS 13.0, *) {
self.isModalInPresentation = true
}
getData()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
getData()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(true)
storeData()
}
override var prefersStatusBarHidden: Bool {
return true
}
// ADD ITEMS
#IBAction func addButtonTapped(_ sender: Any) {
let alert = UIAlertController(title: "Product Information", message: nil, preferredStyle: .alert)
alert.addTextField { (itemTextField) in
itemTextField.placeholder = "Item"
}
alert.addTextField { (priceTextField) in
priceTextField.placeholder = "Price"
}
alert.addTextField { (salePriceTextField) in
salePriceTextField.placeholder = "Sale Price"
}
let action = UIAlertAction(title: "Add", style: .default) { (_) in
let item = alert.textFields?[0].text ?? ""
let price = alert.textFields?[1].text ?? ""
let salesPrice = alert.textFields?[2].text ?? ""
let product = Product(item: item, price: price, salesPrice: salesPrice)
self.addProduct(product)
}
alert.addAction(action)
present(alert, animated: true)
storeData()
}
func addProduct(_ product: Product) {
let index = 0
items?.insert(product, at: index)
let indexPath = IndexPath(row: index, section: 0)
tableView.insertRows(at: [indexPath], with: .left)
storeData()
}
//STORE DATA
func storeData() {
UserDefaultUtil.saveData(products: items)
}
func getData() {
items = UserDefaultUtil.loadProducts()
}
}
//EXTENSION
extension ViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items!.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
let product = items![indexPath.row]
cell.textLabel?.text = "\(product.item!) \(product.price) \(product.salesPrice)"
cell.contentView.backgroundColor = UIColor(red:0.92, green:0.92, blue:0.92, alpha:1.0)
cell.textLabel?.textColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
tableView.separatorColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
guard editingStyle == .delete else { return }
items?.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
storeData()
}
}
class UserDefaultUtil {
private static let Key = "savedData"
private static func archivePeople(people : [Product]) -> NSData {
return NSKeyedArchiver.archivedData(withRootObject: people as NSArray) as NSData
}
static func loadProducts() -> [Product]? {
if let unarchivedObject = UserDefaults.standard.object(forKey: Key) as? Data {
return NSKeyedUnarchiver.unarchiveObject(with: unarchivedObject as Data) as? [Product]
}
return nil
}
static func saveData(products : [Product]?) {
let archivedObject = archivePeople(people: products!)
UserDefaults.standard.set(archivedObject, forKey: Key)
UserDefaults.standard.synchronize()
}
}
class Product: NSObject, NSCoding {
var item: String?
var price: String?
var salesPrice: String?
required init(item:String, price:String, salesPrice: String) {
self.item = item
self.price = price
self.salesPrice = salesPrice
}
required init(coder aDecoder: NSCoder) {
self.item = aDecoder.decodeObject(forKey: "item") as? String
self.price = aDecoder.decodeObject(forKey: "price") as? String
self.salesPrice = aDecoder.decodeObject(forKey: "salesPrice") as? String
}
public func encode(with aCoder: NSCoder) {
aCoder.encode(item, forKey: "item")
aCoder.encode(price, forKey: "price")
aCoder.encode(salesPrice, forKey: "salesPrice")
}
}
import UIKit
class ViewController: UIViewController, UIAdaptivePresentationControllerDelegate {
#IBOutlet weak var tableView: UITableView!
var items = [Product]()
// VIEW LOAD
override func viewDidLoad() {
super.viewDidLoad()
if #available(iOS 13.0, *) {
self.isModalInPresentation = true
}
getData()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
getData()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(true)
storeData()
}
override var prefersStatusBarHidden: Bool {
return true
}
// ADD ITEMS
#IBAction func addButtonTapped(_ sender: Any) {
let alert = UIAlertController(title: "Product Information", message: nil, preferredStyle: .alert)
alert.addTextField(configurationHandler: { (itemTextField) -> Void in
itemTextField.placeholder = "Item"
})
alert.addTextField(configurationHandler: { (priceTextField) -> Void in
priceTextField.placeholder = "Price"
})
alert.addTextField(configurationHandler: { (salePriceTextField) -> Void in
salePriceTextField.placeholder = "Sale Price"
})
alert.addAction(UIAlertAction(title: "Add", style: .default) { (action) in
let item = alert.textFields?[0].text ?? ""
let price = alert.textFields?[1].text ?? ""
let salesPrice = alert.textFields?[2].text ?? ""
let product = Product(item: item, price: price, salesPrice: salesPrice)
self.addProduct(product)
})
self.present(alert, animated: true, completion: nil)
storeData()
}
func addProduct(_ product: Product) {
items.append(product)
tableView.reloadData()
storeData()
}
//STORE DATA
func storeData() {
UserDefaultUtil.saveData(products: items)
}
func getData() {
if let data = UserDefaults.standard.data(forKey: "savedData"), let unarchivedObject = NSKeyedUnarchiver.unarchiveObject(with: data) as? [Product] {
items = unarchivedObject
}
}
}
//EXTENSION
extension ViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
let product = items[indexPath.row]
cell.textLabel?.text = "\(product.item!) \(product.price) \(product.salesPrice)"
cell.contentView.backgroundColor = UIColor(red:0.92, green:0.92, blue:0.92, alpha:1.0)
cell.textLabel?.textColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
tableView.separatorColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
guard editingStyle == .delete else { return }
items.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
storeData()
}
}
class UserDefaultUtil {
private static let Key = "savedData"
private static func archivePeople(people : [Product]) -> NSData {
return NSKeyedArchiver.archivedData(withRootObject: people as NSArray) as NSData
}
static func saveData(products : [Product]?) {
let archivedObject = archivePeople(people: products!)
UserDefaults.standard.set(archivedObject, forKey: Key)
UserDefaults.standard.synchronize()
}
}
class Product: NSObject, NSCoding {
var item: String?
var price: String?
var salesPrice: String?
required init(item:String, price:String, salesPrice: String) {
self.item = item
self.price = price
self.salesPrice = salesPrice
}
required init(coder aDecoder: NSCoder) {
self.item = aDecoder.decodeObject(forKey: "item") as? String
self.price = aDecoder.decodeObject(forKey: "price") as? String
self.salesPrice = aDecoder.decodeObject(forKey: "salesPrice") as? String
}
public func encode(with aCoder: NSCoder) {
aCoder.encode(item, forKey: "item")
aCoder.encode(price, forKey: "price")
aCoder.encode(salesPrice, forKey: "salesPrice")
}
}
Total Profit Calculate
import UIKit
class ViewController: UIViewController, UIAdaptivePresentationControllerDelegate {
#IBOutlet weak var tableView: UITableView!
var items = [Product]()
// VIEW LOAD
override func viewDidLoad() {
super.viewDidLoad()
if #available(iOS 13.0, *) {
self.isModalInPresentation = true
}
getData()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
getData()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(true)
storeData()
}
override var prefersStatusBarHidden: Bool {
return true
}
// ADD ITEMS
#IBAction func addButtonTapped(_ sender: Any) {
let alert = UIAlertController(title: "Product Information", message: nil, preferredStyle: .alert)
alert.addTextField(configurationHandler: { (itemTextField) -> Void in
itemTextField.placeholder = "Item"
})
alert.addTextField(configurationHandler: { (priceTextField) -> Void in
priceTextField.placeholder = "Price"
})
alert.addTextField(configurationHandler: { (salePriceTextField) -> Void in
salePriceTextField.placeholder = "Sale Price"
})
alert.addAction(UIAlertAction(title: "Add", style: .default) { (action) in
let item = alert.textFields?[0].text ?? ""
let price = alert.textFields?[1].text ?? ""
let salesPrice = alert.textFields?[2].text ?? ""
let profit = Double(salesPrice)! - Double(price)!
let TotalProfit = profit
let product = Product(item: item, price: price, salesPrice: salesPrice, TotalProfit: TotalProfit)
self.addProduct(product)
})
self.present(alert, animated: true, completion: nil)
storeData()
}
func addProduct(_ product: Product) {
items.append(product)
tableView.reloadData()
storeData()
}
//STORE DATA
func storeData() {
UserDefaultUtil.saveData(products: items)
}
func getData() {
if let data = UserDefaults.standard.data(forKey: "savedData"), let unarchivedObject = NSKeyedUnarchiver.unarchiveObject(with: data) as? [Product] {
items = unarchivedObject
}
}
}
//EXTENSION
extension ViewController: UITableViewDataSource{
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
let product = items[indexPath.row]
cell.textLabel?.text = "\(product.item!) \(String(describing: product.price)) \(String(describing: product.salesPrice))"
cell.detailTextLabel?.text = "Total Profit \(product.TotalProfit)"
cell.contentView.backgroundColor = UIColor(red:0.92, green:0.92, blue:0.92, alpha:1.0)
cell.textLabel?.textColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
tableView.separatorColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
guard editingStyle == .delete else { return }
items.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: .fade)
storeData()
}
}
class UserDefaultUtil {
private static let Key = "savedData"
private static func archivePeople(people : [Product]) -> NSData {
return NSKeyedArchiver.archivedData(withRootObject: people as NSArray) as NSData
}
static func saveData(products : [Product]?) {
let archivedObject = archivePeople(people: products!)
UserDefaults.standard.set(archivedObject, forKey: Key)
UserDefaults.standard.synchronize()
}
}
class Product: NSObject, NSCoding {
var item: String?
var price: String?
var salesPrice: String?
var TotalProfit: Double?
init(item:String, price:String, salesPrice: String ,TotalProfit: Double ) {
self.item = item
self.price = price
self.salesPrice = salesPrice
self.TotalProfit = TotalProfit
}
required init(coder aDecoder: NSCoder) {
self.item = aDecoder.decodeObject(forKey: "item") as? String
self.price = aDecoder.decodeObject(forKey: "price") as? String
self.salesPrice = aDecoder.decodeObject(forKey: "salesPrice") as? String
self.TotalProfit = aDecoder.decodeObject(forKey: "TotalProfit") as? Double
}
public func encode(with aCoder: NSCoder) {
aCoder.encode(item, forKey: "item")
aCoder.encode(price, forKey: "price")
aCoder.encode(salesPrice, forKey: "salesPrice")
aCoder.encode(TotalProfit, forKey: "TotalProfit")
}
}
Related
I am trying to get the inputted text from recipeName, servingsNumber, prepTime and cookTime to save to fb.
I know this is close to where I need to be. I am need some help with my save function. I need to assign the textField.text in sendToFirebase() I am able to print out the inputted text into the console and I was able to get it to save a document to FB but the entry was null. What am I missing? I feel like it is here in my code:
import UIKit
import Firebase
class AddRecipeViewController: UIViewController {
#IBOutlet weak var table: UITableView!
#IBOutlet weak var saveButton: UIBarButtonItem!
let db = Firestore.firestore()
var id = UUID().uuidString
var data = [RecipeData]()
let user = Auth.auth().currentUser?.email
var objRecipe = RecipeData.init()
override func viewDidLoad() {
super.viewDidLoad()
table.delegate = self
table.dataSource = self
navigationItem.hidesBackButton = true
let newBackButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelPressed))
self.navigationItem.leftBarButtonItem = newBackButton
table.register(UINib(nibName: "RecipeNameCell", bundle: nil), forCellReuseIdentifier: "recipeName")
table.register(UINib(nibName: "ServingSizeTableViewCell", bundle: nil), forCellReuseIdentifier: "servings")
table.register(UINib(nibName: "PrepTimeTableViewCell", bundle: nil), forCellReuseIdentifier: "prep")
table.register(UINib(nibName: "CookTimeTableViewCell", bundle: nil), forCellReuseIdentifier: "cook")
}
func sendToFirebase() {
do {
let recipeName = objRecipe.recipeName
let servings = objRecipe.servingsNumber
let prep = objRecipe.prepTime
let cook = objRecipe.cookTime
let user = Auth.auth().currentUser?.email
let id = objRecipe.id
let data = try JSONEncoder().encode(objRecipe)
let dictionary = (try? JSONSerialization.jsonObject(with: data)) as? [String: Any] ?? [:]
db.collection("Recipe").document(objRecipe.id).setData(dictionary)
}
catch {
print(error)
}
}
#objc func cancelPressed(sender: UIBarButtonItem) {
navigationController?.popViewController(animated: true)
dismiss(animated: true, completion: nil)
}
#IBAction func savePressed(_ sender: UIBarButtonItem) {
sendToFirebase()
}
}
extension AddRecipeViewController: UITableViewDelegate, UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 4
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.row == 0 {
let cell = table.dequeueReusableCell(withIdentifier: "recipeName", for: indexPath) as! RecipeNameCell
cell.textField.delegate = self
cell.textField.tag = indexPath.row
return cell
}
else if indexPath.row == 1 {
let cell = table.dequeueReusableCell(withIdentifier: "servings", for: indexPath) as! ServingSizeTableViewCell
cell.textField.delegate = self
cell.textField.tag = indexPath.row
return cell
}
else if indexPath.row == 2 {
let cell = table.dequeueReusableCell(withIdentifier: "prep", for: indexPath) as! PrepTimeTableViewCell
cell.textField.delegate = self
cell.textField.tag = indexPath.row
return cell
}
else if indexPath.row == 3{
let cell = table.dequeueReusableCell(withIdentifier: "cook", for: indexPath) as! CookTimeTableViewCell
cell.textField.delegate = self
cell.textField.tag = indexPath.row
return cell
}
else {
let cell = table.dequeueReusableCell(withIdentifier: "recipeName", for: indexPath) as! RecipeNameCell
return cell
}
}
}
extension AddRecipeViewController: UITextFieldDelegate {
func textFieldDidEndEditing(_ textField: UITextField) {
switch textField.tag {
case 0:
let recipeName = textField.text!
print(recipeName)
objRecipe.recipeName = textField.text!
// sendToFirebase() // Send to firebase
case 1:
let servingSize = textField.text!
print(servingSize)
objRecipe.servingsNumber = textField.text!
// sendToFirebase() // Send to firebase
case 2:
let prepTime = textField.text!
print(prepTime)
objRecipe.prepTime = textField.text!
// sendToFirebase() // Send to firebase
case 3:
let cookTime = textField.text!
print(cookTime)
objRecipe.cookTime = textField.text!
// sendToFirebase() // Send to firebase
default: break
}
}
}
struct RecipeData: Codable {
var user: String?
var recipeName: String?
var ingredientsText: String?
var directionsText: String?
var servingsNumber: String?
var prepTime: String?
var cookTime: String?
var image: String?
let id = UUID().uuidString
}
class RecipeNameCell: UITableViewCell {
#IBOutlet weak var textField: UITextField!
var id = UUID().uuidString
let db = Firestore.firestore()
var name: String?
override func awakeFromNib() {
super.awakeFromNib()
textField.placeholder = "Recipe Name..."
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
}
func saveData(text: String) {
if let recipeName = recipeNameTextField.text,
let addedIngredients = ingredientsTextField.text,
let directionsText = directionsTextField.text,
let servingsNum = numServingLabel.text,
let image = imageView.image,
let user = Auth.auth().currentUser?.email {
let newRecipeRef = db.collection(D.FStore.collectionName).document(id)
newRecipeRef.setData([
D.FStore.recipeTextField: recipeName,
D.FStore.ingredientsText: addedIngredients,
D.FStore.directionsText: directionsText,
D.FStore.numberServings: servingsNum,
D.FStore.userField: user,
D.FStore.id: id,
D.FStore.image: image,
]) { err in
if let err = err {
print("Error adding document: \(err)")
} else {
print("Document added with ID:\(newRecipeRef)")
}
}
}
}
import UIKit
import Firebase
class HomeScreenViewController: UIViewController {
#IBOutlet weak var table: UITableView!
#IBOutlet weak var logout: UIBarButtonItem!
#IBOutlet weak var add: UIBarButtonItem!
let db = Firestore.firestore()
var data = [RecipeData]()
var recipeNamed: String?
override func viewDidLoad() {
super.viewDidLoad()
table.delegate = self
table.dataSource = self
navigationItem.hidesBackButton = true
table.register(UINib(nibName: "RecipeCell", bundle: nil), forCellReuseIdentifier: "cell")
}
func loadRecipeNames() {
db.collection("Recipe")
.addSnapshotListener { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
let data = document.data()
if let user = data["User"] as? String,
let recipeNameLabels = data["Recipe Name"] as? String,
let prep = data["Prep Time"] as? String,
let cook = data["Cook Time"] as? String,
let servings = data["Servings"] as? String
{
let newRecipe = RecipeData(user: user, recipeName: recipeNameLabels, servingsNumber: servings, prepTime: prep, cookTime: cook)
self.data.append(newRecipe)
}
DispatchQueue.main.async {
self.table.reloadData()
}
}
}
}
}
#IBAction func logoutPress(_ sender: UIBarButtonItem) {
do {
try Auth.auth().signOut()
navigationController?.popToRootViewController(animated: true)
} catch let signOutError as NSError {
print("Error signing out: %#", signOutError)
}
}
#IBAction func addRecipePressed(_ sender: UIBarButtonItem) {
performSegue(withIdentifier: "add", sender: self)
}
}
extension HomeScreenViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let data = data[indexPath.row]
let cell = table.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! RecipeCell
cell.recipeNameLabel.text = data.recipeName
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
performSegue(withIdentifier: "DetailSegue", sender: self)
}
}
You need to fire the sendToFirebase() function:
extension AddRecipeViewController: UITextFieldDelegate {
func textFieldDidEndEditing(_ textField: UITextField) {
switch textField.tag {
case 0:
let recipeName = textField.text!
print(recipeName)
objRecipe.recipeName = textField.text!
sendToFirebase() // Send to firebase
case 1:
let servingSize = textField.text!
print(servingSize)
objRecipe.servingsNumber = textField.text!
sendToFirebase()
case 2:
let prepTime = textField.text!
print(prepTime)
objRecipe.prepTime = textField.text!
sendToFirebase()
case 3:
let cookTime = textField.text!
print(cookTime)
objRecipe.cookTime = textField.text!
sendToFirebase()
default: break
}
}
}
sendToFirebase() function:
func sendToFirebase() {
let recipeName = objRecipe.recipeName
let servings = objRecipe.servingsNumber
let prep = objRecipe.prepTime
let cook = objRecipe.cookTime
let user = Auth.auth().currentUser?.email
let newRecipeRef = db.collection("Recipe").document(objRecipe.id)
newRecipeRef.setData([
"Recipe Name" : recipeName ?? "Empty",
"Serving #" : servings ?? "Empty",
"Prep Time" : prep ?? "Empty",
"Cook Time" : cook ?? "Empty",
"User" : user ?? "No email provided",
])
{ err in
if let err = err {
print("Error adding document: \(err)")
} else {
print("Document added with ID:\(newRecipeRef)")
}
}
}
I'm trying to save data to the core data and then display it on another view controller. I have a table view with custom cell, which have a button. I've created a selector, so when we tap on the button in each of the cell, it should save all the data from the cell. Here is my parent view controller:
import UIKit
import SafariServices
import CoreData
class ViewController: UIViewController, UISearchBarDelegate {
#IBOutlet weak var pecodeTableView: UITableView!
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var savedNews = [SavedNews]()
var newsTitle: String?
var newsAuthor: String?
var urlString: String?
var newsDate: String?
var isSaved: Bool = false
private var articles = [Article]()
private var viewModels = [NewsTableViewCellViewModel]()
private let searchVC = UISearchController(searchResultsController: nil)
override func viewDidLoad() {
super.viewDidLoad()
pecodeTableView.delegate = self
pecodeTableView.dataSource = self
pecodeTableView.register(UINib(nibName: S.CustomCell.customNewsCell, bundle: nil), forCellReuseIdentifier: S.CustomCell.customCellIdentifier)
fetchAllNews()
createSearchBar()
loadNews()
saveNews()
countNewsToCategory()
}
#IBAction func goToFavouritesNews(_ sender: UIButton) {
performSegue(withIdentifier: S.Segues.goToFav, sender: self)
}
private func fetchAllNews() {
APICaller.shared.getAllStories { [weak self] result in
switch result {
case .success(let articles):
self?.articles = articles
self?.viewModels = articles.compactMap({
NewsTableViewCellViewModel(author: $0.author ?? "Unknown", title: $0.title, subtitle: $0.description ?? "No description", imageURL: URL(string: $0.urlToImage ?? "")
)
})
DispatchQueue.main.async {
self?.pecodeTableView.reloadData()
}
case .failure(let error):
print(error)
}
}
}
private func createSearchBar() {
navigationItem.searchController = searchVC
searchVC.searchBar.delegate = self
}
}
extension ViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 120
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return viewModels.count
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: S.CustomCell.customCellIdentifier, for: indexPath) as! CustomNewsCell
cell.configure(with: viewModels[indexPath.row])
cell.saveNewsBtn.tag = indexPath.row
cell.saveNewsBtn.addTarget(self, action: #selector(didTapCellButton(sender:)), for: .touchUpInside)
return cell
}
#objc func didTapCellButton(sender: UIButton) {
guard viewModels.indices.contains(sender.tag) else { return }
print("Done")// check element exist in tableview datasource
if !isSaved {
saveNews()
print("success")
}
//Configure selected button or update model
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let article = articles[indexPath.row]
guard let url = URL(string: article.url ?? "") else {
return
}
let vc = SFSafariViewController(url: url)
present(vc, animated: true)
}
//Search
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
guard let text = searchBar.text, !text.isEmpty else {
return
}
APICaller.shared.Search(with: text) { [weak self] result in
switch result {
case .success(let articles):
self?.articles = articles
self?.viewModels = articles.compactMap({
NewsTableViewCellViewModel(author: $0.author ?? "Unknown", title: $0.title, subtitle: $0.description ?? "No description", imageURL: URL(string: $0.urlToImage ?? "")
)
})
DispatchQueue.main.async {
self?.pecodeTableView.reloadData()
self?.searchVC.dismiss(animated: true, completion: nil)
}
case .failure(let error):
print(error)
}
}
}
}
extension ViewController {
func loadNews() {
let request: NSFetchRequest<SavedNews> = SavedNews.fetchRequest()
do {
let savedNews = try context.fetch(request)
//Handle saved news
if savedNews.count > 0 {
isSaved = true
}
} catch {
print("Error fetching data from context \(error)")
}
}
func saveNews() {
//Initialize the context
let news = SavedNews(context: self.context)
//Putting data
news.title = newsTitle
news.author = newsAuthor
news.publishedAt = newsDate
news.url = urlString
do {
try context.save()
} catch {
print("Error when saving data \(error)")
}
}
func countNewsToCategory() {
//Initialize the context
let request: NSFetchRequest<SavedNews> = SavedNews.fetchRequest()
let predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [
])
request.predicate = predicate
do {
savedNews = try context.fetch(request)
} catch {
print("Error fetching data from category \(error)")
}
}
}
I don't know where is the problem, I've created a correct data model, but data could not be saved. Here is my model:
import Foundation
struct APIResponse: Codable {
let articles: [Article]
}
struct Article: Codable {
let author: String?
let source: Source
let title: String
let description: String?
let url: String?
let urlToImage: String?
let publishedAt: String
}
struct Source: Codable {
let name: String
}
And also my model in Core Data:
My second view controller, to which I want display the data:
import UIKit
import CoreData
class FavouriteNewsViewController: UIViewController {
#IBOutlet weak var favTableView: UITableView!
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
var savedNews = [SavedNews]()
override func viewDidLoad() {
super.viewDidLoad()
favTableView.delegate = self
favTableView.delegate = self
loadSavedNews()
favTableView.register(UINib(nibName: S.FavouriteCell.favouriteCell, bundle: nil), forCellReuseIdentifier: S.FavouriteCell.favouriteCellIdentifier)
// Do any additional setup after loading the view.
}
}
extension FavouriteNewsViewController: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return savedNews.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = favTableView.dequeueReusableCell(withIdentifier: S.FavouriteCell.favouriteCellIdentifier, for: indexPath) as! FavouritesCell
print(savedNews)
let article = savedNews[indexPath.row]
if let articleTitle = article.title {
cell.favTitle.text = articleTitle
}
if let articleAuthor = article.author {
cell.favAuthor.text = articleAuthor
}
if let articleDesc = article.desc {
cell.favDesc.text = article.desc
}
return cell
}
}
extension FavouriteNewsViewController {
func loadSavedNews() {
let request: NSFetchRequest<SavedNews> = SavedNews.fetchRequest()
do {
savedNews = try context.fetch(request)
} catch {
print("Error fetching data from context \(error)")
}
}
func deleteNews(at indexPath: IndexPath) {
// Delete From NSObject
context.delete(savedNews[indexPath.row])
// Delete From current News list
savedNews.remove(at: indexPath.row)
// Save deletion
do {
try context.save()
} catch {
print("Error when saving data \(error)")
}
}
}
you did not assign your properties that you are trying to save
newsTitle,newsAuthor,newsDate,urlString
seems these properties have nil value . make sure these properties have valid value before save .
I get
Referencing instance method 'encode' on 'Array' requires that '(item: String?, price: String?, salesPrice: String?)' conform to 'Encodable' "
this error in the storeData() function. Did I even save the tuple correctly in user defaults? If anyone can help that would be great!Any help is appreciated!
import UIKit
let defaults = UserDefaults(suiteName: "com.Saving.Data")
struct Product: Codable {
var title: String
var price: String
var salePrice: String
}
class ViewController: UIViewController {
#IBOutlet weak var tableView: UITableView!
var items: [(item: String?, price: String?, salesPrice: String?)] = []
override func viewDidLoad() {
super.viewDidLoad()
getData()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(true)
getData()
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(true)
storeData()
}
override var prefersStatusBarHidden: Bool {
return true
}
#IBAction func addButtonTapped(_ sender: Any) {
let alert = UIAlertController(title: "Product Information", message: nil, preferredStyle: .alert)
alert.addTextField { (itemTF) in
itemTF.placeholder = "Item"
}
alert.addTextField { (textField) in
textField.placeholder = "Price"
}
alert.addTextField { (textField) in
textField.placeholder = "Sale Price"
}
let action = UIAlertAction(title: "Add", style: .default) { (_) in
var product : (item: String, price: String, salesPrice: String) = ("","","")
if let textField1 = alert.textFields?[0], let text = textField1.text {
print(text)
product.item = text
}
if let textField2 = alert.textFields?[1], let text = textField2.text {
print(text)
product.price = text
}
if let textField3 = alert.textFields?[2], let text = textField3.text {
print(text)
product.salesPrice = text
}
self.add(product)
}
alert.addAction(action)
present(alert, animated: true)
storeData()
}
func add(_ product: (item: String, price: String, salesPrice: String)) {
let index = 0
items.insert(product, at: index)
let indexPath = IndexPath(row: index, section: 0)
tableView.insertRows(at: [indexPath], with: .left)
storeData()
}
func storeData() {
if let data = try? PropertyListEncoder().encode(items) {
UserDefaults.standard.set(data, forKey: "savedData")
}
}
func getData() {
if let data = UserDefaults.standard.data(forKey: "savedData") {
let items = try! PropertyListDecoder().decode([Product].self, from: data)
print(items)
}
}
}
extension ViewController: UITableViewDataSource {
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell()
let product = items[indexPath.row]
cell.textLabel?.text = product.item
print(product.price ?? "")
print(product.salesPrice ?? "")
cell.contentView.backgroundColor = UIColor(red:0.92, green:0.92, blue:0.92, alpha:1.0)
cell.textLabel?.textColor = UIColor(red:0.13, green:0.13, blue:0.13, alpha:1.0)
tableView.separatorColor = UIColor(red:0.92, green:0.92, blue:0.92, alpha:1.0)
return cell
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
guard editingStyle == .delete else { return }
items.remove(at: indexPath.row)
tableView.reloadData()
storeData()
}
}
As already mentioned in the comments it's incomprehensible why you use an extra tuple with the same design as your struct Product. This causes your problems.
So get rid of the tuple.
Declare items
var items = [Product]()
Replace the alert action with
let action = UIAlertAction(title: "Add", style: .default) { _ in
let item = alert.textFields?[0].text ?? ""
let price = alert.textFields?[1].text ?? ""
let salesPrice = alert.textFields?[2].text ?? ""
let product = Product(item: item, price: price, salesPrice: salesPrice)
self.addProduct(product)
}
Replace add with
func addProduct(_ product: Product) {
let index = 0
items.insert(product, at: index)
let indexPath = IndexPath(row: index, section: 0)
tableView.insertRows(at: [indexPath], with: .left)
storeData()
}
Replace getData with
func getData() {
if let data = UserDefaults.standard.data(forKey: "savedData") {
do {
items = try PropertyListDecoder().decode([Product].self, from: data)
print(items)
tableView.reloadData()
} catch { print(error) }
}
}
Side note: Be aware that the code saves the data in standard UserDefaults, not in your custom suite.
And finally – not related to the issue – to get a nice animation in tableView:commit editingStyle: replace
tableView.reloadData()
with
tableView.deleteRows(at: [indexPath], with: .fade)
How can I update or insert a row in a tableview without reloading all the data?
In the ClientsViewController a list of clients is shown alphabetically and separated by sections (first letter of the client`s name).
When I update a client, the tableview shows 2 entries (old and new one) of the same client. When I try to add a client, it crashes.
I think the problem is with indexing.
class ClientsViewController: UITableViewController {
var sortedFirstLetters: [String] = []
var sections: [[Client]] = [[]]
var tableArray = [Client]()
var client: Client?
var refresher: UIRefreshControl!
#IBOutlet var noClientsView: UIView!
#IBAction func unwindToClients(sender: UIStoryboardSegue) {
if let sourceViewController = sender.source as? ClientViewController, let client = sourceViewController.client {
if let selectedIndexPath = tableView.indexPathForSelectedRow {
// Update an existing client.
tableArray[selectedIndexPath.row] = client
tableView.reloadRows(at: [selectedIndexPath], with: .automatic)
}
else {
// Add a client.
let newIndexPath = IndexPath(row: tableArray.count, section: 0)
tableArray.append(client)
tableView.insertRows(at: [newIndexPath], with: .automatic)
}
let firstLetters = self.tableArray.map { $0.nameFirstLetter }
let uniqueFirstLetters = Array(Set(firstLetters))
self.sortedFirstLetters = uniqueFirstLetters.sorted()
self.sections = self.sortedFirstLetters.map { firstLetter in
return self.tableArray
.filter { $0.nameFirstLetter == firstLetter }
.sorted { $0.name < $1.name }
}
// DispatchQueue.main.async {
// self.tableView.reloadData()
// }
}
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let secondScene = segue.destination as! ClientViewController
if segue.identifier == "ShowDetail", let indexPath = self.tableView.indexPathForSelectedRow {
let currentPhoto = sections[indexPath.section][indexPath.row]
secondScene.client = currentPhoto
}
else if segue.identifier == "AddItem" {
print("add")
}
else {
fatalError("The selected cell is not being displayed by the table")
}
}
#objc func handleRefresh(_ refreshControl: UIRefreshControl) {
getClients()
refreshControl.endRefreshing()
}
}
extension ClientsViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.refreshControl?.addTarget(self, action: #selector(ClientsViewController.handleRefresh(_:)), for: UIControlEvents.valueChanged)
tableView.backgroundView = noClientsView
getClients() //for only the 1st time ==> when view is created ==> ok ish
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(true)
getClients() // not a good idea to make a request to the server everytime the view appears on the screen.
}
override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
if(self.tableArray.count > 0) {
return sortedFirstLetters[section]
}
else {
return ""
}
}
override func sectionIndexTitles(for tableView: UITableView) -> [String]? {
print(sortedFirstLetters)
return sortedFirstLetters
}
override func numberOfSections(in tableView: UITableView) -> Int {
return sections.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let name = sections[indexPath.section][indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "ClientCell", for: indexPath)
cell.textLabel?.text = name.name
cell.detailTextLabel?.text = name.city + " - " + name.province
return cell
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if(sections[section].count > 0) {
tableView.backgroundView = nil
}
return sections[section].count
}
func getClients() {
makeRequest(endpoint: "api/clients/all",
parameters: [:],
completionHandler: { (container : ApiContainer<Client>?, error : Error?) in
if let error = error {
print("error calling POST on /getClients")
print(error)
return
}
self.tableArray = (container?.result)!
self.prepareData()
DispatchQueue.main.async {
self.tableView.reloadData()
}
} )
}
//sorts and makes the index
func prepareData() {
let firstLetters = self.tableArray.map { $0.nameFirstLetter }
let uniqueFirstLetters = Array(Set(firstLetters))
self.sortedFirstLetters = uniqueFirstLetters.sorted()
self.sections = self.sortedFirstLetters.map { firstLetter in
return self.tableArray
.filter { $0.nameFirstLetter == firstLetter }
.sorted { $0.name < $1.name }
}
}
}
Bellow is ClientViewController and Client struct.
class ClientViewController: UITableViewController, UIPickerViewDelegate, UIPickerViewDataSource {
#IBOutlet weak var nameTextField: UITextField!
#IBOutlet weak var addressTextField: UITextField!
#IBOutlet weak var cityTextField: UITextField!
#IBOutlet weak var provinceTextField: UITextField!
#IBOutlet weak var postalCodeTextField: UITextField!
#IBOutlet weak var contactsLabel: UILabel!
let numberOfRowsAtSection: [Int] = [4, 2]
var client: Client?
var selectedProvince: String?
override func viewWillAppear(_ animated: Bool) {
self.title = "New"
if (client?.client_id) != nil {
self.title = "Edit"
nameTextField.text = client?.name
provinceTextField.text = client?.province
cityTextField.text = client?.city
addressTextField.text = client?.address
postalCodeTextField.text = client?.postal_code
selectedProvince = client?.province
}
}
#objc func save(sender: UIButton!) {
let name = nameTextField.text ?? ""
let address = addressTextField.text ?? ""
let city = cityTextField.text ?? ""
let province = selectedProvince ?? ""
let postal_code = postalCodeTextField.text ?? ""
var endPoint: String
if (client?.client_id) != nil {
endPoint = "api/clients/update"
} else {
endPoint = "api/clients/add"
}
client = Client(name:name, client_id: client?.client_id, postal_code: postal_code, province: province, city: city, address: address)
let requestBody = makeJSONData(client)
makeRequestPost(endpoint: endPoint,
requestType: "POST",
requestBody: requestBody,
view: view,
completionHandler: { (response : ApiContainer<Client>?, error : Error?) in
if let error = error {
print("error calling POST on /todos")
print(error)
return
}
let b = (response?.meta)!
let a = (response?.result[0])
let client_id = a?.client_id
self.client?.client_id = client_id
if(b.sucess == "yes") {
//change message and use the custom func like on error.
let alert = UIAlertController(title: "Success!", message: "All good", preferredStyle: .alert)
let OKAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: {
(_)in
self.performSegue(withIdentifier: "unwindToClients", sender: self)
})
alert.addAction(OKAction)
DispatchQueue.main.async(execute: {
self.present(alert, animated: true, completion: nil)
})
}
else
{
self.showAlert(title: "Error", message: "Error Creating Client")
//return
}
} )
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.sectionHeaderHeight = 50.0;
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Save", style: .plain, target: self, action: #selector(save))
let thePicker = UIPickerView()
provinceTextField.inputView = thePicker
thePicker.delegate = self
// ToolBar
let toolBar = UIToolbar()
toolBar.barStyle = .default
toolBar.isTranslucent = true
toolBar.tintColor = UIColor(red: 92/255, green: 216/255, blue: 255/255, alpha: 1)
toolBar.sizeToFit()
// Adding Button ToolBar
let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(ClientDetailViewController.doneClick))
let spaceButton = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(ClientDetailViewController.cancelClick))
toolBar.setItems([cancelButton, spaceButton, doneButton], animated: false)
toolBar.isUserInteractionEnabled = true
provinceTextField.inputAccessoryView = toolBar
}
#objc func doneClick() {
provinceTextField.resignFirstResponder()
}
#objc func cancelClick() {
provinceTextField.resignFirstResponder()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var rows: Int = 0
if section < numberOfRowsAtSection.count {
rows = numberOfRowsAtSection[section]
}
return rows
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let backItem = UIBarButtonItem()
backItem.title = "Client"
navigationItem.backBarButtonItem = backItem
if segue.identifier == "unwindToClients",
let destination = segue.destination as? ClientsViewController
{
destination.client = client
}
if segue.identifier == "showContacts",
let destination = segue.destination as? ContactsViewController
{
destination.client = client
}
}
// MARK: - Picker view
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView( _ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return provinces.count
}
func pickerView( _ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return provinces[row].name
}
func pickerView( _ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
provinceTextField.text = provinces[row].name
}
}
struct Client: Codable {
var client_id: Int!
let name: String!
let postal_code: String!
let province: String!
let city: String!
let address: String!
init(name: String, client_id: Int! = nil, postal_code: String, province: String, city: String, address: String) {
self.client_id = client_id
self.name = name
self.postal_code = postal_code
self.province = province
self.city = city
self.address = address
}
var nameFirstLetter: String {
return String(self.name[self.name.startIndex]).uppercased()
}
}
Append the items in datasource at index where you want to insert row in table. than follow steps 2,3,4.
Call method tbl.beginupdate
call insertRowsAtIndexPaths method of table view
Call tbl.endupdate
you can update tableView rows using this..
self.tableView.reloadRows(at: [indexPath!], with: .top)
I've googled and read a lot of questions and answers about this topic, however I still can't solve my problem. I have a project connected to firebase, with a tableView connected to that information. The following error pops up:
unexpectedly found nil while unwrapping an Optional value.
I've checked all my connections between UIButtons, UILabels and such, and most of all i have tried using breakpoints to locate the error. However I can't seem to get my head around a solution. Here comes code and messages from the project and the error:
#IBOutlet weak var addButton: UIBarButtonItem!
let listToUsers = "ListToUsers"
var backgroundNr = 0
var items: [GroceryItem] = []
let ref = FIRDatabase.database().reference(withPath: "grocery-items")
let usersRef = FIRDatabase.database().reference(withPath: "online")
var user: User!
var userCountBarButtonItem: UIBarButtonItem!
var counter = 1
override func viewDidLoad() {
super.viewDidLoad()
if user?.email == "tor#gmail.com" {
addButton.isEnabled = false
}
tableView.allowsMultipleSelectionDuringEditing = false
userCountBarButtonItem = UIBarButtonItem(title: "1",
style: .plain,
target: self,
action: #selector(userCountButtonDidTouch))
userCountBarButtonItem.tintColor = UIColor.white
navigationItem.leftBarButtonItem = userCountBarButtonItem
usersRef.observe(.value, with: { snapshot in
if snapshot.exists() {
self.userCountBarButtonItem?.title = snapshot.childrenCount.description
} else {
self.userCountBarButtonItem?.title = "0"
}
})
ref.queryOrdered(byChild: "completed").observe(.value, with: { snapshot in
var newItems: [GroceryItem] = []
for item in snapshot.children {
let groceryItem = GroceryItem(snapshot: item as! FIRDataSnapshot)
newItems.append(groceryItem)
}
self.items = newItems
self.tableView.reloadData()
})
FIRAuth.auth()!.addStateDidChangeListener { auth, user in
guard let user = user else { return }
self.user = User(authData: user)
let currentUserRef = self.usersRef.child(self.user!.uid)
currentUserRef.setValue(self.user!.email)
currentUserRef.onDisconnectRemoveValue()
}
}
// MARK: UITableView Delegate methods
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath) as! SubjectTableViewCell
let groceryItem = items[indexPath.row]
if backgroundNr == 0 {
cell.backgroundColor = UIColor(red: 222/255, green: 164/255, blue: 50/255, alpha: 0.6)
backgroundNr += 1
} else {
cell.backgroundColor = UIColor.white
backgroundNr -= 1
}
cell.textLabel?.text = groceryItem.name
cell.detailTextLabel?.text = groceryItem.addedByUser
toggleCellCheckbox(cell, isCompleted: groceryItem.completed)
return cell
}
override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
return true
}
override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
let groceryItem = items[indexPath.row]
groceryItem.ref?.removeValue()
}
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
guard let cell = tableView.cellForRow(at: indexPath) else { return }
let groceryItem = items[indexPath.row]
let toggledCompletion = !groceryItem.completed
toggleCellCheckbox(cell, isCompleted: toggledCompletion)
groceryItem.ref?.updateChildValues([
"completed": toggledCompletion
])
}
func toggleCellCheckbox(_ cell: UITableViewCell, isCompleted: Bool) {
if !isCompleted {
cell.accessoryType = .none
cell.textLabel?.textColor = UIColor.black
cell.detailTextLabel?.textColor = UIColor.black
} else {
cell.accessoryType = .checkmark
cell.textLabel?.textColor = UIColor.gray
cell.detailTextLabel?.textColor = UIColor.gray
}
}
// MARK: Add Item
#IBAction func addButtonTapped(_ sender: Any) {
let alert = UIAlertController(title: "Kunskaps Område",
message: "Lägg till objekt",
preferredStyle: .alert)
let saveAction = UIAlertAction(title: "Spara",
style: .default) { _ in
// 1
guard let textField = alert.textFields?.first,
let text = textField.text else { return }
// 2
let groceryItem = GroceryItem(name: text,
addedByUser: self.user!.email,
completed: false)
// 3
let groceryItemRef = self.ref.child(text.lowercased())
// 4
groceryItemRef.setValue(groceryItem.toAnyObject())
}
let cancelAction = UIAlertAction(title: "Cancel",
style: .default)
alert.addTextField()
alert.addAction(saveAction)
alert.addAction(cancelAction)
present(alert, animated: true, completion: nil)
}
func userCountButtonDidTouch() {
performSegue(withIdentifier: listToUsers, sender: nil)
}
#IBAction func startClockTapp(_ sender: Any) {
Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(GroceryListTableViewController.updateCounter), userInfo: nil, repeats: true)
}
func updateCounter() {
counter += 1
let clock = String(counter)
print(clock)
let clockCurrent = Clock(name: clock, addedByUser: self.user!.email)
let clockCurrentRef = self.ref.child(clock.lowercased())
clockCurrentRef.setValue(clockCurrent.toAnyObject())
}
When using breakpoints to locate where the error occurs, it seems that it is located in the following function: (the first line of code in "UITable view delegate methods)
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return items.count
}
I don't now if I'm using the breakpoints wrong, however that's the result I get, if it helps.
The "grocery" objects struct file´s code is the following:
import Foundation
import Firebase
struct GroceryItem {
let key: String
let name: String
let addedByUser: String
let ref: FIRDatabaseReference?
var completed: Bool
init(name: String, addedByUser: String, completed: Bool, key: String = "") {
self.key = key
self.name = name
self.addedByUser = addedByUser
self.completed = completed
self.ref = nil
}
init(snapshot: FIRDataSnapshot) {
key = snapshot.key
let snapshotValue = snapshot.value as! [String: AnyObject]
name = snapshotValue["name"] as! String
addedByUser = snapshotValue["addedByUser"] as! String
completed = snapshotValue["completed"] as! Bool
ref = snapshot.ref
}
func toAnyObject() -> Any {
return [
"name": name,
"addedByUser": addedByUser,
"completed": completed
]
}
}
The database content on Firebase gets structured as following:
educationlevel-e230e
grocery-items
Fysik:, addedByUser:, completed:
The full string of the basic error message:
fatal error: unexpectedly found nil while unwrapping an Optional value
2016-12-24 01:22:54.799117 EducationLevel[1077:263810]
fatal error:
unexpectedly found nil while unwrapping an Optional value
I really can't find the answer to this problem by my self or anywhere on the web, REALLY appreciates it if I could get some help (sorry for the probably bad english, I'm from Sweden;) )
(If you need more strings from the error message or anything like that I'll immediately update this question)
Thanks!! Tor from Sweden.