L'ajout d'une barre de recherche par programme pour tableview dans swift

Voici le code snipet dans swift pour la même référence qu'Apple Doc mentionné dans le commentaire.

UISearchDisplayController est obsolète dans IOS8.0, et recommandé d'utiliser UISearchController

Espérons que cela vous aidera beaucoup

ContactTVC

class ContactTVC:UITableViewController{   
//MARK: Types
///State restoration values.
enum RestorationKeys : String {
case viewControllerTitle
case searchControllerIsActive
case searchBarText
case searchBarIsFirstResponder
}
struct SearchControllerRestorableState {
var wasActive = false
var wasFirstResponder = false
}
/*
The following 2 properties are set in viewDidLoad(),
They an implicitly unwrapped optional because they are used in many other places throughout this view controller
*/
///Search controller to help us with filtering.
var searchController: UISearchController!
///Secondary search results table view.
var resultsTableController: ResultsTableController!
///Restoration state for UISearchController
var restoredState = SearchControllerRestorableState()
var arrayContacts: Array<CNContact> = []
var searchResultArrayContacts: Array<CNContact> = []
override func viewDidLoad() {
super.viewDidLoad()
resultsTableController = ResultsTableController()
//We want to be the delegate for our filtered table so didSelectRowAtIndexPath(_:) is called for both tables.
    resultsTableController.tableView.delegate = self
searchController = UISearchController(searchResultsController: resultsTableController)
searchController.searchResultsUpdater = self
searchController.searchBar.sizeToFit()
tableView.tableHeaderView = searchController.searchBar
searchController.delegate = self
searchController.dimsBackgroundDuringPresentation = false //default is YES
    searchController.searchBar.delegate = self    //so we can monitor text changes + others

/*
Search is now just presenting a view controller. As such, normal view controller
presentation semantics apply. Namely that presentation will walk up the view controller
hierarchy until it finds the root view controller or one that defines a presentation context.
*/
definesPresentationContext = true
}
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
//Restore the searchController's active state.
    if restoredState.wasActive {
searchController.active = restoredState.wasActive
restoredState.wasActive = false
if restoredState.wasFirstResponder {
searchController.searchBar.becomeFirstResponder()
restoredState.wasFirstResponder = false
}
}
}
//MARK override TableViewDelegates/Datasource methods  
}
extension ContactTVC: UISearchResultsUpdating{
//MARK: UISearchResultsUpdating

func updateSearchResultsForSearchController(searchController: UISearchController) {
if let text = searchController.searchBar.text where (text.isEmpty == false){
{
//Hand over the filtered results to our search results table.

let resultsController = searchController.searchResultsController as! ResultsTableController
resultsController.filteredProducts = Array(searchResult)
resultsController.tableView.reloadData()
dispatch_async(dispatch_get_main_queue(), {
self.tableViewContacts.reloadData()
})
}   
}
}
}
//MARK: SearchBarDelegate
extension ContactTVC: UISearchBarDelegate{
func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
if let text = searchBar.text where (text.isEmpty == false) {
//update the search result array by filtering….

if searchResult.count > 0{
self.searchResultArrayContacts = Array(searchResult)
}
else{
self.searchResultArrayContacts = Array(self.arrayContacts)
}
dispatch_async(dispatch_get_main_queue(), {
self.tableViewContacts.reloadData()
})
}
}
func searchBarCancelButtonClicked(searchBar: UISearchBar) {
searchBar.text = nil
searchBar.resignFirstResponder()
}
}

///La table view controller responsable de l'affichage filtré produits que l'utilisateur tape dans le champ de recherche.

class ResultsTableController: UITableViewController {
//MARK: Properties

let reusableIdentifier = "contactCell"
var filteredProducts = [CNContact]()
override func viewDidLoad() {
self.tableView.emptyDataSetSource = self
self.tableView.emptyDataSetDelegate = self
}
//MARK: UITableViewDataSource
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return filteredProducts.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell =  UITableViewCell(style: .Subtitle, reuseIdentifier: reusableIdentifier)
var contact = CNContact()
contact = filteredProducts[indexPath.row]
//Configure the cell...
    cell.textLabel?.text = contact.givenName
let phones = contact.phoneNumbers[0].value as! CNPhoneNumber
cell.detailTextLabel?.text = phones.stringValue
return cell
}
}

Grâce

OriginalL'auteur Chandan

Dans swift 4.1 et Xcode 9.4.1

Etape 1

Ajouter UISearchBarDelegate à votre vue-contrôleur.

Etape 2

//Write this code in viewDidLoad() or your required function
let searchBar:UISearchBar = UISearchBar()
//IF you want frame replace first line and comment "searchBar.sizeToFit()"
//let searchBar:UISearchBar = UISearchBar(frame: CGRect(x: 10, y: 10, width: headerView.frame.width-20, height: headerView.frame.height-20))
searchBar.searchBarStyle = UISearchBarStyle.prominent
searchBar.placeholder = " Search..."
searchBar.sizeToFit()
searchBar.isTranslucent = false
searchBar.backgroundImage = UIImage()
searchBar.delegate = self
yourViewName.addSubview(searchBar)//Here change your view name

Etape 3

func searchBar(_ searchBar: UISearchBar, textDidChange textSearched: String) {
//your code here....
}

OriginalL'auteur iOS