How to search when search button clicked in keyboard? - ios

Question

I have a searchbar in my tableview header. For that i am using uisearchcontroler. But it update tablview data when i am texting in searchbar, i need to update tablview when search button in keyboard is clicked, because i get data for search in api and everytime when i am texting in searchbar it requesting and it takes long time. How i can resolve this?
var resultSearchController = UISearchController()
var indicator:UIActivityIndicatorView = UIActivityIndicatorView(activityIndicatorStyle: UIActivityIndicatorViewStyle.Gray)
var ref=UIRefreshControl()
override func viewDidLoad() {
super.viewDidLoad()
self.resultSearchController = ({
let controller = UISearchController(searchResultsController: nil)
controller.searchResultsUpdater = self
controller.dimsBackgroundDuringPresentation = false
controller.searchBar.sizeToFit()
self.tableView.tableHeaderView = controller.searchBar
return controller
})()
indicator.frame = CGRectMake(0.0, 0.0, 40.0, 40.0);
indicator.center = view.center
view.addSubview(indicator)
indicator.bringSubviewToFront(view)
indicator.startAnimating()
UIApplication.sharedApplication().networkActivityIndicatorVisible = true
getRequests.getType1(tableView,spinner: indicator)
ref.addTarget(self, action: #selector(Catalog1TableViewController.refresh(_:)), forControlEvents: UIControlEvents.ValueChanged)
ref.attributedTitle = NSAttributedString(string: "Загрузка")
tableView.addSubview(ref)
}
func updateSearchResultsForSearchController(searchController: UISearchController)
{
indicator.startAnimating()
UIApplication.sharedApplication().networkActivityIndicatorVisible = true
tableView.reloadData()
getRequests.getProduct(tableView, spinner: indicator,name: searchController.searchBar.text!)
for item in getRequests.product {
if item.productTitle.containsString(searchController.searchBar.text!){
filteredTableData.append(item)
}
}
tableView.reloadData()
}

Answer 1

Try to implement UISearchBar Delegate method :
func searchBarSearchButtonClicked(searchBar: UISearchBar)

Answer 2

You should implement something like this in your view controller.
var resultSearchController = UISearchController()
resultSearchController.searchBar.delegate = self
extension ViewController: UISearchBarDelegate {
func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {
print("search button click")
}
}