Passing Firebase database reference data - swift

Question

I'm looking to pass an array that contains user info pulled from Firebase from one controller to another using a segue. I'm able to do it when everything is in a tableview, but not when it's in a regular controller view. Can someone help plz?
View Controller
var userArray = [User]()
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "showGuestView" {
let guestVC = segue.destination as! GuestUserViewController
guestVC.ref = userArray.ref //this would work using userArray[indexPath.row].ref if it was a tableview
//ref represents DatabaseReference?
}
}
DatabaseClass.fetchUser() { (user) in
if let user = user {
self.userArray.append(user)
}
Database Class
func fetchUser(completion: #escaping (User?)->()){
let currentUser = Auth.auth().currentUser!
let postRef = Database.database().reference().child("getinfo").child(currentUser.uid)
postRef.observe(.value, with: { (snapshot) in
for childSnapshot in snapshot.children.allObjects as! [DataSnapshot] {
let request = childSnapshot.key
let userRef = self.databaseRef.child("users").child(request)
userRef.observeSingleEvent(of: .value, with: { (currentUser) in
let user: User = User(snapshot: currentUser)
completion(user)
})
}
})
}
User Structure
struct User {
var firstname: String!
var uid: String!
var ref: DatabaseReference!
init(firstname: String, uid: String){
self.firstname = firstname
self.uid = uid
self.ref = Database.database().reference()
}
init(snapshot: DataSnapshot){
if let snap = snapshot.value as? [String:Any] {
self.firstname = snap["firstname"] as! String
self.uid = snap["uid"] as! String
}
self.ref = snapshot.ref
}
func toAnyObject() -> [String: Any]{
return ["firstname":self.firstname, "uid":self.uid]
}
}

Answer 1

I can see userArray is an array of users, hence you could not use userArray.ref because the array doesn't have any property like ref in its definition. In the table view, it is working because you pulled a user object and then passed ref.
Try to get a selected user instance before passing to the guest view controller.
let user = userArray[selected user index];
guestVC.ref = user.ref