tableview error while searching - ios

Question

Hi I have two arrays and only one array is updating with search bar.. I keep the TitleArray to show in tableView title and detailsArray to show in tableView subtitle.. once I start searching only title following my typing but subtitle nothing change.
#IBOutlet weak var AirportsTableView: UITableView!
var TitleArray = [String]()
var DetailsArray = [String]()
var NumberOfRows = 0
var filteredNamesArray = [String]()
var filteredDetailsArray = [String]()
var resultSearchController = UISearchController!()
**override func viewDidLoad() {
super.viewDidLoad()**
// Do any additional setup after loading the view.
self.resultSearchController = UISearchController(searchResultsController: nil)
self.resultSearchController.searchResultsUpdater = self
self.resultSearchController.dimsBackgroundDuringPresentation = false
self.resultSearchController.searchBar.sizeToFit()
self.resultSearchController.loadViewIfNeeded()
self.AirportsTableView.tableHeaderView = self.resultSearchController.searchBar
self.AirportsTableView.reloadData()
parseJSON()
}
func parseJSON() {
if let path = NSBundle.mainBundle().pathForResource("airports", ofType: "json") {
do {
let data = try NSData(contentsOfURL: NSURL(fileURLWithPath: path), options: NSDataReadingOptions.DataReadingMappedIfSafe)
let jsonObj = JSON(data: data)
if jsonObj != JSON.null {
// print("jsonData:\(jsonObj)")
NumberOfRows = jsonObj.count
for i in 0...NumberOfRows {
let City = jsonObj[i]["city"].string as String!
let Country = jsonObj[i]["country"].string as String!
let Iata = jsonObj[i]["iata"].string as String!
let Name = jsonObj[i]["name"].string as String!
self.TitleArray.append("\(City) - \(Country) - \(Iata)")
self.DetailsArray.append("\(Name)")
}
} else {
print("could not get json from file, make sure that file contains valid json.")
}
} catch let error as NSError {
print(error.localizedDescription)
}
} else {
print("Invalid filename/path.")
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
}
*/
// MARK: - Table view data source
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
// #warning Incomplete implementation, return the number of sections
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
if self.resultSearchController.active
{
return self.filteredNamesArray.count
} else
{
return self.TitleArray.count
}
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell?
if self.resultSearchController.active
{
cell!.textLabel?.text = self.filteredNamesArray[indexPath.row]
} else
{
cell!.textLabel?.text = self.TitleArray[indexPath.row]
cell!.detailTextLabel?.text = self.DetailsArray[indexPath.row]
}
return cell!
}
func updateSearchResultsForSearchController(searchController: UISearchController) {
self.filteredNamesArray.removeAll(keepCapacity: false)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchController.searchBar.text!)
let array = (self.TitleArray as NSArray).filteredArrayUsingPredicate(searchPredicate)
self.filteredNamesArray = array as! [String]
self.AirportsTableView.reloadData()
}
// MARK: - Segues
/*
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "AirportDetails" {
if let indexPath = self.AirportsTableView.indexPathForSelectedRow {
let airportDetail : Airports = TitleArray[indexPath.row]
let controller = (segue.destinationViewController as! UINavigationController).topViewController as! AllWaysFlightsViewController
controller.airportDetail = airportDetail
controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem()
controller.navigationItem.leftItemsSupplementBackButton = true
}
}
}
*/

Answer 1

Instead of using two separate arrays use only one array and populate it with object containing both variables you are using to populate the tableView.
class Address {
var city: String
var detail: String
init(city: String, detail:String) {
self.city = city
self.detail = detail
}
}
Parse your json like this:
for i in 0...NumberOfRows {
let City = jsonObj[i]["city"].string as String!
let Country = jsonObj[i]["country"].string as String!
let Iata = jsonObj[i]["iata"].string as String!
let Name = jsonObj[i]["name"].string as String!
let city = "\(City) - \(Country) - \(Iata)"
let address = Address(city: city, detail: Name)
self.TitleArray.append(address)
self.filteredNamesArray.append(address)
}
Filter your title array containing addresses. Your titlearray and filtered array both contains same data for the first time you can refer to the json parsing for this. Here you can use one for filtering and when search bar is empty it user cancel his search you can re-populate your array from the other one.
func updateSearchResultsForSearchController(searchController: UISearchController) {
self.filteredNamesArray.removeAll(keepCapacity: false)
let searchPredicate = NSPredicate(format: "SELF.city CONTAINS[c] %#", searchController.searchBar.text!)
let array = (self.TitleArray as NSArray).filteredArrayUsingPredicate(searchPredicate)
self.filteredNamesArray = array as! [Address]
self.AirportsTableView.reloadData()
}
your tableView logic will be changed accordingly
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of rows
return self.filteredNamesArray.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as UITableViewCell?
let address = self.filteredNamesArray[indexPath.row]
cell!.textLabel?.text = address?.city
cell!.detailTextLabel?.text = address?.detail
return cell!
}

Answer 2

You need to change the way you approach filtering the data so that rather than just apply a predicate you explicitly iterate and check the predicate, if you find a match then you take that item and the corresponding description into your filtered arrays.
Something like:
func updateSearchResultsForSearchController(searchController: UISearchController) {
self.filteredNamesArray.removeAll(keepCapacity: false)
self.filteredDetailsArray.removeAll(keepCapacity: false)
let searchString = searchController.searchBar.text!
var index = 0
for title in self.TitleArray
if title.rangeOfString(searchString).location != NSNotFound {
self.filteredNamesArray.append(title)
self.filteredDetailsArray.append(self.DetailsArray[index])
}
index += 1
}
self.AirportsTableView.reloadData()
}