How to add a searchbar to tableview in swift? - swift

Question

I am trying to add in a search bar function to actually filter my data. I have been able to generate the data that I need and populate it into a tableview. However, when I go to search using the following code, the searching variable always comes back as false so the tableview never gets updated.

Answer 1

class MainTableViewController: UITableViewController {
let searchBarController = UISearchController(searchResultsController: nil)
let listData = ["Sam", "Jam", "Tam", "Pam", "Kam", "Nam", "Mam"]
var filteredData = [String]()
override func viewDidLoad() {
super.viewDidLoad()
title = "Demo"
setSearchBarUI()
getFilteredData()
}
func setSearchBarUI() {
searchBarController.searchBar.delegate = self
searchBarController.obscuresBackgroundDuringPresentation = false
searchBarController.searchBar.sizeToFit()
navigationItem.searchController = searchBarController
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredData.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "SearchStuff", for: indexPath) as! SearchStuff
cell.titleLabel.text = filteredData[indexPath.row]
return cell
}
func getFilteredData(searchedText: String = String()) {
let filteredListData: [String] = listData.filter({ (object) -> Bool in
searchedText.isEmpty ? true : object.lowercased().contains(searchedText.lowercased())
})
filteredData = filteredListData
tableView.reloadData()
}
}
extension MainTableViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
getFilteredData(searchedText: searchBar.text ?? String())
}
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
searchBar.endEditing(true)
}
func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
searchBar.endEditing(true)
searchBar.text = String()
getFilteredData()
}
}
Output:
This way you can ignore using the searching variable for handling different states of the table view.

Answer 2

If you are using UINavigationController , you can easily implement UISearchController
let searchController = UISearchController(searchResultsController: nil)
private func setSearchController() {
searchController.searchBar.placeholder = "Search".localized
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.delegate = self
navigationItem.searchController = searchController
definesPresentationContext = true
}
override func viewDidLoad() {
super.viewDidLoad()
setSearchController()
}