realm selectedRowAtIndexPath using segue showing different results - swift

Question

it is my first time using segment control and realm. so currently I am using segue to perform segue to Add/EditVC for modification of data.
when segue performed and took data to Add/EditVC to variable selectedTransaction, I want as following data to to be filled accordingly
/* selectedTransaction print statement Results */
print("selectedTransaction = \(selectedTransaction!)")
selectedTransaction = Transaction {
categoryType = Category {
type = expense;
name = EXPENSE 3;
};
amount = 1000;
date = April 2;
}
amountTF.text = selectedTransaction.amount (done and correct)
categorySCoutlet.selectedSegmentIndex = selectedTransaction.categoryType.type (fail to show segmentindex at selectedTransaction.categoryType.type)
categoryTF.text = selectedTransaction.categoryType.name (name shown correctly, however will return nil if user did not RESELECT again)
I was expecting all data are shown as if it created.
However, I faced 2 issue in getting it done
SegmentControl selected index are always in 0 instead of selectedTransaction.categoryType.name (I want the segment control to be at the index which is as created)
categoryTF.text are showing correctly, but if I did not choose again and leave as it be. It will auto return back to nil in results when I pressed the saveButton. : I wish categoryTF.text will return as created and value will not change even if I did not touch it and clicked saveButton
In gif shown below, I chosen row2 as sample. and the result in Realm Browser showing as it is.
I only changed the amountTF.text information from 1200 to 2000, which in result realm browser will set the result of cateogoryType in segmentcontrol to "income" and category will return to nil
sample of the workflow
//Data Model
//MARK: - Transaction Category Section
enum CategoryType : String, CaseIterable {
case income = "income"
case expense = "expense"
init?(id : Int) {
if id < CategoryType.allCases.count {
self = CategoryType.allCases[id]
} else {
return nil
}
}
}
class Category : Object {
#objc dynamic var type : String = CategoryType.income.rawValue
#objc dynamic var name : String = ""
// let parentCategory = LinkingObjects(fromType: Transaction.self, property: "ofCategory")
convenience init(type:CategoryType, name: String) {
self.init()
self.type = type.rawValue
self.name = name
}
}
/* VC that should read and load all data to required place */
//edit
var selectedTransaction : Transaction!
#IBOutlet weak var amountTF: UITextField!
//PickerView for keyboard
lazy var pickerView : UIPickerView = UIPickerView()
//Segment Control
#IBOutlet weak var categorySCoutlet: UISegmentedControl!
#IBOutlet weak var categoryTF: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
amountTF.text! = selectedTransaction.amount
categoryTF.text! = selectedTransaction.categoryType!.name
setupPicker()
}
#IBAction func categoryTypeSC(_ sender: UISegmentedControl) {
guard let type = CategoryType(id: sender.selectedSegmentIndex) else {
fatalError("error")
}
currentCategories = categories.filter("type == %#", type.rawValue)
categoryTF.text = currentCategories.first?.name
pickerView.reloadAllComponents()
pickerView.selectRow(1, inComponent: 0, animated: true)
}
//MARK:- Add Transaction Btn
#IBAction func addTransButtonTapped(_ sender: UIButton) {
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
super.touchesBegan(touches, with: event)
if touches.first?.view == view {
categoryTF.resignFirstResponder()
}
}
//MARK:- Picker Helper
func setupPicker() {
currentCategories = categories.filter("type == %#", CategoryType.income.rawValue)
categoryTF.inputView = pickerView
pickerView.delegate = self
pickerView.dataSource = self
categorySCoutlet.setTitle("Income", forSegmentAt: 0)
categorySCoutlet.setTitle("Expense", forSegmentAt: 1)
categorySCoutlet.addTarget(self, action: #selector(categoryTypeSC(_:)), for: .valueChanged)
}

Answer 1

You are calling tableView.deselectRow(at: indexPath, animated: false) in your tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) method.
This results in returning the incorrect indexPath in prepareForSegue.
You should either remove the deselectRow call from didSelectRowAtIndexPath method,
or you should create a property to hold the value of indexPath.
Something like this:
// somewhere in your class
var selectedIndexPath: IndexPath?
then
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let selectedRowForTrans : Transaction = getTransactions[indexPath.row]
selectedIndexPath = indexPath // set the value of selectedIndexPath
tableView.deselectRow(at: indexPath, animated: false)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if (segue.identifier == "editTrans") {
if let indexPath = selectedIndexPath { // check if there is a valid indexPath
let editTransVC = segue.destination as! AddTransactionTableViewController
let selectedRowForTrans : Transaction = getTransactions[indexPath.row]
editTransVC.selectedTransaction = selectedRowForTrans
}
}
}
Hope this helps