how to search data from model in swift? - swift

Question

I want to search for some data in the table view using the search bar, but when I try to find data in my model, I'm not able to search that data.I made a expand table view cell and created a search bar for searching data, but still I can't search the data in the model. How can I achieve that?
here is my code:
import UIKit
class FAQViewController: UIViewController, UITableViewDataSource {
var dataFaq = [modelFAQ]()
let items = [
modelFAQ(name: "1. search box", description: "The design led users to instinctively search for their question first before clicking the FAQs"),
modelFAQ(name: "2.list of FAQs ", description: "Customers clicked around on the FAQs first."),
modelFAQ(name: "3. customers", description: "top issues first and then use the search for the questions instead of browsing and yielding more relevant results")
]
#IBOutlet fileprivate weak var tableView: UITableView!
#IBOutlet weak var searchDataBar: UISearchBar!
fileprivate var indexPaths: Set<IndexPath> = []
var cellIdentifier = "dataSourceFAQ"
var searchData = [String]()
var searching = false
override var preferredStatusBarStyle: UIStatusBarStyle{
return .lightContent
}
override func viewDidLoad() {
super.viewDidLoad()
setupTableView()
searchDataBar.delegate = self
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if searching {
return searchData.count
}else {
return items.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as! FAQTableViewCell
if searching{
cell.titleLabel.text = searchData[indexPath.row]
}else{
cell.titleLabel.text = items[indexPath.row].name
}
let nameDetail = self[indexPath].name as? String
let description = self[indexPath].description
cell.update(name: nameDetail ?? "0", description: description)
cell.state = cellIsExpanded(at: indexPath) ? .expanded : .collapsed
return cell
}
override func viewWillAppear(_ animated: Bool) {
tabBarController?.tabBar.isHidden = true
}
private func setupTableView(){
tableView.delegate = self
tableView.dataSource = self
tableView.rowHeight = UITableView.automaticDimension
tableView.estimatedRowHeight = 200.0
tableView.separatorStyle = .none
}
}
extension FAQViewController: UITableViewDelegate{
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as!FAQTableViewCell
cell.state = .expanded
self.addExpandedIndexPath(indexPath)
tableView.beginUpdates()
tableView.endUpdates()
print("1")
}
func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
let cell = tableView.cellForRow(at: indexPath) as! FAQTableViewCell
cell.state = .collapsed
self.removeExpandedIndexPath(indexPath)
tableView.beginUpdates()
tableView.endUpdates()
print("2")
}
}
extension FAQViewController {
func cellIsExpanded(at indexPath: IndexPath) -> Bool {
return indexPaths.contains(indexPath)
}
func addExpandedIndexPath(_ indexPath: IndexPath) {
indexPaths.insert(indexPath)
}
func removeExpandedIndexPath(_ indexPath: IndexPath) {
indexPaths.remove(indexPath)
}
}
extension FAQViewController {
subscript(indexPath: IndexPath) -> modelFAQ {
return items[indexPath.row]
}
}
extension FAQViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
searchData = searchText.isEmpty ? items: items.filter{ $0.name(searchText)}
searching = true
tableView.reloadData()
}
}
here is my table view cell
import UIKit
class FAQTableViewCell: UITableViewCell {
enum cellState{
case collapsed
case expanded
var carretImage: UIImage {
switch self {
case .collapsed:
return UIImage(named: "ic_arrow_down")!
case .expanded:
return UIImage(named: "ic_arrow_up")!
}
}
}
#IBOutlet private weak var stackView: UIStackView!
#IBOutlet private weak var containerView: UIView!
#IBOutlet weak var titleLabel: UILabel!
#IBOutlet private weak var carret: UIImageView!
#IBOutlet private weak var descriptionLabel: UILabel!
private let expandedViewIndex: Int = 1
var state: cellState = .expanded {
didSet{
toggle()
}
}
override func awakeFromNib() {
selectionStyle = .none
containerView.layer.cornerRadius = 5.0
}
private func toggle(){
stackView.arrangedSubviews[expandedViewIndex].isHidden = stateIsCollapsed()
carret.image = state.carretImage
}
private func stateIsCollapsed() -> Bool{
return state == .collapsed
}
func update(name: String, description: String){
titleLabel.text = name
descriptionLabel.text = description
}
}
here is my model
struct modelFAQ {
var name: String
var description: String
}

Answer 1

Two issues:
You have to declare searchData as the same type as the main data.
By the way according to the naming convention struct and class names start with a capital letter
var searchData = [ModelFAQ]()
The search filter closure is wrong. Write
searchData = searchText.isEmpty ? items : items.filter{ $0.name.contains(searchText)}
or if you want to search case insensitive
searchData = searchText.isEmpty ? items : items.filter{ $0.name.range(of: searchText, options: .caseInsensitive) != nil }
And you have to change in cellForRowAt
cell.titleLabel.text = searchData[indexPath.row].name

Answer 2

NOTE: Always start class/struct name with CAPITAL LETTER
Wrong: modelFAQ
correct: ModelFAQ
You have made one mistake, you have to declare your searchData Array like below
var searchData = [ModelFAQ]()
and while in datasource method you have to get name from the ModelFAQ object and assign it to your label.
Hope it will help you.