I have a parent view controller and a child view controller that takes up a portion of the parent's main view:
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let childVC = ChildVC()
addChild(childVC)
childVC.view.frame = CGRect(origin: CGPoint(x: 100, y: 100), size: CGSize(width: 200, height: 200))
view.addSubview(childVC.view)
childVC.didMove(toParent: self)
}
}
class ChildVC: UIViewController {
override func loadView() {
let v = UIView()
v.backgroundColor = .cyan
view = v
}
override func viewDidLoad() {
super.viewDidLoad()
let button = UIButton(type: .system)
button.setTitle("Present", for: .normal)
button.addTarget(self, action: #selector(pressed), for: .touchUpInside)
button.sizeToFit()
view.addSubview(button)
}
#objc func pressed() {
self.definesPresentationContext = true
self.providesPresentationContextTransitionStyle = true
self.modalTransitionStyle = .crossDissolve
let pvc = PresentedVC()
pvc.modalPresentationStyle = .currentContext
self.present(pvc, animated: true, completion: nil)
}
}
class PresentedVC: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .yellow
let button = UIButton(type: .system)
button.setTitle("Dismiss", for: .normal)
button.addTarget(self, action: #selector(pressed), for: .touchUpInside)
button.sizeToFit()
view.addSubview(button)
}
#objc func pressed() {
self.dismiss(animated: true, completion: nil)
}
}
When I present a view controller using the currentContext style, it presents the new view controller as it should, covering only the child view controller's view:
However, when I dismiss it, the size of the ChildVC's main view takes up the entire screen:
When I log the superview of the ChildVC's main view, it's still a subview of the parent view controller's main view so I'm not sure why this is happening.
Just change your presentationStyle to .overCurrentContext like this:
#objc func pressed() {
self.definesPresentationContext = true
self.providesPresentationContextTransitionStyle = true
self.modalTransitionStyle = .crossDissolve
let pvc = PresentedVC()
pvc.modalPresentationStyle = .overCurrentContext // <-- here
pvc.modalTransitionStyle = .crossDissolve // <-- and here
self.present(pvc, animated: true, completion: nil)
}
It will prevent the unwanted upscaling.
Related
According to documentation,
In a horizontally compact environment, popovers adapt to the
UIModalPresentationOverFullScreen presentation style by default.
See below image. In compact environment, popover appear from bottom and animate to top until it covers the entire screen.
Is it possible to override this behaviour and have the popover only covering certain height of the screen as shown below?
Following code demonstrate the default behaviour of popover adapting to FullScreen presentation style in compact environment.
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = .systemBackground
let button = UIButton()
button.translatesAutoresizingMaskIntoConstraints = false
button.setImage(UIImage(systemName: "square.grid.2x2.fill"), for: .normal)
button.addTarget(self, action: #selector(displayPopover), for: .touchUpInside)
self.view.addSubview(button)
NSLayoutConstraint.activate([
button.topAnchor.constraint(equalTo: self.view.topAnchor, constant: 100),
button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
button.widthAnchor.constraint(equalToConstant: 40),
button.heightAnchor.constraint(equalToConstant: 40),
])
}
#IBAction func displayPopover(sender: UIButton!) {
let popoverVC = PopoverViewController()
popoverVC.preferredContentSize = CGSize(width: 300, height: 200)
popoverVC.modalPresentationStyle = .popover
popoverVC.popoverPresentationController?.sourceView = sender
popoverVC.popoverPresentationController?.permittedArrowDirections = .up
self.present(popoverVC, animated: true, completion: nil)
}
}
class PopoverViewController: UIViewController {
override func viewDidLoad() {
self.view.backgroundColor = .systemGray
}
}
Output:
Thank you 🙇♂️
This feature is now available with iOS 15.
Watch WWDC2021 short video
Download WWDC sample project from here
#IBAction func showImagePicker(_ sender: UIBarButtonItem) {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.modalPresentationStyle = .popover
if let popover = imagePicker.popoverPresentationController {
popover.barButtonItem = sender
let sheet = popover.adaptiveSheetPresentationController
sheet.detents = [.medium(), .large()]
sheet.largestUndimmedDetentIdentifier = .medium
sheet.prefersScrollingExpandsWhenScrolledToEdge = false
sheet.prefersEdgeAttachedInCompactHeight = true
sheet.widthFollowsPreferredContentSizeWhenEdgeAttached = true
}
present(imagePicker, animated: true, completion: nil)
}
I am trying to change the value of one ViewController by clicking a button inside a second ViewController with delegation.
But so far it only prints a message, but doesn't change the value.
I have this class where I defined a view:
class CounterView: UIView {
public var creditPointValue = Int()
let label = UILabel()
override init(frame: CGRect) {
super.init(frame: frame)
self.translatesAutoresizingMaskIntoConstraints = false
backgroundColor = .cyan
self.addSubview(label)
label.text = "Credit Points: \(creditPointValue)"
label.translatesAutoresizingMaskIntoConstraints = false;
label.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
label.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
}
func changeCreditPointValue(value:Int){
creditPointValue = creditPointValue + value
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
I am using that view inside this ViewController and I want to manipulate the variable "creditPointValue":
protocol AddCreditsDelegate {
func addCreditsToCounter()
}
class ViewController: UIViewController {
var delegate: AddCreditsDelegate?
var counterView = CounterView()
let label = UILabel()
let button = UIButton(frame: CGRect(x: 100, y: 100, width: 100, height: 50))
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
view.backgroundColor = .white
view.addSubview(button)
button.backgroundColor = .red
button.setTitle("View2", for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.addTarget(self, action: #selector(changeView), for: .touchUpInside)
button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
}
override func viewDidAppear(_ animated: Bool) {
view.addSubview(counterView)
counterView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
counterView.leftAnchor.constraint(equalTo: view.leftAnchor).isActive = true
counterView.rightAnchor.constraint(equalTo: view.rightAnchor).isActive = true
//counterView.frame.size.height = 30
counterView.bottomAnchor.constraint(equalTo: counterView.topAnchor, constant: 50).isActive = true
}
#objc func changeView(){
delegate?.addCreditsToCounter()
navigationController?.pushViewController(ViewController2(), animated: true)
}
}
And inside this second ViewController I am trying to change the value by clicking the button I added to the view:
class ViewController2: UIViewController {
let button = UIButton(frame: CGRect(x: 100, y: 100, width: 100, height: 50))
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
view.addSubview(button)
button.backgroundColor = .red
button.setTitle("add Credits", for: .normal)
button.translatesAutoresizingMaskIntoConstraints = false
button.addTarget(self, action: #selector(addCreditsButton), for: .touchUpInside)
button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
}
#objc func addCreditsButton(){
addCreditsToCounter()
}
}
extension ViewController2 : AddCreditsDelegate{
func addCreditsToCounter() {
let vc = ViewController()
vc.delegate = self
vc.counterView.creditPointValue += 5
print("pressed")
}
}
So far only the message "pressed" gets printed each time I click the button and I don't even know if I am going into the right direction with my approach trying to use delegation.
You should not create a new ViewController instance each time you call ViewController2.addCreditsToCounter, you already have a ViewController that creates a ViewController2 instance in ViewController.changeView. Just store a weak reference to ViewController in ViewController2 using delegate. In such case ViewController (not ViewController2) should conform to AddCreditsDelegate.
First of all, replace
protocol AddCreditsDelegate {
func addCreditsToCounter()
}
with
protocol AddCreditsDelegate: AnyObject {
func addCreditsToCounter()
}
Then add weak var delegate: AddCreditsDelegate? to ViewController2 and remove ViewController.delegate. Remove ViewController2.addCreditsToCounter, ViewController2 should not conform to AddCreditsDelegate. It means that in ViewController2.addCreditsButton you should call delegate?.addCreditsToCounter(), not addCreditsToCounter().
ViewController should conform to AddCreditsDelegate:
extension ViewController: AddCreditsDelegate {
func addCreditsToCounter() {
counterView.creditPointValue += 5
print("pressed")
}
}
And don't forget to initialize ViewController2.delegate. Replace your ViewController.changeView implementation with
let controller = ViewController2()
controller.delegate = self
navigationController?.pushViewController(controller, animated: true)
You create a new instance here
let vc = ViewController()
instead you need
#objc func changeView() {
let sec = ViewController2(),
sec.delegate = self
navigationController?.pushViewController( animated: true)
}
Then declare this inside the SecondVC
weak var delegate:ViewController?
Finally
func addCreditsToCounter() {
delegate?.counterView.creditPointValue += 5
print("pressed")
}
Some RootViewController presents a ParentViewController which than presents a ChildViewController.
How can I dissmiss the ChildViewController animated directly to the RootViewController whithout showing the ParentViewController again?
In Detail
Assume some presents the ParentViewController which lets the user enter some credentials to login to some user account.
Once the connection is established the ParentViewController presents the ChildViewController which shows connection / account details to the user
When the user closes the ChildViewController it should be dismissed animated (slide down, etc.). But instead of returning to the ParentViewController the user should get back directly to the RootViewController
Of course it would be possible, that the ParentViewController does not present the ChildViewController itself but (somehow) tells the RootViewController to this. This way it would be no problem to directly return from the ChildViewController to the RootViewController. However, this is NOT what I am looking for, since the RootViewController should not know about the ChildViewController or even care if the ParentViewController presents other VCs.
I am looking for a solution where the ParentViewController controls whether itself is shown after the VC it presented is dismissed or its parent (= the root VC).
Code:
typealias CompletionBlock = () -> Void
class RootViewController: UIViewController {
#IBAction func showParentVC(_ sender: Any) {
let parentVC = ParentViewController()
parentVC.completion = {
self.dismiss(animated: true, completion: nil)
}
present(parentVC, animated: true)
}
}
class ParentViewController: UIViewController {
var completion: CompletionBlock?
#IBAction func showChild(_ sender: Any) {
let childVC = ChildViewController()
childVC.completion = {
self.completion?()
}
present(childVC, animated: true)
}
}
class ChildViewController: UIViewController {
var completion: CompletionBlock?
#IBAction func close(_ sender: Any) {
completion?()
}
}
Using this code does NOT solve the described problem. If close is called on the ChildViewController the RootViewController calls self.dismiss(animated: true, completion: nil). This way the ChildViewController animates away and the ParentViewController becomes visible. Then the ParentViewController animates away and the RootViewControllerbecomes visible.
How to skip the ParentViewController and directly show the RootViewController after animating away the ChildViewController?
My recommendation is embed your RootViewController into a NavigationController (if you don't have it yet) and present both parent a child with
navigationController?.present(viewController, animated: true, completion: nil)
//instead of viewController.present(...)
And then youcan use this method from your childViewController
navigationController?.popToRootViewController(animated: true)
One approach would be to set the view's alpha to Zero when you present another VC onto the "stack" of presented VCs.
So, present the first modal VC from the "root" VC as normal. For each "child" that presents another VC, use:
present(vc, animated: true, completion: {
self.view.alpha = 0.0
})
Now, when you call-back to the "root" VC to dismiss all the VCs, you won't see the partial / flash of the intermediate VC / VCs.
Here is a complete example to test. No #IBOutlets or #IBActions ... just start with a black view controller and assign its Custom Class to MultiPresentDismissViewController:
import UIKit
class MultiPresentDismissViewController: UIViewController {
let theLabel: UILabel = {
let v = UILabel()
v.textAlignment = .center
v.font = UIFont.boldSystemFont(ofSize: 40)
v.backgroundColor = .yellow
v.text = "\"Root\" VC"
return v
}()
let showAnotherButton: UIButton = {
let v = UIButton()
v.backgroundColor = UIColor(white: 0.9, alpha: 1.0)
v.setTitle("Present a VC", for: .normal)
v.setTitleColor(.blue, for: .normal)
v.setTitleColor(.cyan, for: .highlighted)
return v
}()
let theStackView: UIStackView = {
let v = UIStackView()
v.axis = .vertical
v.alignment = .fill
v.distribution = .fill
v.spacing = 32
return v
}()
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
[theLabel, showAnotherButton].forEach {
theStackView.addArrangedSubview($0)
$0.layer.borderWidth = 1.0
}
theStackView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(theStackView)
NSLayoutConstraint.activate([
theStackView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
theStackView.topAnchor.constraint(equalTo: view.topAnchor, constant: 100.0),
theStackView.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.8),
])
showAnotherButton.addTarget(self, action: #selector(presentAnotherVC), for: .touchUpInside)
}
#objc func presentAnotherVC() -> Void {
let vc = AnotherViewController()
vc.myID = 1
present(vc, animated: true, completion: nil)
}
}
class AnotherViewController: UIViewController {
let theLabel: UILabel = {
let v = UILabel()
v.textAlignment = .center
v.font = UIFont.boldSystemFont(ofSize: 100)
v.backgroundColor = .yellow
return v
}()
let showAnotherButton: UIButton = {
let v = UIButton()
v.backgroundColor = UIColor(white: 0.9, alpha: 1.0)
v.setTitle("Present Another VC", for: .normal)
v.setTitleColor(.blue, for: .normal)
v.setTitleColor(.cyan, for: .highlighted)
return v
}()
let defaultDismissButton: UIButton = {
let v = UIButton()
v.backgroundColor = UIColor(white: 0.9, alpha: 1.0)
v.setTitle("Default Dismiss All", for: .normal)
v.setTitleColor(.blue, for: .normal)
v.setTitleColor(.cyan, for: .highlighted)
return v
}()
let theStackView: UIStackView = {
let v = UIStackView()
v.axis = .vertical
v.alignment = .fill
v.distribution = .fill
v.spacing = 20
return v
}()
var myID: Int = 0
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .random()
[theLabel, showAnotherButton, defaultDismissButton].forEach {
theStackView.addArrangedSubview($0)
$0.layer.borderWidth = 1.0
}
theStackView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(theStackView)
NSLayoutConstraint.activate([
theStackView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
theStackView.topAnchor.constraint(equalTo: view.topAnchor, constant: 100.0),
theStackView.widthAnchor.constraint(equalTo: view.widthAnchor, multiplier: 0.8),
])
theLabel.text = "\(myID)"
showAnotherButton.addTarget(self, action: #selector(presentAnotherVC), for: .touchUpInside)
defaultDismissButton.addTarget(self, action: #selector(defaultDismissAll), for: .touchUpInside)
}
#objc func presentAnotherVC() -> Void {
let vc = AnotherViewController()
vc.myID = myID + 1
present(vc, animated: true, completion: {
self.view.alpha = 0.0
})
}
#objc func defaultDismissAll() -> Void {
// walk up the "presenting" hierarchy to find the "root" VC
var vc = self.presentingViewController
while vc?.presentingViewController != nil {
vc = vc?.presentingViewController
}
vc?.dismiss(animated: true, completion: nil)
}
}
extension CGFloat {
static func random() -> CGFloat {
return CGFloat(arc4random()) / CGFloat(UInt32.max)
}
}
extension UIColor {
static func random() -> UIColor {
return UIColor(red: .random(),
green: .random(),
blue: .random(),
alpha: 1.0)
}
}
I have the scheme: UITabBarViewController (with 3 tabs).
In all that tabs I don't want to show navigation menu on top.
And from the first tab, I want to push another view controller from button click that will have "back" button (and top toolbar with "cancel")
I tried some ways - in storyboard with push segue - no back button.
Probably because i don't have navigation view controller, so my navigation stack is empty.
Programmatically:
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let nextViewController = storyBoard.instantiateViewController(withIdentifier: "AddCoinTableViewController") as! AddCoinTableViewController
self.present(nextViewController, animated:true, completion:nil)
If I embed tabs in navigation controller, then I have top toolbar (which I don't want).
Any ideas how to make it?
You can't achieve navigation functionality without using UINavigationController. I mean you have to do all animation kind of stuff on your own, and I think that's not a good idea. Rather than that, you can use UINavigationController, and if you don't want to show navigationBar at some viewController, than do as follows for those view controllers.
override func viewWillApear() {
super.viewDidLoad()
self.navigationController?.isNavigationBarHidden = true
}
override func viewWillDisappear(animated: Bool) {
self.navigationController?.isNavigationBarHidden = false
}
You can embed the navigation controller at your first tab controller (or any you want), and hide it at the controllers you don't want on their viewDidLoad like this:
self.navigationController?.isNavigationBarHidden = true
Doing this, you will be able to see the back Button at the controllers you pushed and didn't hide the navigationBar.
Make sure you push the controller using the navigation controller like this:
self.navigationController?.pushViewController(YOUR VIEW CONTROLLER, animated: true)
The below code will allow you to create your own Navigation handling class and have the "push" "pop" animation that UINavigationController has.. You can create a new project, copy paste the below into ViewController.swift and see for yourself..
Now you can give any UIViewController navigation controller abilities..
import UIKit
class NavigationHandler : NSObject, UIViewControllerTransitioningDelegate, UIViewControllerAnimatedTransitioning, UINavigationBarDelegate {
private var isPresenting: Bool = false
private weak var controller: UIViewController?
init(controller: UIViewController) {
super.init()
self.controller = controller
controller.transitioningDelegate = self
let navigationBar = UINavigationBar()
controller.view.addSubview(navigationBar)
NSLayoutConstraint.activate([
navigationBar.leftAnchor.constraint(equalTo: controller.view.leftAnchor),
navigationBar.rightAnchor.constraint(equalTo: controller.view.rightAnchor),
navigationBar.topAnchor.constraint(equalTo: controller.view.safeAreaLayoutGuide.topAnchor)
])
navigationBar.translatesAutoresizingMaskIntoConstraints = false
navigationBar.delegate = self
let item = UINavigationItem(title: controller.title ?? "")
let barButton = UIBarButtonItem(title: "Back", style: .done, target: self, action: #selector(onBackButton(button:)))
item.leftBarButtonItems = [barButton]
navigationBar.setItems([item], animated: true)
}
func position(for bar: UIBarPositioning) -> UIBarPosition {
return .topAttached
}
#objc
private func onBackButton(button: UIBarButtonItem) {
self.controller?.dismiss(animated: true, completion: nil)
}
func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.isPresenting = true;
return self;
}
func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
self.isPresenting = false;
return self;
}
func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
return 0.25;
}
func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
let duration = self.transitionDuration(using: transitionContext)
let fromController = transitionContext.viewController(forKey: .from)
let toController = transitionContext.viewController(forKey: .to)
let containerView = transitionContext.containerView
if self.isPresenting {
let frame = fromController!.view.frame
containerView.addSubview(toController!.view)
toController?.view.frame = CGRect(x: frame.origin.x + frame.width, y: frame.origin.y, width: frame.width, height: frame.height)
UIView.animate(withDuration: duration, animations: {
fromController?.view.frame = CGRect(x: frame.origin.x - frame.size.width, y: frame.origin.y, width: frame.size.width, height: frame.size.height)
toController?.view.frame = frame
}, completion: { (completed) in
transitionContext.completeTransition(true)
})
}
else {
let frame = fromController!.view.frame
containerView.insertSubview(toController!.view, at: 0)
toController?.view.frame = CGRect(x: frame.origin.x - frame.size.width, y: frame.origin.y, width: frame.size.width, height: frame.size.height)
UIView.animate(withDuration: duration, animations: {
fromController?.view.frame = CGRect(x: frame.origin.x + frame.width, y: frame.origin.y, width: frame.width, height: frame.height)
toController?.view.frame = frame
}, completion: { (completed) in
transitionContext.completeTransition(true)
})
}
}
}
View Controllers for testing:
class ViewController : UIViewController {
private var navigationHandler: NavigationHandler?
override func viewDidLoad() {
super.viewDidLoad()
let button = UIButton(type: .custom)
button.setTitle("Push Controller", for: .normal)
button.setTitleColor(UIColor.red, for: .normal)
button.layer.borderColor = UIColor.black.cgColor
button.layer.borderWidth = 1.0
button.layer.cornerRadius = 5.0
button.translatesAutoresizingMaskIntoConstraints = false
self.view.addSubview(button)
NSLayoutConstraint.activate([
button.centerXAnchor.constraint(equalTo: self.view.centerXAnchor),
button.centerYAnchor.constraint(equalTo: self.view.centerYAnchor),
button.heightAnchor.constraint(equalToConstant: 45.0),
button.widthAnchor.constraint(equalToConstant: 150.0)
])
button.addTarget(self, action: #selector(onPush(button:)), for: .touchUpInside)
}
#objc
private func onPush(button: UIButton) {
let child = ChildViewController()
self.navigationHandler = NavigationHandler(controller: child)
self.present(child, animated: true, completion: nil)
}
}
class ChildViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.blue
}
}
I have a UISearchBar in my application. When I press a button to "open" the searchbar does a new view appear. But the problem is that the NavigationController changes and the UISearchBar disappear. How can I do so I can keep the current NavigationController with my searchbar even if a new view appear. (So I still searching when the new view appear)
P.s my code is not the best and I´m not using Storyboard!
class HomeController: UICollectionViewController, UICollectionViewDelegateFlowLayout, UISearchBarDelegate {
override func viewDidLoad() {
super.viewDidLoad()
collectionView?.backgroundColor = UIColor.white
setupNavigationBar()
}
Here is the new view that appear:
class UserSearchController: UICollectionViewController, UISearchBarDelegate {
override func viewDidLoad() {
super.viewDidLoad()
collectionView?.backgroundColor = UIColor.blue
}
}
And here is the whole searchbar code:
import UIKit
var searchBar = UISearchBar()
var searchBarButtonItem: UIBarButtonItem?
var logoImageView: UIImageView!
extension HomeController {
func setupNavigationBar() {
let button = UIButton(type: .system)
button.setImage(#imageLiteral(resourceName: "search"), for: .normal)
button.addTarget(self, action: #selector(showSearchBar), for: .touchUpInside)
button.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
let barButton = UIBarButtonItem(customView: button)
self.navigationItem.rightBarButtonItem = barButton
let logoImage = UIImage(named: "home")!
logoImageView = UIImageView(frame: CGRect(x: 0, y: 0, width: logoImage.size.width, height: logoImage.size.height))
logoImageView.image = logoImage
navigationItem.titleView = logoImageView
searchBar.delegate = self
searchBar.searchBarStyle = UISearchBarStyle.minimal
searchBar.placeholder = "Search"
searchBar.barTintColor = UIColor.gray
searchBarButtonItem = navigationItem.rightBarButtonItem
}
func showSearchBar() {
let layout = UICollectionViewFlowLayout()
let userSearchController = UserSearchController(collectionViewLayout: layout)
self.navigationController?.pushViewController(userSearchController, animated: true)
searchBar.alpha = 0
navigationItem.titleView = searchBar
navigationItem.setLeftBarButton(nil, animated: true)
navigationItem.rightBarButtonItem = nil
searchBar.showsCancelButton = true
UIView.animate(withDuration: 0.5, animations: {
self.searchBar.alpha = 1
}, completion: { finished in
self.searchBar.becomeFirstResponder()
})
}
public func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
hideSearchBar()
}
func hideSearchBar() {
navigationItem.setRightBarButton(searchBarButtonItem, animated: true)
logoImageView.alpha = 0
UIView.animate(withDuration: 0.3, animations: {
self.navigationItem.titleView = self.logoImageView
self.logoImageView.alpha = 1
}, completion: { finished in
})
}
}
The reason why your search bar is only visible on your first View Controller is because you are using the View Controller's titleView property. Each UIViewController has it's own titleView property, so if you push a View Controller onto your first VC, it will also need to have the titleView property set to a search bar view with the required configuration.
I think you can create a base class, add UISearchBar above the base class, and then you want the current controller with UISearchBar to inherit your base class