swiftui

I found the answer after watching the WWDC talk on DataFlow through swiftUI. @Binding is used to pass read/write data from one view to the other. @Binding can never be 'The source of truth'. It is just a reference to a 'source of truth' that already exists.'Source of truth' is the original data that the view refers to (. To create a 'source of truth' with read-only acces you can use plain swift properties in the view struct. (Or use @Environment). If you need read/write access you have two options1) @State. You can use this option when the data you are using is completely local to the view (Such as your scroll position) which has no meening in your model2) BindableObject. Use this when you have data in your model that the view needs to read and write to.So @Binding is only a bridge that connects existing sources of data such as @State or @ObjectBinding. It can also access other Bindings as well.

With the new @FetchRequest property wrapper, core data fetches can occur directly in the view, per below forum discussion:https://forums.developer.apple.com/message/374407#374407SceneDelegate:import UIKit import SwiftUI class SceneDelegate: UIResponder, UIWindowSceneDelegate { var window: UIWindow? func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { let appDelegate = UIApplication.shared.delegate as! AppDelegate let context = appDelegate.persistentContainer.viewContext if let windowScene = scene as? UIWindowScene { let window = UIWindow(windowScene: windowScene) window.rootViewController = UIHostingController(rootView: ContentView().environment(.managedObjectContext, context)) self.window = window window.makeKeyAndVisible() } }ContentView:import SwiftUI import CoreData struct ContentView: View { @Environment(.managedObjectContext) var managedObjectContext @FetchRequest(fetchRequest: fetchRequest(), animation: nil) var pe

Could you explain what you are looking for ?Is it a general question about using AVPlayer in SwiftUI ?If so, may have a look here:https://stackoverflow.com/questions/57024870/swiftui-beta-5-how-to-properly-code-avplayer-after-loading-a-video-from-the-de

Dan - pls. try the SwiftUI forum.Ken

I'm extremely disappointed since I learned that SwiftUI is available from iOS13 only!This is ridiculous! I have many application that I'd like to renew, robust with this new programming structure but now I realise this will not happen. Sad.By disabling some iOS13 related properties e.g. color themes, sf icons and such they should allow us to compile SwiftUI for at least iOS10If they want to make Swift / SwiftUI best prog.lang. they have to consider this.Ever WWDC opening is starting with their billions of dollars budget information etc. so hire some developers for backward compatibility.Regards

Found what I guess one could call a fix. Instead of using VStacks, use Groups. Working code is below.import SwiftUI struct NavLink : View { var body: some View { NavigationView { List { Section (header: Text(Section Header 1).font(.headline)) { Group { HStack { NavigationLink(destination: Text(This will go to view 1.)) { Text(Text1: ) .bold() Text(More text 1) } } HStack { NavigationLink(destination: Text(This will go to view 2.)) { Text(Text2: ) .bold() Text(More text 2) } } } } Section (header: Text(Section Header 2).font(.headline)) { Group { HStack { NavigationLink(destination: Text(This will go to view 3.)) { Text(Text3: ) .bold() Text(More text 3) } } HStack { NavigationLink(destination: Text(This will go to view 4.)) { Text(Text4: ) .bold() Text(More text 4) } } } } } .navigationBarTitle(Text(NavLink Demo), displayMode: .automatic) .listStyle(GroupedListStyle()) } } } #if DEBUG struct NavLink_Previews : PreviewProvider { static var previews: some View { NavLink() } } #endif

With a big thank you to you, I can say that with the help from your example and a bit more digging, I was able to get mine to work. Here's the code below.import Foundation import SwiftUI import EventKitUI let eventStore = EKEventStore() struct EKEventWrapper: UIViewControllerRepresentable { typealias UIViewControllerType = EKEventEditViewController var theEvent = EKEvent.init(eventStore: eventStore) var coordinator = Coordinator() func makeUIViewController(context: UIViewControllerRepresentableContext<EKEventWrapper>) -> EKEventWrapper.UIViewControllerType { theEvent.startDate = Date() theEvent.endDate = Date() theEvent.title = The Main Event! let calendar = EKCalendar.init(for: .event, eventStore: eventStore) theEvent.calendar = calendar let controller = EKEventEditViewController() controller.event = theEvent controller.editViewDelegate = coordinator as EKEventEditViewDelegate return controller } func updateUIViewController(_ uiViewController: EKEventWrapper.UIViewControllerType, context: U