number of rows contained in existing section after update (15) must equal - ios

Question

So i'm building an app as a hobby and have researched, it appears a few people have a similar problem, except mine happens when inserting the data to begin with. So I think it's slightly different.
When I go to insert data into my array and table it returns an error (title), it retrieves the right amount of current count, but struggled to add a new one.
class AccountsViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
#IBOutlet weak var totalLabel: UILabel!
#IBOutlet weak var tableview: UITableView!
#IBOutlet weak var tableview2: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
//Set the table background as the image
tableview.backgroundView = UIImageView(image: UIImage(named: "splasnowords-1.png"))
//Use the edit button item provided by the table view controller
navigationItem.leftBarButtonItem = editButtonItem
//self.navigationItem.leftBarButtonItem = self.editButtonItem;
//Calculate the latest totalstandings
BudgetDataModel.calculateTotalStandings()
totalLabel.text = ("Total Current Standings = £\(BudgetDataModel.returnTrueValue(number: BudgetDataModel.total))")
self.tableview.delegate = self
self.tableview2.delegate = self
self.tableview.dataSource = self
self.tableview2.dataSource = self
}
// MARK: - Table view data source
func numberOfSections(in tableView: UITableView) -> Int {
if (tableView == tableview){
return 1
//BudgetDataModel.budgets.count
}
else{
return 2
//SavingsDataModel.savings.count
}
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String?{
//reload data?
if (tableView == tableview){
return "Budgets"
}
else{
return "Savings"
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
var rowCount = 0
if (tableView == self.tableview) {
rowCount = BudgetDataModel.budgets.count
}
if (tableView == self.tableview2) {
rowCount = SavingsDataModel.savings.count
}
return rowCount
// #warning Incomplete implementation, return the number of rows
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
//Table view cells are reused and should be dequeued using a cell identifier.
if (tableView == self.tableview){
let cellIdentifier = "AccountsTableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! AccountsTableViewCell
let budget = BudgetDataModel.budgets[(indexPath as NSIndexPath).row]
cell.nameLabel.text = budget.name
cell.amountLabel.text = ("£\(BudgetDataModel.returnTrueValue(number: budget.amount))")
cell.backgroundColor = UIColor(white: 1, alpha: 0.5)
return cell
}
else if (tableView == self.tableview2){
let cellIdentifier = "SavingsTableViewCell"
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! SavingsTableViewCell
let saving = SavingsDataModel.savings[(indexPath as NSIndexPath).row]
cell.savingsnameLabel.text = saving.savingname
cell.savingsamountLabel.text = ("£\(BudgetDataModel.returnTrueValue(number: saving.savingamount))")
cell.backgroundColor = UIColor(white: 1, alpha: 0.5)
return cell
}
else { preconditionFailure ("unexpected cell type") }
}
// Override to support conditional editing of the table view.
func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
// Return false if you do not want the specified item to be editable.
return true
}
// Override to support editing the table view.
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
if (tableView == tableview){
// Delete the row from the data source
BudgetDataModel.budgets.remove(at: indexPath.row)
BudgetDataModel.saveBudgets()
BudgetDataModel.calculateTotalStandings()
totalLabel.text = ("Total Current Standings = £\(BudgetDataModel.returnTrueValue(number:BudgetDataModel.total))")
// self.tableview.reloadData()
tableView.deleteRows(at: [indexPath], with: .fade)
}
else if (tableView == tableview2){
// Delete the row from the data source
SavingsDataModel.savings.remove(at: indexPath.row)
SavingsDataModel.saveSavings()
//implement BudgetDataModel.calculateTotalStandings()
//implement totalLabel.text = ("Total Current Standings = £\(BudgetDataModel.returnTrueValue(number:BudgetDataModel.total))")
//self.tableview2.reloadData()
tableView.deleteRows(at: [indexPath], with: .fade)
}
} else if editingStyle == .insert {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
// Override to support rearranging the table view.
func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
}
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "ShowDetail"{
let budgetDetailViewController = segue.destination as! BudgetViewController
//Get the cell that generated this segue.
if let selectedBudgetCell = sender as? AccountsTableViewCell {
let indexPath = tableview.indexPath(for: selectedBudgetCell)!
let selectedBudget = BudgetDataModel.budgets[indexPath.row]
budgetDetailViewController.budget = selectedBudget
}
}
else if segue.identifier == "AddItem"{
//self.tableview.reloadData()
print("Adding new budget.")
}
else if segue.identifier == "ShowSavings"{
let savingDetailViewController = segue.destination as! SavingsViewController
//Get the cell that generated this segue.
if let selectedSavingsCell = sender as? SavingsTableViewCell {
let indexPath = tableview2.indexPath(for: selectedSavingsCell)!
let selectedSavings = SavingsDataModel.savings[indexPath.row]
savingDetailViewController.saving = selectedSavings
}
}
else if segue.identifier == "AddSaving"{
//self.tableview2.reloadData()
print ("Adding new saving.")
}
}
//MARK: Actions
#IBAction func unwindToBudgetList(_ sender: UIStoryboardSegue){
if let sourceViewController = sender.source as? BudgetViewController, let budget = sourceViewController.budget {
if let selectedIndexPath = tableview.indexPathForSelectedRow{
//Update an existing budget.
BudgetDataModel.budgets[selectedIndexPath.row] = budget
tableview.reloadRows(at: [selectedIndexPath], with: .none)
}
else{
//Add a new budget
let newIndexPath = IndexPath(row:BudgetDataModel.budgets.count, section: 0)
BudgetDataModel.budgets.append(budget)
tableview.insertRows(at: [newIndexPath as IndexPath], with: .bottom)
}
//Save the budgets.
BudgetDataModel.saveBudgets()
BudgetDataModel.calculateTotalStandings()
totalLabel.text = ("Total Current Standings = £\(BudgetDataModel.returnTrueValue(number: BudgetDataModel.total))")
}
}
#IBAction func unwindtoSavingsList(_ sender: UIStoryboardSegue){
if let sourceViewController = sender.source as? SavingsViewController, let savings = sourceViewController.saving {
if let selectedIndexPath = tableview2.indexPathForSelectedRow{
//Update an existing budget.
SavingsDataModel.savings[selectedIndexPath.row] = savings
tableview2.reloadRows(at: [selectedIndexPath], with: .none)
}
else{
//Add a new saving
let newIndexPath = IndexPath(row:SavingsDataModel.savings.count, section: 1)
SavingsDataModel.savings.append(savings)
//tableview2.reloadData()
tableview2.insertRows(at: [newIndexPath as IndexPath], with: .bottom)
}
//Save the budgets.
SavingsDataModel.saveSavings()
//implement SavingsDataModel.calculateTotalStandings()
// totalLabel.text = ("Total Current Standings = £\(BudgetDataModel.returnTrueValue(number: BudgetDataModel.total))")
}
}
}

Answer 1

Thanks #jcaron
Two corrections required:
Change my numberofsectionscode to return 1, so that my second table didn't have a randomly replicated second section
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
Replace the section with 0, when adding a new saving
//Add a new saving
let newIndexPath = IndexPath(row:SavingsDataModel.savings.count, section: 1)