I am trying to display a list of SwiftUI using UICollectionView, what I did is: using UICollectionViewCell to host the UIHostingController
when the cell willDisplay, I added the UIHostingController to parent view controller
remove it from parent controller when cell didEndDisplay
I notice sometimes, swiftUI only shows half or less half height of cell's height, when I scroll a cell outside screen back to screen, it made me feel the swiftUI is not rendered proper when it's outside screen.
code to host the UIHostingController:
class MyCell: UICollectionViewCell {
		private lazy var widgetHostingVC: UIHostingController<AnyView> = {
let vc = UIHostingController(rootView: AnyView(Text("")))
return vc
}()
		/* BTW, widgetHostingVC's view is added to contentView during init, with constraints edge to edge */
}
code to pass SwiftUIView to cell, called when cellForItemAt:indexPath::
func config(_ swiftUIView: AnyView) {
		self.widgetHostingVC.rootView = swiftUIView
}
code to add widgetHostingVC to parentVC, called when cell willDisplay:
func addViewControllerToParentVC(_ parentVC: UIViewController) {
		parentVC.addChild(self.widgetHostingVC)
		self.widgetHostingVC.didMove(toParent: parentVC)
		self.contentView.addSubview(self.widgetHostingVC.view)
		// setup constraints
}
code to remove widgetHostingVC from parentVC, call when cell didEndDisplaying:
func removeViewControllerFromParentVC() {
		self.widgetHostingVC.removeFromParent()
}
Anyone know what is the problem cause the swiftUI not render with correct height?
dibbleme
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I have read Widget Timelines With Clock-Based App - https://developer.apple.com/forums/thread/650293,
Keeping a Widget Up To Date - https://developer.apple.com/documentation/widgetkit/keeping-a-widget-up-to-date
WidgetKit won't request a new timeline at the end - https://developer.apple.com/forums/thread/653265
I learnt that
WidgetKit Extension is not alive whenever the widget is visible
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struct TestView: View {
var body: some View {
				Text("Hi").font(.system(size: 48))
		}
}
struct TestView_Previews: PreviewProvider {
static var previews: some View {
				TestView()
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		}
}
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row 2
row 3
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VStack {
		ForEach(records, id: \.id) { item in
				ZStack {
						// some views
				}
				.widgetURL(URL(string: "wig://\(item.id)"))
		}
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}
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