Dismissing UISearchController breaks grouped UITableViewController visual - ios

I have a UITableViewController that shows countries group by the alphabet. I added a UISearchController in code:
let searchController = UISearchController(searchResultsController: nil)
searchController.searchBar.placeholder = ""
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
definesPresentationContext = true
tableView.tableHeaderView = searchController.searchBar
The problem is that when I dismiss the search bar, the UI visual kind of breaks, showing a strange space above the search bar:
Any ideas why this happens and how to solve it?


Try adding:
searchController.hidesNavigationBarDuringPresentation = false
searchController.searchBar.sizeToFit()
self.definesPresentationContext = true

Related

I'm using UISearchController, and while using it, search bar moves up/down when I click "cancel" button. Why does it happen?

I have TableViewController: UITableViewController.
I have implemented
let searchController = UISearchController(searchResultsController: nil).
I use SearchBar as tableView.tableHeaderView
While I'm using search, SearchBar moves up/down when I click cancel button. Why does it happen?
searchController.searchBar.delegate = self
definesPresentationContext = true
searchController.dimsBackgroundDuringPresentation = false
tableView.tableHeaderView = searchController.searchBar
searchController.searchBar.returnKeyType = .done
searchController.searchBar.enablesReturnKeyAutomatically = false
check it

Search bar not showing up on the navigation bar iOS 11

I am pushing a viewController where I want a searchBar, but search bar is not showing at all. Below is the code. Am I missing something?
var searchController = UISearchController(searchResultsController: nil)
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.placeholder = "Search here..."
definesPresentationContext = true
searchController.searchBar.delegate = self
searchController.searchBar.sizeToFit()
if #available(iOS 11.0, *) {
self.navigationItem.searchController = searchController
} else {
// Fallback on earlier versions
navigationItem.titleView = searchController.searchBar
navigationItem.titleView?.layoutSubviews()
}

You need to add this line to your code:
navigationItem.hidesSearchBarWhenScrolling = false
That removes hiding searchBar while scrolling and shows it on pushing your view controller.

So, navigationItem.hidesSearchWhenScrolling only works when you set the searchController property of navigationItem NOT when you set the navigationItem.titleView to searchBar.

UISearchController in UITabBarController - strange white line appearing when NavBar collapses

I can't figure out why there is this white line appearing when I click in the search text field. The only way to prevent it from happening is to make the navigationBar.isTranslucent = false, but this is not an ideal solution. Does anyone know why this might be happening and how to fix it?
class SearchViewController: UIViewController {
let searchController = UISearchController(searchResultsController: nil)
searchController.searchResultsUpdater = self
searchController.obscuresBackgroundDuringPresentation = false
searchController.searchBar.delegate = self
searchController.searchBar.placeholder = "Search..."
navigationItem.searchController = searchController
navigationItem.hidesSearchBarWhenScrolling = false
definesPresentationContext = true
...
}
Update
I've determined that the UITabBarController is to blame for this annoyance, but I don't know why or how to fix it.

UISearchController view keeps getting pushed down when push-popping controllers from searchResultsController

I have a problem regarding the UISearchController component. I have set up a searchcontroller like this:
let searchResultsController = TSSearchResultsController(nibName: "TSSearchResultsController", bundle: nil)
searchResultsController.delegate = self
let searchController = UISearchController(searchResultsController: searchResultsController)
searchController.delegate = self
// SearchController
searchController.searchResultsUpdater = searchResultsController
searchController.hidesNavigationBarDuringPresentation = false
searchController.dimsBackgroundDuringPresentation = false
// SearchBar
searchController.searchBar.delegate = searchResultsController
searchController.searchBar.placeholder = NSLocalizedString("Search", comment: "")
searchController.searchBar.tintColor = IDAssetManager.getColorWhite()
searchController.searchBar.sizeToFit()
searchController.searchBar.searchBarStyle = .minimal
searchController.searchBar.showsCancelButton = false
self.definesPresentationContext = true
...
When I click the search result I push a view onto the navigationstack which is defined in the same place I initialise the searchController. When I come back, the searchController view has been pushed down a few a bit. This is continuously happening every time I push and pop from navigationController. I have tried self.extendedEdgesForLayout = [] but does not help.

'cancel' button of searchbar disappear in iPad

My app needs support universal devices.
And in that, there is a view controller which have UISearchController. It can show normally in iPhone device, but in iPad, the 'cancel' button disappear.
iPhone
iPad
It is the relevant code about searchbar in the view controller, following.
func configureSearchController() {
self.collectionView!.updateConstraints()
resultsTableController = SearchBookResultTableViewController()
resultsTableController.tableView.delegate = self
searchController = UISearchController(searchResultsController: resultsTableController)
searchController.searchResultsUpdater = self
navigationItem.titleView = searchController.searchBar
searchController.searchBar.sizeToFit()
searchController.dimsBackgroundDuringPresentation = false
searchController.hidesNavigationBarDuringPresentation = false
searchController.searchBar.delegate = self
searchController.searchBar.searchBarStyle = .Minimal
searchController.searchBar.placeholder = "书籍、作者、出版社"
// stress
searchController.searchBar.showsCancelButton = true
definesPresentationContext = true
}
I want to know the reason of the problem, and in which way I can solve it.
Seek help! Thx.

I found the same situation in iOS 7 in this link. And I use the same way to solve my problem. But I don't know why the way, create a new UIView, can solve it? What's the different between them?
self.collectionView!.updateConstraints()
resultsTableController = SearchBookResultTableViewController()
resultsTableController.tableView.delegate = self
searchController = UISearchController(searchResultsController: resultsTableController)
searchController.searchResultsUpdater = self
searchController.searchBar.sizeToFit()
searchController.dimsBackgroundDuringPresentation = false
searchController.hidesNavigationBarDuringPresentation = false
searchController.searchBar.delegate = self
searchController.searchBar.searchBarStyle = .Minimal
searchController.searchBar.placeholder = "书籍、作者、出版社"
let SearchView: UIView = UIView(frame: searchController.searchBar.bounds)
SearchView.addSubview(searchController.searchBar)
navigationItem.titleView = SearchView

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