Vfrdtyky

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 + "u{f8ff}"

            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