You can search for users in a tableview and it shows the back button in the UInavigation controller(pictured) When I tap on a row it takes me to the profile page from the tableView - however when I click back from the tableview the back button and UI navigation controller at the top disappears and you can only go back by swiping. Im not sure why this is happening.
The Tableview has a navigation controller embedded into a page view controller which holds the UIView controller.
Code 1 shows the tableview code 2 shows the profile page. Many thanks any help is appreciated.
import UIKit
import FirebaseFirestore
import Firebase
class ListOfUsersFromUniversity: UIViewController, UISearchBarDelegate {
@IBOutlet weak var searchBar: UISearchBar!
@IBOutlet weak var tableView: UITableView!
var University:String = ""
var users = [String]()
var filteredUsers = [String]()
var searching = false
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
searchBar.delegate = self
tableView.reloadData()
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
searchBar.becomeFirstResponder()
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
filteredUsers = users.filter({$0.lowercased().prefix(searchText.count) == searchText.lowercased()})
searching = true
tableView.reloadData()
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.navigationBar.isHidden = false
let docRef = Firestore.firestore().collection("User-Universities").document(University)
docRef.getDocument{ (document, error) in
if let document = document {
let data = document.data()
let keydict = data!.keys
let stringArray = Array(keydict)
print(stringArray)
for user in stringArray {
service.getUsernameFromUID(user) { (username) in
self.users.append(username)
}
}
} else {
print("Document does not exist")
}
}
DispatchQueue.main.async {
self.tableView.reloadData()
}
searchBar.becomeFirstResponder()
}
override func viewWillDisappear(_ animated: Bool) {
users.removeAll()
}
}
extension ListOfUsersFromUniversity: UITableViewDelegate, UITableViewDataSource {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searching {
return filteredUsers.count
} else {
return users.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell")!
if searching {
cell.textLabel?.text = filteredUsers[indexPath.row]
} else {
cell.textLabel?.text = users[indexPath.row]
}
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath)!
let username = cell.textLabel!.text ?? ""
let storyboard = UIStoryboard(name: "Search", bundle: nil)
let newVC = storyboard.instantiateViewController(withIdentifier: "ProfilePage") as! ProfileViewController
newVC.username = username
// let navigationController = UINavigationController()
self.navigationController?.pushViewController(newVC, animated: true)
}
}import UIKit
import FirebaseFirestore
import Firebase
import Kingfisher
class ProfileViewController: UIViewController {
let docRef = Firestore.firestore().collection("users")
var username:String = ""
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.prefersLargeTitles = true
self.title = username
// Do any additional setup after loading the view.
}
override func viewWillAppear(_ animated: Bool) {
self.navigationController?.navigationBar.isHidden = false
}
}
extension ProfileViewController: UICollectionViewDataSource{
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 12
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "PostProfileCell", for: indexPath) as! PostCollectionCell
cell.backgroundColor = .red
return cell
}
func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
guard kind == UICollectionView.elementKindSectionHeader else {
fatalError("Unexpected element kind.")
}
let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "ProfileHeader", for: indexPath) as! UserProfileHeaderCell
docRef.whereField("username", isEqualTo: username)
.getDocuments() { (querySnapshot, err) in
if let err = err {
print("Error getting documents: \(err)")
} else {
for document in querySnapshot!.documents {
let data = document.data()
let Link = data["ProfilePicUrl"] as? String ?? ""
let username = data["username"] as? String ?? ""
let university = data["University"] as? String ?? ""
let course = data["Course"] as? String ?? ""
let friends = data["friends"] as? Int
let url = URL(string: Link)
DispatchQueue.main.async {
headerView.University.text = university
headerView.Course.text = course
headerView.Friends.text = String(describing: friends!)
headerView.profilePicture.layer.cornerRadius = headerView.profilePicture.frame.size.width/2
headerView.profilePicture.clipsToBounds = true
let placeholder = UIImage(systemName: "person.circle")
headerView.profilePicture.kf.setImage(with: url, placeholder: placeholder)
}
}
}
}
return headerView
}
override func viewWillDisappear(_ animated: Bool) {
self.navigationController?.navigationBar.isHidden = true
}
}
extension ProfileViewController: UICollectionViewDelegateFlowLayout{
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let columns: CGFloat = 3
let spacing: CGFloat = 1.5
let totalHorizontalSpacing = (columns - 1) * spacing
let itemWidth = (collectionView.bounds.width - totalHorizontalSpacing) / columns
let itemSize = CGSize(width: itemWidth, height: itemWidth)
return itemSize
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAt section: Int) -> CGFloat {
return 1.5
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
return 1.5
}
}you could use viewWillAppear to set it to visible.
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
navigationController?.setNavigationBarHidden(false, animated: true)
}