Я пытаюсь сложить все данные суммы и отправить в другую ячейку табличного представления. Я думаю, что мне нужно конвертировать String в Double, прежде чем я смогу это сделать, но я тоже не уверен, как это сделать. Кто-нибудь знает, как вы можете взять сумму данных и представить ее в другом месте? Я очень новичок в Swift и у меня возникли проблемы с выяснением, где мне нужно написать этот код.
import Foundation
struct Income: Codable {
var name: String
var amount: String
init(name: String, amount: String) {
self.name = name
self.amount = amount
}
static let DocumentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
static let ArchiveURL = DocumentsDirectory.appendingPathComponent("incomes").appendingPathExtension("plist")
static func loadSampleIncomes() -> [Income] {
return [
Income(name: "Main Income", amount: "0"),
Income(name: "Secondary Income", amount: "0"),
Income(name: "Interest Income", amount: "0")]
}
static func saveToFile(incomes: [Income]) {
let propertyListEncoder = PropertyListEncoder()
let codedIncomes = try? propertyListEncoder.encode(incomes)
try? codedIncomes?.write(to: ArchiveURL, options: .noFileProtection)
}
static func loadFromFile() -> [Income]? {
guard let codedIncomes = try? Data(contentsOf: ArchiveURL) else { return nil }
let propertyListDecoder = PropertyListDecoder()
return try? propertyListDecoder.decode(Array<Income>.self, from: codedIncomes)
}
}
import UIKit
class IncomeTableViewController: UITableViewController {
var incomes: [Income] = []
override func viewDidLoad() {
super.viewDidLoad()
tableView.tableFooterView = UIView(frame: CGRect.zero)
if let savedIncomes = Income.loadFromFile() {
incomes = savedIncomes
} else {
incomes = Income.loadSampleIncomes()
}
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
tableView.reloadData()
}
// table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return incomes.count
} else {
return 0
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "incomeCell", for: indexPath) as! IncomeTableViewCell
let income = incomes[indexPath.row]
cell.update(with: income)
cell.showsReorderControl = true
return cell
}
// MARK: - Table view delegate
override func tableView(_ tableView: UITableView, editingStyleForRowAt indexPath: IndexPath) -> UITableViewCell.EditingStyle {
return .delete
}
override func tableView(_ tableView: UITableView, commit
editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath:
IndexPath) {
if editingStyle == .delete {
incomes.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath], with: . automatic)
Income.saveToFile(incomes: incomes)
}
}
override func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to: IndexPath) {
let movedIncome = incomes.remove(at: fromIndexPath.row)
incomes.insert(movedIncome, at: to.row)
tableView.reloadData()
}
@IBAction func editButtonTapped(_ sender: UIBarButtonItem) {
let tableViewEditingMode = tableView.isEditing
tableView.setEditing(!tableViewEditingMode, animated: true)
}
// Navigation
@IBAction func unwindToIncomeTableView(segue:UIStoryboardSegue) {
guard segue.identifier == "saveIncomeUnwind",
let sourceViewController = segue.source as? AddEditIncomeTableViewController,
let income = sourceViewController.income else { return }
if let selectedIndexPath = tableView.indexPathForSelectedRow {
incomes[selectedIndexPath.row] = income
tableView.reloadRows(at: [selectedIndexPath],
with: .none)
} else {
let newIndexPath = IndexPath(row: incomes.count, section: 0)
incomes.append(income)
tableView.insertRows(at: [newIndexPath], with: .automatic)
}
Income.saveToFile(incomes: incomes)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "EditIncome" {
let indexPath = tableView.indexPathForSelectedRow!
let income = incomes[indexPath.row]
let navController = segue.destination as! UINavigationController
let addEditIncomeTableViewController = navController.topViewController as! AddEditIncomeTableViewController
addEditIncomeTableViewController.income = income
}
}
}
import UIKit
class AddEditIncomeTableViewController: UITableViewController {
@IBOutlet weak var saveButton: UIBarButtonItem!
@IBOutlet weak var incomeNameTextField: UITextField!
@IBOutlet weak var incomeAmountTextField: UITextField!
var income: Income?
override func viewDidLoad() {
super.viewDidLoad()
if let income = income {
incomeNameTextField.text = income.name
incomeAmountTextField.text = income.amount
}
updateSaveButtonState()
}
override func prepare(for segue: UIStoryboardSegue, sender:
Any?) {
super.prepare(for: segue, sender: sender)
guard segue.identifier == "saveIncomeUnwind" else { return }
let name = incomeNameTextField.text ?? ""
let amount = incomeAmountTextField.text ?? ""
income = Income(name: name, amount: amount)
}
func updateSaveButtonState() {
let nameText = incomeNameTextField.text ?? ""
let amountText = incomeAmountTextField.text ?? ""
saveButton.isEnabled = !nameText.isEmpty && !amountText.isEmpty
}
@IBAction func textEditingChanged(_ sender: UITextField) {
updateSaveButtonState()
}
}
это контроллер табличного представления, в котором я хочу представить новые данные.
import UIKit
class BudgetHomeTableViewController: UITableViewController {
var incomes: [Income] = []
var expenses: [Expense] = []
override func viewDidLoad() {
super.viewDidLoad()
tableView.tableFooterView = UIView(frame: CGRect.zero)
if let savedIncomes = Income.loadFromFile() {
incomes = savedIncomes
} else {
incomes = Income.loadSampleIncomes()
}
if let savedExpenses = Expense.loadFromFile() {
expenses = savedExpenses
} else {
expenses = Expense.loadSampleExpenses()
}
}
}
Это ячейка, в которой данные будут представлены конкретно
import UIKit
class BugetBalanceCell: UITableViewCell {
@IBOutlet weak var budgetBalanceText: UILabel!
var incomes: [Income] = []
var expenses: [Expense] = []
override func awakeFromNib() {
super.awakeFromNib()
let incomeTotal = incomes.map({Double($0.amount) ?? 0}).reduce(0, +)
let expenseTotal = expenses.map({Double($0.amount) ?? 0}).reduce(0, +)
let balance = incomeTotal - expenseTotal
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
