SwiftUI: How to navigate from UIViewRepresentable to SwiftUI View - ios

Question

I am using KVKCalendar on my SwiftUI application. I connected the UIKit library with bridge class called UIViewRepresntable. In this class, i override function which looks like:
func didSelectEvent(_ event: Event, type: CalendarType, frame: CGRect?){
// in this function i would like to redirect to SwiftUI View called EventDetailScreen(event.ID)
}
Also i added weak var navigationController: UINavigationController? in the top of Coordinator class so the whole class CalendarDisplayView, the bridge:
import SwiftUI
import EventKit
struct CalendarDisplayView: UIViewRepresentable {
#Binding var events: [Event]
#Binding var updatedDate: Date?
private var calendar = CalendarView(frame: .zero)
var selectDate = Date()
func makeUIView(context: UIViewRepresentableContext<CalendarDisplayView>) -> CalendarView {
calendar.dataSource = context.coordinator
calendar.delegate = context.coordinator
calendar.reloadData()
return calendar
}
func updateUIView(_ uiView: CalendarView, context: UIViewRepresentableContext<CalendarDisplayView>) {
context.coordinator.events = events
calendar.reloadData()
}
func makeCoordinator() -> CalendarDisplayView.Coordinator {
Coordinator(self)
}
public init(events: Binding<[Event]>, updatedDate: Binding<Date?>) {
self._events = events
var style = Style()
self._updatedDate = updatedDate
selectDate = Date()
var frame = UIScreen.main.bounds
frame.origin.y = 0
frame.size.height -= 160
calendar = CalendarView(frame: frame, style: style)
}
// MARK: Calendar DataSource and Delegate
class Coordinator: NSObject, CalendarDataSource, CalendarDelegate {
weak var navigationController: UINavigationController? //Added it by myself
func eventsForCalendar(systemEvents: [EKEvent]) -> [Event] {
return events
}
private var view: CalendarDisplayView
var events: [Event] = [] {
didSet {
view.calendar.reloadData()
}
}
var type: CalendarType = .day {
didSet {
view.calendar.set(type: type, date: view.selectDate)
view.calendar.reloadData()
}
}
var updatedDate: Date? {
didSet {
if let date = updatedDate {
view.selectDate = date
view.calendar.reloadData()
}
}
}
init(_ view: CalendarDisplayView) {
self.view = view
super.init()
}
func didSelectDates(_ dates: [Date], type: CalendarType, frame: CGRect?) {
updatedDate = dates.first ?? Date()
}
func didSelectEvent(_ event: Event, type: CalendarType, frame: CGRect?) {
// PROBLEM
}
}
}
CalendarScreen SwiftUI View
import SwiftUI
struct CalendarScreen: View {
#State private var typeCalendar = CalendarType.day
#State private var events: [Event] = []
#State private var updatedDate: Date?
#StateObject var viewModel = ViewModel()
var body: some View {
NavigationView {
ZStack(alignment: .trailing) {
CalendarDisplayView(events: $events, updatedDate: $updatedDate)
.edgesIgnoringSafeArea(.bottom)
}
}.onAppear{
viewModel.fetchCalendarEvents()
.navigationViewStyle(StackNavigationViewStyle())
}
}
I tried to create NavigationLink in function but it cant have return, because this is function that i override from KVKCalendar library.
func didSelectEvent(_ event: Event, type: CalendarType, frame: CGRect?){
NavigationLink(destination: EventDetailScreen(event.ID))
}
Moreover i tried to attach UIHostingController but didnt work aswell.
func didSelectEvent(_ event: Event, type: CalendarType, frame: CGRect?){
let screen = UIHostingController(rootView: EventDetailScreen(event.ID))
self.navigationController?.pushViewController(screen, animated: true)
}
I was trying to search how to change view from UIView class to SwiftUI view class but without proper result. Probably, it was wrong path.

Answer 1

Actually i found an answer by adding an extension CalendarDisplayView
extension UIView {
var parentViewController: UIViewController? {
var parentResponder: UIResponder? = self
while parentResponder != nil {
parentResponder = parentResponder?.next
if let viewController = parentResponder as? UIViewController {
return viewController
}
}
return nil
}
}
and adding code in didSelectEvent
view.calendar.parentViewController?.navigationController?.pushViewController(EventDetialScreen(event.ID), animated: true)