Searchfield and tableview - showing only users with uppercase usernames - swift

Question

I have a searchfield in my app, where users can search for other users. However i have three issues with it:
right now the search only works for users that have a uppercase username. So for instance when i search "Ma", the only user that is showing is "Makelele" because his username has a uppercase letter as the first letter. For instance "mattgilbert" isnt showing at all, even though i should be on the tableview.
when the user has appered in the tableview, the user is still in the tableview, even though i have canceled the search.
i have it so the search for users only begins when the user has typed atleast 2 words, however if a user types more than that into the searchfield the user will just dissapear in the tableview. And i have to search more letters in order for the user to appear again.
It would mean alot if someone could help me out on this, as i have used alot of time on this search stuff. I want it to be as cost effiecent as possible, and at the same time be scaleable (hence why i have this two letters atleast typed before the database runs its query)
This is my code:
class FollowUsersTableViewController: UIViewController {
#IBOutlet var tableView: UITableView!
var isSearching = false
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()
searchController.searchBar.delegate = self
//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 isSearching ? filteredUsers.count : usersArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FollowTableViewCell
let user = isSearching ? filteredUsers[indexPath.row] : usersArray[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: isSearching ? self.filteredUsers[indexPath.row] : self.usersArray[indexPath.row])
}
}
// MARK: - search methods
extension FollowUsersTableViewController:UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate {
func updateSearchResults(for searchController: UISearchController) {
searchController.searchResultsController?.view.isHidden = false
self.searchUsers(text: self.searchController.searchBar.text!)
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()))
}
}
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
isSearching = true
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
self.filteredUsers = self.usersArray.filter{ user in
return(user.username!.lowercased().contains(searchText.lowercased()))
}
if(filteredUsers.count == 0){
isSearching = false
} else {
isSearching = true
}
self.tableView.reloadData()
}
}
EDIT: Updated Code
class FollowUsersTableViewController: UIViewController {
#IBOutlet var tableView: UITableView!
var isSearching = false
private var viewIsHiddenObserver: NSKeyValueObservation?
let searchController = UISearchController(searchResultsController: nil)
var usersArray = [UserModel]()
var loggedInUser: User?
//
var databaseRef = Database.database().reference()
//usikker på den koden over
override func viewDidLoad() {
super.viewDidLoad()
searchController.searchBar.delegate = self
//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 usersArray.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! FollowTableViewCell
let user = usersArray[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.usersArray[indexPath.row])
}
}
// MARK: - search methods
extension FollowUsersTableViewController:UISearchResultsUpdating, UISearchControllerDelegate, UISearchBarDelegate {
func updateSearchResults(for searchController: UISearchController) {
searchController.searchResultsController?.view.isHidden = false
self.searchUsers(text: self.searchController.searchBar.text!)
//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()))
}
}
}
*/
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
isSearching = true
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
self.usersArray = []
self.tableView.reloadData()
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
isSearching = false
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
self.usersArray.filter{ user in
return(user.username!.lowercased().contains(searchText.lowercased()))
}
if(usersArray.count == 0){
isSearching = false
} else {
isSearching = true
}
self.tableView.reloadData()
}
}

Answer 1

Please try this It may helps you.
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
let filteredArray = usersArray.filter { ($0["username"] as! String).range(of: searchText!, options: [.diacriticInsensitive, .caseInsensitive]) != nil }
}
It may helps you.Thank you

Answer 2

The answer to question #1
1) right now the search only works for users that have a uppercase
username. So for instance when i search "Ma", the only user that is
showing is "Makelele" because his username has a uppercase letter as
the first letter. For instance "mattgilbert" isnt showing at all, even
though i should be on the tableview.
Firebase doesn't have any kind of uppercase or lowercase search. It just has a literal string query that's case sensitive
The typical solution is to store a 'display' version of your strings and then a 'search' version of your strings were the string is lowercased in code before storing it in Firbease. So for example, here's a users node
users
uid_0
display_name: "Kirk"
search_name: "kirk"
uid_1
display_name: "Spock"
search_name: "spock"
uid_1
display_name: "Montgomery Scott"
search_name: "montgomery scott"
2 when the user has appered in the tableview, the user is still in the
tableview, even though i have canceled the search.
If a search is canceled, the dataSource array should be cleared and your tableView reloaded.
myDataSourceArray = []
self.reloadTableview
3 i have it so the search for users only begins when the user has
typed atleast 2 words, however if a user types more than that into the
searchfield the user will just dissapear in the tableview. And i have
to search more letters in order for the user to appear again.
The code I posted in previous answers solves this and is a complete, tested solution. Please refer back to those answers - you can almost copy and paste the code into a project and it will work.