How to display search results, and no result text if no result? - swift

Question

I am trying to display only results instead of all data from the parse server. I tried different methods (mostly same), but I failed. I know that I miss something.
My question is how to display only results as well as no result text on the screen if no result.
You can find my approach below.
Thank you very much in advance.
class SearchTableViewController: UITableViewController, UISearchBarDelegate, UISearchResultsUpdating {
#IBOutlet weak var searchBar: UISearchBar!
var searchActive : Bool = false
var data:[PFObject]!
var noteObjects: NSMutableArray! = NSMutableArray()
var filtered:[PFObject]!
var refresher: UIRefreshControl = UIRefreshControl()
var searchController = UISearchController()
override func viewDidLoad() {
super.viewDidLoad()
search()
searchBar.delegate = self
self.refresher.addTarget(self, action: #selector(refresh), for: .valueChanged)
self.tableView?.addSubview(refresher)
self.searchDisplayController?.searchResultsTableView.rowHeight = tableView.rowHeight;
}
#objc func refresh() {
print("Refreshed")
self.refresher.endRefreshing()
search()
}
#objc func search(searchText: String? = nil){
let query = PFQuery(className: "NewUsers")
query.whereKey("user", equalTo: PFUser.current() as Any)
if(searchText != nil){
query.whereKey("name", contains: searchText)
}
query.findObjectsInBackground { (objects, error) in
if error == nil {
if let cars = objects {
for object in cars {
if (object as PFObject?) != nil {
self.data = objects
self.tableView.reloadData()
}
}
}
}
}
}
func updateSearchResults(for searchController: UISearchController) {
self.filtered.removeAll(keepingCapacity: false)
let searchText = searchController.searchBar.text
let query: PFQuery = PFQuery(className: "NewUsers")
if searchController.isActive == true {
query.whereKey("name", matchesRegex: searchText!, modifiers: "i")
self.tableView.reloadData()
}
query.findObjectsInBackground { (results, error) in
self.filtered = results
self.tableView.reloadData()
}
print(searchText as Any)
}
var shouldUseSearchResult : Bool {
if let searchText = searchController.searchBar.text {
if searchText.isEmpty {
return false
}
}
return searchController.isActive
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if data != nil {
return self.data.count
}
return 0
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = self.tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! SearchTableViewCell
let obj = self.data[indexPath.row]
self.name = (obj["name"] as? String)!
self.surname = (obj["surname"] as? String)!
self.birthdate = (obj["birthday"] as? String)!
self.age = (obj["age"] as? String)!
self.city = (obj["city"] as? String)!
cell.dateLabel.text = ": " + birthday
cell.ageLabel.text = ": \(age)"
cell.userLabel.text = ": " + name + " " + surname
return cell
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
searchActive = true;
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
searchActive = false;
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchActive = false;
self.searchBar.endEditing(true)
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
searchActive = false;
self.searchBar.endEditing(true)
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
search(searchText: searchText)
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
self.searchBar.resignFirstResponder()
}
}

Answer 1

func numberOfSections(in tableView: UITableView) -> Int {
if (self.data.count == 0)
{
let noDataLabel: UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: self.tableView.bounds.size.width, height: tableView.bounds.size.height))
noDataLabel.text = "No Result Found."
noDataLabel.textColor = UIColor.red
noDataLabel.textAlignment = .center
self.tableView.backgroundView = noDataLabel
self.tableView.backgroundColor = UIColor.white
self.tablevİEW.separatorStyle = .none
}
return 1
}
self.arrayDealPage is array & self.dealsTable is tableView Hope, it might help u and delegate and datasource protocol added.