Swift - Segue to wrong index when UISearchBar is active - ios

Question

I am new to code, and I just can't find the solution to this problem. Most of the answers on the internet are deprecated or unanswered.
I want to search something into my searchbar, after that I want to press on one of the results. When I click on the result I want it to give me the corresponding information in another viewcontroller.
Here's my problem: When I click on a result, the information in the other viewcontroller doesn't correspond with the information that the result gave me. What he does gives me is the information that corresponds to the tableview. So, it segues with a wrong index. Does anyone knows what the solution is?
Here's my code (tableviewcontroller with searchbar):
var myIndex = 0
extension UIColor { //themakleur
static let candyGreen = UIColor(red: 71.0/255.0, green: 81.0/255.0, blue:
89.0/255.0, alpha: 1.0)}
var watjeberekend = ["Omtrek Cirkel","Oppervlakte Cirkel","Lengte
Boog","Oppervlakte Sector","Oppervlakte Bol"]
class scheikunde: UITableViewController, UISearchResultsUpdating {
var scheikundeformules = ["Omtrek Cirkel","Oppervlakte Cirkel","Lengte Boog","Oppervlakte Sector","Oppervlakte Bol"]
var searchcontroller : UISearchController!
var filterednamen = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.searchcontroller = UISearchController(searchResultsController: nil)
self.tableView.tableHeaderView = self.searchcontroller.searchBar
self.searchcontroller.searchResultsUpdater = self
self.searchcontroller.dimsBackgroundDuringPresentation = false
definesPresentationContext = true
self.navigationItem.hidesBackButton = false;
self.navigationController?.isNavigationBarHidden = false
//navigationcontroller layout
navigationController?.navigationBar.barTintColor = UIColor(red: 71.0/255.0, green: 81.0/255.0, blue: 89.0/255.0, alpha: 1.0)
navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.white]
navigationController?.navigationBar.layer.borderColor = UIColor.candyGreen.cgColor
navigationController?.navigationBar.layer.borderWidth = 0
//searchcontroller layout
searchcontroller.searchBar.layer.borderWidth = 0
searchcontroller.searchBar.layer.borderColor = UIColor.candyGreen.cgColor
UISearchBar.appearance().barTintColor = .candyGreen
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).tintColor = .candyGreen
searchcontroller.searchBar.backgroundImage = UIImage(named: "themakleur.jpg")
let cancelButtonAttributes: [String: AnyObject] = [NSForegroundColorAttributeName: UIColor.white]
UIBarButtonItem.appearance(whenContainedInInstancesOf: [UISearchBar.self]).setTitleTextAttributes(cancelButtonAttributes, for: .normal)
}
func updateSearchResults(for searchController: UISearchController) {
self.filterednamen = self.scheikundeformules.filter { (naam : String) -> Bool in
if naam.lowercased().contains(self.searchcontroller.searchBar.text!.lowercased()) {
return true
}else{
return false}}
self.tableView.reloadData()
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if !searchcontroller.isActive || searchcontroller.searchBar.text == "" {
return self.scheikundeformules.count
}else {
return self.filterednamen.count
}
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! Custommath
cell.label.text = scheikundeformules[indexPath.row]
if !searchcontroller.isActive || searchcontroller.searchBar.text == "" {
//cell.textLabel?.text = self.namen[indexPath.row]
cell.label.text = self.scheikundeformules[indexPath.row]
}else{
//cell.textLabel?.text = self.filterednamen[indexPath.row]
cell.label.text = self.filterednamen[indexPath.row]
}
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
myIndex = indexPath.row
performSegue(withIdentifier: "segue", sender: self)
}
}
Here is my code from the viewcontroller:
import UIKit
class scheikundeformule: UIViewController{
#IBOutlet var uitleg6: UILabel!
#IBOutlet var formuleomschrijving: UILabel!
#IBOutlet var uitleg5: UILabel!
#IBOutlet var uitleg4: UILabel!
#IBOutlet var uitleg3: UILabel!
#IBOutlet var uitleg2: UILabel!
#IBOutlet var uitleg1: UILabel!
#IBOutlet var titlelabel: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
titlelabel.text = scheikundeformules[myIndex]
uitleg1.text = uitlegformules2[myIndex]
uitleg2.text = uitlegformules3[myIndex]
uitleg3.text = uitlegformules4[myIndex]
uitleg4.text = uitlegformules5[myIndex]
uitleg5.text = uitlegformules6[myIndex]
uitleg6.text = uitlegformules7[myIndex]
self.navigationItem.hidesBackButton = false;
self.navigationController?.isNavigationBarHidden = false
formuleomschrijving.text = watjeberekend[myIndex]
//keyboard weg deel 1
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(startscreen.dismissKeyboard))
//Uncomment the line below if you want the tap not not interfere and cancel other interactions.
//tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}

Answer 1

Where is your function prepare for segue ? if you want to pass the data to the next view controller you need to send it in the fun prepare for segue, and remember that the indexpath.row needs to be used with the array that is the current datasource of the tableview, the solution will be something like this:
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if let destinationVC = segue.destination as? YourViewController {
if !searchcontroller.isActive {
destinationVC.name = filterednamen[myIndex]
} else {
destinationVC.name = scheikundeformules[myIndex]
} }
}

Answer 2

Add identifier for scheikundeformule view controller in storyboard like below :
Step 1:
Step 2:
change your tableview didSelectRow like below :
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
myIndex = indexPath.row
let scheikundeformuleController = self.storyboard?.instantiateViewController(withIdentifier: "scheikundeformule") as! scheikundeformule
scheikundeformuleController.myIndex = indexPath.row
self.present(scheikundeformuleController, animated: true, completion: nil)
}
Step 3:
You have to add var myIndex = 0 to your scheikundeformule controller. Like below :
class scheikundeformule: UIViewController{
var myIndex = 0
........Your code
}