Dfyjkt

i have had this issue for a long time. The only way my searchUsers function work is when i put it in ViewDidLoad, and then change the .count to be equal or less than 0 (because its 0 by default).

But as it is right now (how i think it should work), the search dosent work.

What i want it to do is :

1. Only start the firebase search for users when the user has typed at least two letters (so it only searches for the users when the user has started typing, and only showing and loading the relevant data).


2. Also update the tableview along with filtering the search.

This is my code:

import UIKit
import FirebaseDatabase
import Firebase
import SDWebImage
import ObjectMapper

class FollowUsersTableViewController: UIViewController 

 @IBOutlet var tableView: UITableView!

 private var viewIsHiddenObserver: NSKeyValueObservation?
 let searchController = UISearchController(searchResultsController: nil)
 var usersArray = [UserModel]()
 var filteredUsers = [UserModel]()
 var loggedInUser: User?
 //
 var databaseRef = Database.database().reference()
 //usikker på den koden over

 override func viewDidLoad() 

 super.viewDidLoad()

 //large title
 self.title = "Discover"
 if #available(iOS 11.0, *) 
 self.navigationController?.navigationBar.prefersLargeTitles = true
 else 
 // Fallback on earlier versions
 

 self.tableView?.delegate = self
 self.tableView?.dataSource = self
 searchController.searchResultsUpdater = self
 searchController.dimsBackgroundDuringPresentation = false
 self.searchController.delegate = self;

 definesPresentationContext = true
 tableView.tableHeaderView = searchController.searchBar

 //self.loadProfileData()

 //self.searchBar(searchController.searchBar, textDidChange: searchController.searchBar.text)
 

 func searchUsers(text: String) 
 if text.count >= 2 
 self.usersArray = //clear the array each time
 let endingText = text + "uf8ff"
 databaseRef.child("profile").queryOrdered(byChild: "username")
 .queryStarting(atValue: text)
 .queryEnding(atValue: endingText)
 .observeSingleEvent(of: .value, with: snapshot in

 for child in snapshot.children 
 let childSnap = child as! DataSnapshot
 print(childSnap)
 let userObj = Mapper<UserModel>().map(JSONObject: childSnap.value!)
 userObj?.uid = childSnap.key
 if childSnap.key != self.loggedInUser?.uid //ignore this user
 self.usersArray.append(userObj!)

 
 
 self.tableView.reloadData()
 )
 
 //may need an else statement here to clear the array when there is no text

 override func prepare(for segue: UIStoryboardSegue, sender: Any?) 
 let dest = segue.destination as! UserProfileViewController
 let obj = sender as! UserModel
 let dict = ["uid": obj.uid!, "username": obj.username!, "photoURL": obj.photoURL, "bio": obj.bio]
 dest.selectedUser = dict as [String : Any]
 


// MARK: - tableview methods
extension FollowUsersTableViewController: UITableViewDataSource, UITableViewDelegate 

 func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
 return searchController.searchBar.text!.count >= 2 ? filteredUsers.count : 0
 

 func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
 let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FollowTableViewCell

 let user = filteredUsers[indexPath.row]

 cell.title?.text = user.username
 if let url = URL(string: user.photoURL ?? "") 
 cell.userImage?.sd_setImage(with: url, placeholderImage: #imageLiteral(resourceName: "user_male"), options: .progressiveDownload, completed: nil)
 cell.userImage.sd_setIndicatorStyle(.gray)
 cell.userImage.sd_showActivityIndicatorView()
 

 return cell
 

 func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat 
 return 50
 

 func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
 self.performSegue(withIdentifier: "user", sender: self.filteredUsers[indexPath.row])
 


// MARK: - search methods
extension FollowUsersTableViewController:UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate 

 func searchBar(_ searchBar: UISearchBar,
 textDidChange searchText: String) 

 self.searchUsers(text: searchText)
 

 func updateSearchResults(for searchController: UISearchController) 
 searchController.searchResultsController?.view.isHidden = false
 filterContent(searchText: self.searchController.searchBar.text!)

 self.tableView.reloadData()
 

 func filterContent(searchText:String)
 if searchText.count >= 2
 self.filteredUsers = self.usersArray.filter user in
 return(user.username!.lowercased().contains(searchText.lowercased()))
 
 
 

You need to set

searchController.searchBar.delegate = self

You conform to UISearchResultsUpdating and implement updateSearchResults but it doesn't call func searchUsers(text: String)

and conform to UISearchControllerDelegate that has no relation to the search look to it's methods Here