UIViewRepresentable content not updating - ios

Question

I have implemented a UIViewRepresentable for scrollview as I needed the index of scrolled content. Everything works great except an issue where the content of the scroll is not updating.
struct SwiftyUIScrollView<Content>: UIViewRepresentable where Content: View {
typealias UIViewType = Scroll
var content: () -> Content
var pagingEnabled: Bool = false
var hideScrollIndicators: Bool = false
#Binding var shouldUpdate: Bool
#Binding var currentIndex: Int
var onScrollIndexChanged: ((_ index: Int) -> Void)
public init(pagingEnabled: Bool,
hideScrollIndicators: Bool,
currentIndex: Binding<Int>,
shouldUpdate: Binding<Bool>,
#ViewBuilder content: #escaping () -> Content, onScrollIndexChanged: #escaping ((_ index: Int) -> Void)) {
self.content = content
self.pagingEnabled = pagingEnabled
self._currentIndex = currentIndex
self._shouldUpdate = shouldUpdate
self.hideScrollIndicators = hideScrollIndicators
self.onScrollIndexChanged = onScrollIndexChanged
}
func makeUIView(context: UIViewRepresentableContext<SwiftyUIScrollView>) -> UIViewType {
let hosting = UIHostingController(rootView: content())
let view = Scroll(hideScrollIndicators: hideScrollIndicators, isPagingEnabled: pagingEnabled)
view.scrollDelegate = context.coordinator
view.alwaysBounceHorizontal = true
view.addSubview(hosting.view)
makefullScreen(of: hosting.view, to: view)
return view
}
class Coordinator: NSObject, ScrollViewDelegate {
func didScrollToIndex(_ index: Int) {
self.parent.onScrollIndexChanged(index)
}
var parent: SwiftyUIScrollView
init(_ parent: SwiftyUIScrollView) {
self.parent = parent
}
}
func makeCoordinator() -> SwiftyUIScrollView<Content>.Coordinator {
Coordinator(self)
}
func updateUIView(_ uiView: Scroll, context: UIViewRepresentableContext<SwiftyUIScrollView<Content>>) {
if shouldUpdate {
uiView.scrollToIndex(index: currentIndex)
}
}
func makefullScreen(of childView: UIView, to parentView: UIView) {
childView.translatesAutoresizingMaskIntoConstraints = false
childView.leftAnchor.constraint(equalTo: parentView.leftAnchor).isActive = true
childView.rightAnchor.constraint(equalTo: parentView.rightAnchor).isActive = true
childView.topAnchor.constraint(equalTo: parentView.topAnchor).isActive = true
childView.bottomAnchor.constraint(equalTo: parentView.bottomAnchor).isActive = true
}
}
Then created a new class to handle the delegates of a scrollview.
class Scroll: UIScrollView, UIScrollViewDelegate {
var hideScrollIndicators: Bool = false
var scrollDelegate: ScrollViewDelegate?
var tileWidth = 270
var tileMargin = 20
init(hideScrollIndicators: Bool, isPagingEnabled: Bool) {
super.init(frame: CGRect.zero)
showsVerticalScrollIndicator = !hideScrollIndicators
showsHorizontalScrollIndicator = !hideScrollIndicators
delegate = self
self.isPagingEnabled = isPagingEnabled
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let currentIndex = scrollView.contentOffset.x / CGFloat(tileWidth+tileMargin)
scrollDelegate?.didScrollToIndex(Int(currentIndex))
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let currentIndex = scrollView.contentOffset.x / CGFloat(tileWidth+tileMargin)
scrollDelegate?.didScrollToIndex(Int(currentIndex))
}
func scrollToIndex(index: Int) {
let newOffSet = CGFloat(tileWidth+tileMargin) * CGFloat(index)
contentOffset = CGPoint(x: newOffSet, y: contentOffset.y)
}
}
Now to implement the scrollView I used the below code.
#State private var activePageIndex: Int = 0
#State private var shouldUpdateScroll: Bool = false
#State private var tables: [Table] = []
SwiftyUIScrollView(pagingEnabled: false, hideScrollIndicators: true, currentIndex: $activePageIndex, shouldUpdate: $shouldUpdateScroll, content: {
HStack(spacing: 20) {
ForEach(self.tables, id: \.id) { data in
self.cardView(data: data)
}
}
.padding(.horizontal, 30.0)
}, onScrollIndexChanged: { (newIndex) in
shouldUpdateScroll = false
activePageIndex = index
// Your own required handling
})
func getTheNextView(data: Any) -> AnyView {
// Return the required destination View
}
If initially the tables array has 4 objects, updating the array to 5 objects should also include the new view inside the scrollview. But that never updates. Any help would be appreciated.