Send array from custom cell to another view controller - arrays

Question

i'm running a query to Firebase and the results are displaying in a custom cell. The cell has a UIButton that when tapped it goes to another view controller where the user can enter info. The question i have is, how do i send the array in the custom cell to the next view controller? i need to send the array so i can reference the subcollection of info i'm going to add for each array. Segue is working properly, when i print to the console, the array is empty "nil". Any help is greatly appreciated.
Custom Cell
import UIKit
import Firebase
protocol PatCellCommentsDelegate {
func patCommentBtnTapped (ptcomments: [Comment])
}
class PatdataCell: UITableViewCell {
#IBOutlet weak var ptnameLbl: UILabel!
#IBOutlet weak var dobLbl: UILabel!
#IBOutlet weak var finLbl: UILabel!
#IBOutlet weak var officemdLbl: UILabel!
#IBOutlet weak var assignedmdLbl: UILabel?
#IBOutlet weak var appnameLbl: UILabel!
#IBOutlet weak var assigneddateLbl: UILabel!
#IBOutlet weak var roomnumberLbl: UILabel?
#IBOutlet weak var diagnosesLbl: UILabel!
#IBOutlet weak var reasonforadmitorconsultLbl: UILabel!
#IBOutlet weak var goalofhospitalizationLbl: UILabel!
#IBOutlet weak var seenoseeLbl: UILabel?
#IBOutlet weak var notestocboLbl: UILabel!
#IBOutlet weak var numCommentsLbl: UILabel!
#IBOutlet weak var hospitalLbl: UILabel!
#IBOutlet weak var teamLbl: UILabel!
#IBOutlet weak var addCommentBtn: UIButton!
var ptdata: PTData!
var ptcomments = [Comment]()
var delegate: PatCellCommentsDelegate?
override func awakeFromNib() {
super.awakeFromNib()
}
func configurePatDataCell(ptdata: PTData, delegate:
PatCellCommentsDelegate) {
self.ptdata = ptdata
self.delegate = delegate
ptnameLbl.text = ptdata.ptname
dobLbl.text = ptdata.dob
finLbl.text = ptdata.fin
officemdLbl.text = ptdata.officemd
assignedmdLbl?.text = ptdata.assignedmd
appnameLbl.text = ptdata.app
assigneddateLbl.text = ptdata.assigneddate
roomnumberLbl?.text = ptdata.room
diagnosesLbl.text = ptdata.diagnoses
reasonforadmitorconsultLbl.text = ptdata.reasonforadmitorconsult
goalofhospitalizationLbl.text = ptdata.goalofhospitalization
seenoseeLbl?.text = ptdata.seenosee
notestocboLbl.text = ptdata.notestocbo
numCommentsLbl.text = ptdata.comments
hospitalLbl.text = ptdata.hosp
teamLbl.text = ptdata.team
}
#IBAction func addCommentBtnTapped(_ sender: Any) {
//trying to send data to commentsVC from this cell
delegate?.patCommentBtnTapped(ptcomments: self.ptcomments)
}
}
View Controller
import UIKit
import Firebase
import SVProgressHUD
class PatdataVC: UIViewController, UITableViewDelegate,
UITableViewDataSource, PatCellCommentsDelegate {
#IBOutlet weak var patDataTableView: UITableView!
var ptdatas = [PTData]()
var ptComments = [Comment]()
override func viewDidLoad() {
super.viewDidLoad()
patDataTableView.delegate = self
patDataTableView.dataSource = self
patDataTableView.rowHeight = 1150
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "goToComments" {
let commtsVC = segue.destination as! CommentsVC
commtsVC.ptComments = ptComments
SVProgressHUD.dismiss()
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return ptdatas.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
if tableView == patDataTableView {
let cell = tableView.dequeueReusableCell(withIdentifier:
"PatdataCell", for: indexPath) as? PatdataCell
cell!.configurePatDataCell(ptdata: ptdatas[indexPath.row],
delegate: self)
return cell!
}
return UITableViewCell()
}
func patCommentBtnTapped (ptcomments: [Comment]) {
self.ptComments = ptcomments
performSegue(withIdentifier: "goToComments", sender: self)
}
}
CommentsVC
import UIKit
import Firebase
import FirebaseFirestore
class CommentsVC: UIViewController, UITableViewDelegate,
UITableViewDataSource, CommentsDelegate {
#IBOutlet weak var commentTableView: UITableView!
#IBOutlet weak var addCommentTxt: UITextField!
#IBOutlet weak var keyboardView: UIView!
var ptComments = [Comment]()
var commentsPtData: Comment!
var commentRef: DocumentReference!
var username: String!
var commentListener : ListenerRegistration!
let firestore = Firestore.firestore()
override func viewDidLoad() {
super.viewDidLoad()
commentTableView.dataSource = self
commentTableView.delegate = self
commentTableView.rowHeight = 110
//commentRef =
firestore.collection(PTLIST_REF).document(commentsPtData.documentId)
// if let name = Auth.auth().currentUser?.displayName{
// username = name
// }
self.view.bindToKeyboard()
}
override func viewDidAppear(_ animated: Bool) {
commentListener =
firestore.collection(PTLIST_REF).document(self.commentsPtData
.documentId)
.collection(COMMENTS_REF)
.order(by: TIMESTAMP, descending: false)
.addSnapshotListener({ (snapshot, error) in
guard let snapshot = snapshot else {
debugPrint("Error Fetching comments: \(Error.self)")
return
}
self.ptComments.removeAll()
self.ptComments = Comment.parseData(snapshot: snapshot)
self.commentTableView.reloadData()
})
}
override func viewDidDisappear(_ animated: Bool) {
commentListener.remove()
}
func commentOptionsTapped(commentsCellPtData: Comment) {
let alert = UIAlertController(title: "Edit Comment", message: "You
can delete or edit", preferredStyle: .actionSheet)
let deleteAction = UIAlertAction(title: "Delete Comment", style:
.default) { (action) in
self.firestore.runTransaction({ (transaction, errorPointer) ->
Any? in
let ptListDocument: DocumentSnapshot
do {
try ptListDocument =
transaction.getDocument(Firestore.firestore()
.collection(PTLIST_REF).document(self.commentsPtData.documentId))
} catch let error as NSError {
debugPrint("Fetch Error: \ .
(error.localizedDescription)")
return nil
}
guard let oldNumComments = ptListDocument.data()!
[NUM_COMMENTS] as? Int else { return nil }
transaction.updateData([NUM_COMMENTS : oldNumComments -
1], forDocument: self.commentRef!)
let commentRef =
self.firestore.collection(PTLIST_REF).document(self
.commentsPtData.documentId).collection(COMMENTS_REF)
.document(commentsCellPtData.documentId!)
transaction.deleteDocument(commentRef)
return nil
}) { (object, error) in
if let error = error {
debugPrint("transaction failed: \(error)")
} else {
alert.dismiss(animated: true, completion: nil)
}
}
}
let editAction = UIAlertAction(title: "Edit Comment", style:
.default) { (action) in
self.performSegue(withIdentifier: "toEditComment", sender:
(commentsCellPtData, self.commentsPtData))
alert.dismiss(animated: true, completion: nil)
}
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel,
handler: nil)
alert.addAction(deleteAction)
alert.addAction(editAction)
alert.addAction(cancelAction)
present(alert, animated: true, completion: nil)
}
#IBAction func addCommentTapped(_ sender: Any) {
guard let commentTxt = addCommentTxt.text else { return }
firestore.runTransaction({ (transaction, errorPointer) -> Any? in
let ptListDocument: DocumentSnapshot
do {
try ptListDocument =
transaction.getDocument(Firestore.firestore()
.collection(PTLIST_REF).document(self.commentsPtData.documentId))
} catch let error as NSError {
debugPrint("Fetch Error: \(error.localizedDescription)")
return nil
}
guard let oldNumComments = ptListDocument.data()!
[NUM_COMMENTS] as? Int else { return nil }
transaction.updateData([NUM_COMMENTS : oldNumComments + 1],
forDocument: self.commentRef!)
let newCommentRef =
self.firestore.collection(PTLIST_REF).document((self
.commentsPtData.documentId)).collection(COMMENTS_REF).document()
transaction.setData([
COMMENT_TXT : commentTxt,
TIMESTAMP : FieldValue.serverTimestamp(),
USERNAME : self.username!,
USER_ID : Auth.auth().currentUser?.uid ?? ""
], forDocument: newCommentRef)
return nil
}) { (object, error) in
if let error = error {
debugPrint("transaction failed: \(error)")
} else {
self.addCommentTxt.text = ""
self.addCommentTxt.resignFirstResponder()
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection
section: Int) -> Int {
return ptComments.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath:
IndexPath) -> UITableViewCell {
if let cell = tableView.dequeueReusableCell(withIdentifier:
"CommentCell", for: indexPath) as? CommentCell {
cell.configureCell(comment: ptComments[indexPath.row],
delegate: self)
return cell
}
return UITableViewCell()
}
}

Answer 1

In your source code ptcomments property in Custom Cell not set anywhere, it is empty in cell.
Please set correct value for ptcomments
UPDATE:
You try add line like self.comments = ptdata.commentsList to function configurePatDataCell