Просмотр анимации / транзакции не работает при встроении в UiviewControllerRepresentable ⇐ IOS

[Anonymous]

Я создал uiviewcontrollerRepresentable Хостинг uiscrollview для создания пользовательской версии Swiftui Scroll View. При использовании одних и тех же представлений за пределами контейнера все работает, как и ожидалось:

код:
struct Demo: View {
class ViewModel: ObservableObject {
@Published var option1: Bool = false
@Published var option3: Bool = false
}

@StateObject private var viewModel = ViewModel()

@State private var option2: Bool = false
@State private var option4: Bool = false

var body: some View {
VStack {
VStack {
Text("In Scroll Container")

UIScrollContainer {
VStack(spacing: 0) {
VStack {
Toggle("ViewModel Option 1", isOn: $viewModel.option1.animation())

if viewModel.option1 {
Text("Option 1 is ON")
.padding(.vertical, 20)
}
}
.padding()
.background(.black.opacity(0.1))

VStack {
Toggle("Option 2", isOn: $option2.animation())

if option2 {
Text("Option 2 is ON")
.padding(.vertical, 20)
}
}
.padding()
.background(.black.opacity(0.2))
}
}
}
.background(.red.opacity(0.2))
.frame(maxHeight: .infinity)

VStack(spacing: 0) {
Text("Without Container")

VStack {
Toggle("ViewModel Option 3", isOn: $viewModel.option3.animation())

if viewModel.option3 {
Text("Option 3 is ON")
.padding(.vertical, 20)
}
}
.padding()
.background(.black.opacity(0.1))

VStack {
Toggle("Option 4", isOn: $option4.animation())

if option4 {
Text("Option 4 is ON")
.padding(.vertical, 20)
}
}
.padding()
.background(.black.opacity(0.2))

Spacer()
}
.background(.yellow.opacity(0.2))
.frame(maxHeight: .infinity)

}
}
}

struct UIScrollContainer: UIViewControllerRepresentable {
let content: Content

init(@ViewBuilder content: () -> Content) {
self.content = content()
}

func makeUIViewController(context: Context) -> UIViewController {
let scrollViewVC = UIViewController()
scrollViewVC.view.backgroundColor = .clear

let scrollView = UIScrollView()
scrollView.backgroundColor = .clear

let contentVC = UIHostingController(rootView: self.content)
contentVC.sizingOptions = .intrinsicContentSize
contentVC.view.backgroundColor = .clear
contentVC.safeAreaRegions = []

context.coordinator.contentVC = contentVC
context.coordinator.scrollView = scrollView
scrollView.delegate = context.coordinator

scrollView.translatesAutoresizingMaskIntoConstraints = false
scrollViewVC.view.addSubview(scrollView)

NSLayoutConstraint.activate([
scrollView.topAnchor.constraint(equalTo: scrollViewVC.view.topAnchor),
scrollView.bottomAnchor.constraint(equalTo: scrollViewVC.view.bottomAnchor),
scrollView.leadingAnchor.constraint(equalTo: scrollViewVC.view.leadingAnchor),
scrollView.trailingAnchor.constraint(equalTo: scrollViewVC.view.trailingAnchor)
])

contentVC.willMove(toParent: scrollViewVC)
scrollViewVC.addChild(contentVC)

contentVC.view.translatesAutoresizingMaskIntoConstraints = false
scrollView.addSubview(contentVC.view)
NSLayoutConstraint.activate([
contentVC.view.topAnchor.constraint(equalTo: scrollView.contentLayoutGuide.topAnchor),
contentVC.view.bottomAnchor.constraint(equalTo: scrollView.contentLayoutGuide.bottomAnchor),
contentVC.view.leadingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.leadingAnchor),
contentVC.view.trailingAnchor.constraint(equalTo: scrollView.contentLayoutGuide.trailingAnchor),

contentVC.view.widthAnchor.constraint(equalTo: scrollView.frameLayoutGuide.widthAnchor)
])

contentVC.didMove(toParent: scrollViewVC)

return scrollViewVC
}

func updateUIViewController(_ uiViewController: UIViewController, context: Context) {
withTransaction(context.transaction) {
context.coordinator.contentVC?.rootView = content
}
}

func makeCoordinator() -> Coordinator {
return Coordinator()
}

class Coordinator: NSObject, UIScrollViewDelegate {
var contentVC: UIHostingController?
var scrollView: UIScrollView?
}
}


Подробнее здесь: https://stackoverflow.com/questions/797 ... rollerrepr