Styjun

I am trying to get a smooth Searchbar on navigation item on iOS 9, which means I can't use navigationItem.searchController property since its only iOS 11 only.

class SearchContainerViewController: UITableViewController 
 let dataSource = ["1", "2", "3", "4", "5"]

 override public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int 
 return dataSource.count
 

 override public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell 
 let cell = UITableViewCell(style: .default, reuseIdentifier: nil)
 cell.textLabel?.text = dataSource[indexPath.row]

 return cell
 

 override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) 
 dismiss(animated: true, completion: nil)
 


class SearchViewController: UISearchController 
 override func viewDidLoad() 
 super.viewDidLoad()
 


class MyViewController : UIViewController, UISearchResultsUpdating, UISearchBarDelegate 
 lazy var searchButton = UIBarButtonItem(title: "Search", style: UIBarButtonItem.Style.plain, target: self, action: #selector(showSearchBar))

 var searchViewController: SearchViewController = 
 let container = SearchContainerViewController()
 let searchController = SearchViewController(searchResultsController: container)

 return searchController
 ()

 override func viewDidLoad() 
 super.viewDidLoad()

 setupSearchController()
 setupSearchButton()
 

 func setupSearchController() 
 searchViewController.searchResultsUpdater = self
 searchViewController.searchBar.delegate = self

 searchViewController.dimsBackgroundDuringPresentation = false
 searchViewController.hidesNavigationBarDuringPresentation = false
 searchViewController.searchBar.searchBarStyle = .minimal
 searchViewController.searchBar.showsCancelButton = true

 definesPresentationContext = true
 

 @objc func showSearchBar() 
 UIView.animate(withDuration: 0.75) 
 self.navigationItem.titleView = self.searchViewController.searchBar
 self.navigationItem.rightBarButtonItem = nil
 self.searchViewController.searchBar.becomeFirstResponder()
 
 

 func setupSearchButton() 
 UIView.animate(withDuration: 0.75) 
 self.navigationItem.titleView = nil
 self.navigationItem.rightBarButtonItem = self.searchButton
 
 

 // MARK: Conforms to UISearchResultUpdating

 public func updateSearchResults(for searchController: UISearchController) 

 func searchBarCancelButtonClicked(_ searchBar: UISearchBar) 
 setupSearchButton()
 

 override func viewDidAppear(_ animated: Bool) 
 super.viewDidAppear(animated)
 view.layoutSubviews()
 



@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate 

 var window: UIWindow?

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool 
 // Override point for customization after application launch.
 let newWindow = UIWindow(frame: UIScreen.main.bounds)

 let mainViewController = MyViewController()
 let navigationController = UINavigationController(rootViewController: mainViewController)

 newWindow.backgroundColor = .white
 newWindow.rootViewController = navigationController
 newWindow.makeKeyAndVisible()

 window = newWindow

 return true
 

Though the result is kinda disappointing since the textview with StatusBar is clipping out of the navigation item context, there is anything im doing wrong and could've done better?

Appreciate your support.

In before people down voting the question for no reasons, I am going to do something different and answer my own question.

The clipping happened because in both situations the height of the navigationItem were different because of they are somewhat stretchable if put big content in titleView (like a searchBar).

I've set the searchBar from the start on the navigationItem and just toogle their isHidden property when it should be done.

 @objc private func activateSearch() 
 UIView.animate(withDuration: 0.75) 
 self.navigationItem.titleView?.isHidden = false
 self.navigationItem.rightBarButtonItem = nil
 self.searchController.isActive = true
 
 

 private func deactivateSearch() 
 UIView.animate(withDuration: 0.75) 
 self.navigationItem.titleView?.isHidden = true
 self.navigationItem.rightBarButtonItem = self.searchButton
 self.searchController.isActive = false