ViewController loading twice xcode iOS - ios

Question

I know what causes it to load twice, but I do not know how to fix the problem. I have looked through many other questions at the same topic, but any of those are matching to my problem.
So here's the code
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
let selectedCell = tableView.cellForRowAtIndexPath(indexPath)! as UITableViewCell
super.performSegueWithIdentifier("TVtoVCSegue", sender: selectedCell)
print("kolm")
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "TVtoVCSegue" {
let otherViewController = segue.destinationViewController as! TTDetailCntr
if let cell = sender as? UITableViewCell, text = cell.textLabel?.text {
otherViewController.CurrentClass = text
}
}
}
As I understand, in tableview function
super.performSegueWithIdentifier("TVtoVCSegue", sender: selectedCell)
Calls out the view to load and the function below itself calls out the view to load,
func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?)
both will load the view so I tried to integrate those methods and I tried to do sth like this:
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
let indexPath = tableView.indexPathForSelectedRow! as NSIndexPath
let selectedCell = tableView.cellForRowAtIndexPath(indexPath)! as UITableViewCell
super.performSegueWithIdentifier("TVtoVCSegue", sender: selectedCell)
if segue.identifier == "TVtoVCSegue" {
let otherViewController = segue.destinationViewController as! TTDetailCntr
if let cell = sender as? UITableViewCell, text = cell.textLabel?.text {
otherViewController.CurrentClass = text
}
}
}
But It says an error if I try to access the view that loaded twice before:
The error comes from the line:
super.performSegueWithIdentifier("TVtoVCSegue", sender: selectedCell)
And the error is:
warning: could not load any Objective-C class information. This will significantly reduce the quality of type information available.
(lldb)
The idea of the code is to get the indexPath value and then pass it to another ViewController

Answer 1

The segue that you've created is most probably from a tableViewCell rather than the UIViewController
Delete the segue and create one from the UIViewController instead.
Ctrl + drag from the circle highlighted in the image to your destination VC.
This will solve this problem.

Answer 2

Here is the SecondviewController that receives the passed data:
class TTDetailCntr: UIViewController {
#IBOutlet var ClassIDLbl: UILabel!
#IBOutlet var TeacherIDlbl: UILabel!
var CurrentClass = ""
override func viewDidLoad() {
super.viewDidLoad()
ClassIDLbl.text = CurrentClass
}

Answer 3

write
self.performSegueWithIdentifier
and check instead of
super.performSegueWithIdentifier
Its working fine with this
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
let selectedCell = tableView.cellForRowAtIndexPath(indexPath)! as UITableViewCell
self.performSegueWithIdentifier("TVtoVCSegue", sender: selectedCell)
print("kolm")
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "TVtoVCSegue" {
let otherViewController = segue.destinationViewController as! SecondViewController
if let cell = sender as? UITableViewCell {
otherViewController.CurrentClass = cell.textLabel?.text
}
}
}
SecondControllerClass.swift
class SecondViewController: UIViewController {
var CurrentClass:String!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}