Adding a search bar to ui table view on overlay - swift

Question

I have managed to create, a dark overlay once clicked a search icon and have managed to add a table uiview on the dark overlay but now want to add a search bar within that table view. I cant seem to figure it out as my code seems different to everyone else's examples. I am new to swift so my code probably isn't the cleanest. can i ask if someone can show me how to do this as i am out of ideas. I have posted my code below can someone please show me where i'm going wrong.
Many thanks
class SearchLauncher: NSObject {
let blackView = UIView()
let tableView = UITableView()
#objc func showSearch() {
if let window = UIApplication.shared.keyWindow {
blackView.backgroundColor = UIColor(white: 0, alpha: 0.5)
blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
window.addSubview(blackView)
window.addSubview(tableView)
let height: CGFloat = 600
let y = window.frame.height - height
tableView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: height)
blackView.frame = window.frame
blackView.alpha = 0
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
self.blackView.alpha = 1
self.tableView.frame = CGRect(x: 0, y: y, width: self.tableView.frame.width, height: self.tableView.frame.height)
}, completion: nil)
}
}
#objc func handleDismiss() {
UIView.animate(withDuration: 0.5) {
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.tableView.frame = CGRect(x: 0, y: window.frame.height, width: self.tableView.frame.width, height: self.tableView.frame.height)
}
}
}
override init() {
super.init()
//start doing something here maybe
}
}```

Answer 1

How did you try to add a search controller?
I would do it by adding an UISearchController as a tableHeaderView of your table view. First make sure to add UISearchResultsUpdating protocol to your class.
class SearchLauncher: NSObject, UISearchResultsUpdating
Then add the search bar to your table view
let searchController = UISearchController(searchResultsController: nil)
searchController.searchBar.sizeToFit()
searchController.searchResultsUpdater = self
//you probably don't need this
//searchController.dimsBackgroundDuringPresentation = false
tableView.tableHeaderView = searchController.searchBar
And then, implement the updateSearchResults(for:_) delegate method
func updateSearchResults(for searchController: UISearchController) {
filteredTableData.removeAll(keepingCapacity: false)
//filter the table data by using searchController.searchBar.text!
//filteredTableData = ...
self.tableView.reloadData()
}