searchBar in tableView enquiries (Swift) - ios

Question

I don't really know how to explain thats why I'm putting this title. But i do hope you can understand. As of right now, my searchBar is able to return results BUT i have to enter the entire name (For example: I have to type "EcoBooth" in order for the searchBar to return EcoBooth results.).
How can i make it as though if i just enter "Eco", it will return EcoBooth based on just a few strings i type?
P.S: Do look at the 2 images attached for more info.
My TableView Controller codes
import UIKit
import FirebaseDatabase
var ref: DatabaseReference?
var databaseHandle: DatabaseHandle?
var postData = [String]()
var postData2 = [String]()
var currentpostDataArray = [String]()
var tableDataArray = [tableData]()
var searchArray = [tableData]()
var inSearchMode = false
class TableViewController: UITableViewController, UISearchBarDelegate {
#IBOutlet var searchBar: UISearchBar!
override func viewDidLoad() {
super.viewDidLoad()
setUpSearchBar()
ref = Database.database().reference() //set the firebase reference
// Retrieve the post and listen for changes
databaseHandle = ref?.child("Posts2").observe(.value, with: { (snapshot) in
// Code to execute when a child is added under "Posts"
postData.removeAll()
postData2.removeAll()
tableDataArray.removeAll()
for child in snapshot.children {
let snap = child as! DataSnapshot
let key = snap.key
let value = String(describing: snap.value!)
let rating = (value as NSString).integerValue
postData.append(key)
postData2.append(value)
tableDataArray.append(tableData(boothName: key, boothRating: rating))
currentpostDataArray = postData
}
self.tableView.reloadData()
})
}
private func setUpSearchBar() {
searchBar.delegate = self
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return currentpostDataArray.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
cell.textLabel?.text = currentpostDataArray[indexPath.row]
cell.detailTextLabel?.text = postData2[indexPath.row] + " ♥"
cell.detailTextLabel?.textColor = UIColor.red;
return cell
}
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchArray.removeAll()
searchArray = tableDataArray
currentpostDataArray.removeAll()
postData2.removeAll()
if !searchText.isEmpty {
for data in searchArray {
let item = data.boothName
if (searchText.lowercased().range(of: item) != nil) || data.boothName.lowercased() == searchText.lowercased() || searchText.lowercased().contains(data.boothName.lowercased())
{
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
}
}
if searchText.isEmpty {
loadDara()
}
self.tableView.reloadData()
}
func searchBar(_ searchBar: UISearchBar, selectedScopeButtonIndexDidChange selectedScope: Int) {
switch selectedScope {
case 0:
currentpostDataArray.removeAll()
postData2.removeAll()
for data in tableDataArray {
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
self.tableView.reloadData()
case 1:
currentpostDataArray.removeAll()
postData2.removeAll()
let sortedTableData = tableDataArray.sorted(by: { $0.boothRating > $1.boothRating })
for data in sortedTableData {
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
self.tableView.reloadData()
default:
break
}
tableView.reloadData()
}
func loadDara() {
for data in tableDataArray {
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
}
}
class tableData {
var boothName: String
var boothRating: Int
init(boothName: String, boothRating: Int) {
self.boothName = boothName
self.boothRating = boothRating
}
}

Answer 1

Replace
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchArray.removeAll()
searchArray = tableDataArray
currentpostDataArray.removeAll()
postData2.removeAll()
if !searchText.isEmpty {
for data in searchArray {
let item = data.boothName
if (searchText.lowercased().range(of: item) != nil) || data.boothName.lowercased() == searchText.lowercased() || searchText.lowercased().contains(data.boothName.lowercased())
{
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
}
}
if searchText.isEmpty {
loadDara()
}
self.tableView.reloadData()
}
With
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchArray.removeAll()
searchArray = tableDataArray
currentpostDataArray.removeAll()
postData2.removeAll()
if !searchText.isEmpty {
for data in searchArray {
let item = data.boothName
if (item.lowercased().range(of: searchText.lowercased()) != nil)
{
currentpostDataArray.append(data.boothName)
let value = String(describing: data.boothRating)
postData2.append(value)
}
}
}
if searchText.isEmpty {
loadDara()
}
self.tableView.reloadData()
}

Answer 2

Use NSPredicate to search from array like this:
let searchPredicate = NSPredicate(format: "boothName CONTAINS[C] %#", searchText)
resultArr = (filteredArray as NSArray).filtered(using: searchPredicate)
You can prefer this link for more info about NSPredicate and also a swift code example : http://nshipster.com/nspredicate/