No found anything when use searchbar in swift 3 - swift

Question

I have a little problem. I can search in a array via searchbar. But when I search a city not in my array, doesn't change anything. I want to show error message this case. For example 'Not found any city'
My code is below:
var cities = [String]()
var citiesFiltered = [String]()
var searchBarActive:Bool = false
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
cities = ["Abu Dabi","Amman","Berlin","Catarman","Dortmund"]
}
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
if(searchBarActive){
return citiesFiltered.count
}
return cities.count
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath)
if(searchBarActive){
cell.textLabel?.text = citiesFiltered[indexPath.row]
}else{
cell.textLabel?.text = cities[indexPath.row]
}
return cell
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
searchBarActive = true
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
searchBarActive = false
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBarActive = false
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
searchBarActive = false
}
func searchBarBookmarkButtonClicked(_ searchBar: UISearchBar) {
searchBarActive = false
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
citiesFiltered = cities.filter({ (text) -> Bool in
let txt : NSString = text as NSString
let range = txt.range(of: searchText, options: NSString.CompareOptions.caseInsensitive)
return range.location != NSNotFound
})
if(citiesFiltered.count == 0){
searchBarActive = false
}else{
searchBarActive = true
}
self.tableView.reloadData()
}

Answer 1

//Try with this changes.
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
if(searchBarActive && citiesFiltered.count == 0){
return 1
}
else if searchBarActive {
return citiesFiltered.count
}
return cities.count
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = tableView.dequeueReusableCell(withIdentifier: "myCell", for: indexPath)
if(searchBarActive && citiesFiltered.count == 0){
cell.textLabel?.text = "Not found any city"
}
else if searchBarActive {
cell.textLabel?.text = citiesFiltered[indexPath.row]
}
else{
cell.textLabel?.text = cities[indexPath.row]
}
return cell
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
citiesFiltered = cities.filter({ (text) -> Bool in
let txt : NSString = text as NSString
let range = txt.range(of: searchText, options: NSString.CompareOptions.caseInsensitive)
return range.location != NSNotFound
})
self.tableView.reloadData()
}

Answer 2

The problem is here
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
citiesFiltered = cities.filter({ (text) -> Bool in
let txt : NSString = text as NSString
let range = txt.range(of: searchText, options: NSString.CompareOptions.caseInsensitive)
return range.location != NSNotFound
})
if(citiesFiltered.count == 0){
searchBarActive = false
}else{
searchBarActive = true
}
self.tableView.reloadData()
}
You are setting the bar as inactive, hence displaying the unfiltered list, when the filtered array is empty.
By removing
if(citiesFiltered.count == 0){
searchBarActive = false
}else{
searchBarActive = true
}
You'll get an empty table when searching for something that is not on the list.