Crashing when passing Var data as delegates - ios

Question

I have been trying to pass data back to my "HostRideViewController" from my "ProfileViewController" but the data I try to pass back creates a fatal error when unwrapping it, but i dont understand why as the console print out before it shows the correct data
import UIKit
import Foundation
import Firebase
protocol RiderSelectionDelegate {
func selectedRideLeader(firstName:String,lastName:String,uid:String)
}
class ProfileViewController: UIViewController {
#IBOutlet weak var ProfilePictureImageView: UIImageView!
#IBOutlet weak var AddasLeaderBtn: UIButton!
#IBOutlet weak var FirstNameFeild: UILabel!
#IBOutlet weak var LastNameFeild: UILabel!
#IBOutlet weak var UserBioFeild: UILabel!
#IBOutlet weak var HiddenEmail: UILabel!
#IBOutlet weak var HiddenUID: UILabel!
var user: MyUser?
var selectedFirstName: String?
var selectedLastName: String?
var selectedUID: String?
var selectedEmail: String?
var selectionDelegate: RiderSelectionDelegate!
override func viewDidLoad() {
super.viewDidLoad()
/// make profile picture circular
ProfilePictureImageView.layer.cornerRadius = ProfilePictureImageView.frame.size.width/2
ProfilePictureImageView.clipsToBounds = true
/// load user data into view
FirstNameFeild?.text = user?.firstName
LastNameFeild?.text = user?.lastName
HiddenUID?.text = user?.uid
HiddenEmail?.text = user?.email
}
#IBAction func SelectedLeaderpressed(_ sender: Any) {
selectedFirstName = FirstNameFeild.text
selectedLastName = LastNameFeild.text
selectedUID = user?.uid
selectedEmail = user?.email
print(selectedUID!,selectedLastName!,selectedFirstName!)
/// where the error is happening
selectionDelegate.selectedRideLeader(firstName:selectedFirstName!, lastName:selectedLastName!, uid:selectedUID!)
dismiss(animated: true, completion: nil)
}
}
My console output and error from passing data
49s64wH2g7hjiMAKp0uvADkzP0k2 bloggs joe
Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value: file
My intended use of the delegate is to set a label up with the user's name
extension HostRideViewController:RiderSelectionDelegate{
func selectedRideLeader(firstName: String, lastName: String, uid: String) {
OtherRideLeaderLbl.text = firstName
}
}
where am I going wrong as I'm trying to force unwrap the data which is there and present in the print but crashes when I'm trying to delegate it

Answer 1

It seems selectionDelegate is nil you need to set it when you present/push/segue to the destination vc