I want to get firestore data in dequeueReusableCell - swift

Question

I rewrote all the text and now I got the code I wanted to realize.
It can not be displayed on the tableCell, and the layout also collapses. I am sorry that the code and the body I wrote are not explained enough.
guard let userID = Auth.auth (). currentUser? .uid I want to always acquire userID with else {return}.
// guard let docSnapshot = querySnapshot, document.exists else {return}
Since an error occurs, it is commented out.
Within viewidLoad of UIViewController
var profDict: [ProfDic] = [] is in the UIViewController.
profUIView is being added to UIViewController.
func getFirebaseData() {
db = Firestore.firestore()
guard let userID = Auth.auth().currentUser?.uid else {return}
let ref = db.collection("users").document(userID)
ref.getDocument{ (document, error) in
if let document = document {
// guard let docSnapshot = querySnapshot, document.exists else {return}
if let prof = ProfDic(dictionary: document.data()!) {
self.profDict.append(prof)
print("Document data \(document.data())")
}
}else{
print("Document does not exist")
}
self.profUIView.tableView1.reloadData()
}
}
tableView1 has been added to ProfUIView.
class ProfUIView: UIView, UITableViewDelegate, UITableViewDataSource {
//omission...
override init(frame: CGRect) {
super.init(frame: frame)
backgroundColor = .blue
addSubview(tableView1)
tableView1.anchor(top: //omission...
sections = [
Section(type: .prof_Sec, items: [.prof]),
Section(type: .link_Sec, items: [.link]),
Section(type: .hoge_Sec, items: [.hoge0])
]
tableView1.register(TableCell0.self, forCellReuseIdentifier: TableCellId0)
tableView1.register(TableCell3.self, forCellReuseIdentifier: TableCellId3)
tableView1.register(TableCell5.self, forCellReuseIdentifier: TableCellId5)
tableView1.delegate = self
tableView1.dataSource = self
}
var tableView1:UITableView = {
let table = UITableView()
table.backgroundColor = .gray
return table
}()
//omission
func numberOfSections(in tableView: UITableView) -> Int {
return sections.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return (baseVC?.profDict.count)!//sections[section].items.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch sections[indexPath.section].items[indexPath.row] {
case .prof:
let cell0 = tableView.dequeueReusableCell(withIdentifier: TableCellId0, for: indexPath) as? TableCell0
cell0?.nameLabel.text = baseVC?.profDict[indexPath.row].userName
return cell0!
}
//omission...
}
}
Additional notes
import Foundation
import FirebaseFirestore
struct ProfDic {
var userName :String
var dictionary:[String:Any] {
return
["userName" : userName
]
}
}
extension ProfDic {
init?(dictionary:[String:Any]) {
guard let userName = dictionary["userName"] as? String
else {return nil}
self.init(userName: userName as String)
}
}
enter image description here

Answer 1

First create an empty array of ProfDic elements:
var profDict: [ProfDic] = []
Then create a function to load your Firebase Data:
func getFirebaseData() {
db = Firestore.firestore()
let userRef = db.collection("users").getDocuments() {
[weak self] (querySnapshot, error) in
for document in querySnapshot!.documents {
guard let docSnapshot = docSnapshot, docSnapshot.exists else {return}
if let prof = ProfDic(dictionary: docSnapshot.data()!) {
profDict.append(prof)
}
}
tableView.reloadData()
}
}
Call this function in viewDidLoad or viewDidAppear.
Then in tableView cellForRowAt you access your data like this:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
switch sections[indexPath.section].items[indexPath.row] {
case .prof:
let cell = tableView.dequeueReusableCell(withIdentifier: TableCellId, for: indexPath) as? TableCell
cell?.nameLabel.text = profDict[indexPath.row].userName
return cell!
}
}
EDIT:
Also in numberOfRowsInSection:
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return profDict.count
}