Searchbar filtering issue

Question

Im new to the swift, I am trying to filter name from an array using the search bar in console am getting what I entered in the search bar but filtering with predicate im not getting filtered name...please can anyone help in this issue

var caseListOfBooker:[CaseDetails]=[]

var searchString:String=""

var filteredString = [String]()

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
            print("searchText \(searchText)")

            searchString = searchText
            updateSearchResults()
            tableview.reloadData()
        }
        func updateSearchResults(){

        filteredString.removeAll(keepingCapacity: false)

        let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %@", searchString)

        let array = self.caseListOfBooker.filter{$0.person_of_interest.contains(searchString)}
            print(array)

                    if let list=array as? [String]{
                        filteredString=list
                    }


            print(filteredString)

            tableview.reloadData()



    }


extension SearchPOIVC : UITableViewDelegate, UITableViewDataSource {

 func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        if filteredString != []{

            return filteredString.count
        }
        else
        {
            if searchString != "[]" {
                return caseListOfBooker.count
            }else {
                return 0
            }
        }

    }

    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
        return 80.00
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell:POIProfileDetailsCell = tableview.dequeueReusableCell(withIdentifier: "POIProfileDetailsCell", for: indexPath) as! POIProfileDetailsCell
        if filteredString != []{

            cell.poiName.text = filteredString[indexPath.row]

            return cell
        }else{

            if searchString != "[]"{
                 cell.poiName.text = self.caseListOfBooker[indexPath.row].person_of_interest

            }
            return cell

        }

    }

Answer 1

var searchPredicate = NSPredicate()
searchPredicate = NSPredicate(format: "self CONTAINS[C] %@", your_searching_text)        
let Final_Search_array = (Your_Array).filtered(using: searchPredicate)

Answer 2

let array = self.caseListOfBooker.filter{$0.person_of_interest.contains(searchString)}

You are getting array of CaseDetails objects and trying to cast to array of String

It fails. You need to get string values from the CaseDetails object and join them

Use

filteredString = array.map { $0.person_of_interest }

Or

for caseDetail in array {
    filteredString.append(caseDetail.person_of_interest)
}

Instead of

if let list = array as? [String]{
    filteredString=list
}

Answer 3

The most efficient way to filter custom classes is to use the same type for the data source array and the filtered array

var caseListOfBooker = [CaseDetails]()
var filteredBooker = [CaseDetails]()

Add a property isFiltering which is set to true when the search text is not empty

var isFiltering = false

and delete searchString and filteredString

var searchString:String=""
var filteredString = [String]()

In updateSearchResults filter the data source array (with native Swift functions), set isFiltering accordingly and reload the table view

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
    print("searchText \(searchText)")
    updateSearchResults(searchText: searchText)
}

func updateSearchResults(searchText: String) {
    if searchText.isEmpty {
        filteredBooker.removeAll()
        isFiltering = false
    } else {
        filteredBooker = caseListOfBooker.filter{$0.person_of_interest.range(of: searchText, options: .caseInsensitive) != nil }
        isFiltering = true
    }
    tableview.reloadData()
}

In the table view data source methods display the data depending on isFiltering

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return isFiltering ? filteredBooker.count : caseListOfBooker.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableview.dequeueReusableCell(withIdentifier: "POIProfileDetailsCell", for: indexPath) as! POIProfileDetailsCell
    let booker = isFiltering ? filteredBooker[indexPath.row] : caseListOfBooker[indexPath.row]
    cell.poiName.text = booker.person_of_interest
}