reset the UIView when UISearchController is focused - swift

Question

I am facing an issue where I can see a black portion in my UIViewController where I have a UISearchController, UICollectionView and UISegmentControl because of my poor design.
I have added a UISearchController in navigationbar using following code:
func setupSearchBar(){
navigationItem.searchController = taskSearchController
taskSearchController.searchBar.tintColor = .white
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).defaultTextAttributes = [NSAttributedStringKey.foregroundColor.rawValue: UIColor.lightGray]
UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).attributedPlaceholder = NSAttributedString(string: "Search Text", attributes: [NSAttributedStringKey.foregroundColor: UIColor.lightGray])
if let textfield = taskSearchController.searchBar.value(forKey: "searchField") as? UITextField {
if let backgroundview = textfield.subviews.first {
backgroundview.backgroundColor = UIColor.init(white: 1, alpha: 1)
backgroundview.layer.cornerRadius = 10
backgroundview.clipsToBounds = true
}
}
taskSearchController.hidesNavigationBarDuringPresentation = true
//navigationItem.hidesSearchBarWhenScrolling = false
//taskSearchController.searchBar.scopeButtonTitles = ["ASSIGNED TASK","CREATED TASK"]
}
after adding UISearchController I am adding a UISegmentControl and a UICollectionView using following code:
func setupView(){
//self.view.addSubview(coverView)
self.view.addSubview(taskSegment)
taskSegment.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
taskSegment.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
taskSegment.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
taskSegment.heightAnchor.constraint(equalToConstant: 30).isActive = true
self.view.addSubview(collectionView)
collectionView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor).isActive = true
collectionView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor).isActive = true
collectionView.topAnchor.constraint(equalTo: taskSegment.bottomAnchor, constant: 10).isActive = true
collectionView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 5).isActive = true
}
This my initial view which is fine.
This is how it looks when UISearchController is focused
Here you can see when navigationBar hides and UISearchController placed at top at that time my UISegment and UIcollectionView remains at same position so I want to move it according to change in UISearchController.
Can anyone tell me what should I do?
Thank You in advance.

Answer 1

It hides the navigation bar because hideNavigationBarDuringPresentation is set to true. This is intended behavior.
You either need to disable this so that the view constraints dont change during presentation or you need to amend your constraints so that the view would adjust to the height change of the navigation bar. You should be able to do this quite easily by setting a top constraint to the Safe area of the main view.