Search Results

Hi everyone, When I add WatchOS as a target to my multi platform SwiftUI project, it creates its own ContentView within the Watchkit Extension folder. It does not seem to be able to access any views within the "Shared" folder in the multi platform App template, leaving me with two Content Views in the project. Does anyone know how to add a WatchOS target and have it use the shared files? Can this be done? I was encouraged because the App Essentials WWDC20 video implies WatchOS can be used with this template as they have a screenshot example, but so far haven't had success in duplicating it.

Has anyone had success getting the .onDeleteCommand() modifier to work with a List? .Delete() seems to be working fine, and enables swipe-to-delete on any platform, and I figured the onDeleteCommand modifier was the key to enabling the Edit > Delete menu on macOS, but no matter where I put the modifier in my view the Edit > Delete command remains disabled.

As a long-time Obj-C dev (since iPhone OS 2) I decided that SwiftUI was the nudge to use Swift! ¯\&#92;&#95;(ツ)_/¯ Thus, I am still trying to understand how a language can be so type-vague in code, and so type-pedantic in the compiler!!! Pulling my hair out trying to get Swift/SwiftUI to instantiate a UIHostingController<>, for use with CoreData class MyCoreDataHostingController : UIHostingController<MyCoreDataView> { required init?(coder: NSCoder) {//Instantiate From Storyboard let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext let contentView = MyCoreDataView().environment(\.managedObjectContext, context) super.init(coder: coder, rootView: contentView) //Cannot convert value of type 'some View' to expected argument type 'MyCoreDataView' } } struct MyCoreDataView: View { var body: some View { Text("Core Data View") } } How can I FORCE Swift to INFER the correct/appropriate type? What I have tried so far. 5 let contentView = MyCoreDataView() Compiles/runs, but does not include CoreData. 6 super.init(coder: coder, rootView: contentView as! MyCoreDataView) Compiles, but crashes at instantiation. Could not cast value of type 'SwiftUI.ModifiedContent<MyHostingController.MyCoreDataView, SwiftUI.EnvironmentKeyWritingModifier<_C.NSManagedObjectContext>>' (...) to 'MyHostingController.MyCoreDataView' (...). ... or is this simply not possible? (yet)

WWDC2020 videos said SwiftUI on Xcode12 can create and manage different scenes in an App, but we do not find out any API could do that. We try the method  of SwiftUI on Xcode11 to create new Window on Xcode 12 : UIApplication.shared.requestSceneSessionActivation(nil, userActivity: nil, options: nil, errorHandler: nil) }) But it does not work as we expect. The code create a window of the same scene. If we set a different userActivity, SwiftUI have no method to set SceneDelegate.swift. It only has @UIApplicationDelegateAdaptor to set AppDelegate.  So, I Wonder whether there is a convenient way to create a new Scene by new SwiftUI APIs. The following code can only create Scenes with the same content view : @main struct test: App {       let newWindowPublisher = NotificationCenter.default.publisher(for: Notification.Name("anotherScene"))       var body: some Scene {             WindowGroup {                    ContentView()                          .onReceive(newWindowPublish, perform: { info in                             UIApplication.shared.requestSceneSessionActivation(nil, userActivity: nil, options: nil, errorHandler: nil) })             }        } }

With the recent changes to allow for an app to be completely in SwiftUI, I am trying to re-create a simple core data and SwiftUI app. How can a NSPresistantContainer be setup with the new app delegate adaptor and scene builder? I have attempted what has worked previously by creating a lazy var in the app delegate and then providing that as an adaptor on the app struct. What is the correct way to setup the NSPresistantContainer so the NSManagedObjectModel is loaded? class AppDelegate: NSObject, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { if isDataSet() == false { setDefaultData() } return true } lazy var persistentContainer: NSPersistentContainer = {     let container = NSPersistentContainer(name: "breakapp")     container.loadPersistentStores(completionHandler: { (storeDescription, error) in         if let error = error as NSError? {             fatalError("Unresolved error \(error), \(error.userInfo)")         }     })     return container }() func saveContext () {     let context = persistentContainer.viewContext     if context.hasChanges {         do {             try context.save()         } catch {             let nserror = error as NSError             fatalError("Unresolved error \(nserror), \(nserror.userInfo)")         }     } } func setDefaultData() { guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else { return } let managedContext = appDelegate.persistentContainer.viewContext for (i, weekday) in Constants.CoreData.weekdays.enumerated() { let user = NSManagedObject(entity: Weekday.entity(), insertInto: managedContext) user.setValue("\(weekday)", forKey: Constants.CoreData.Attributes.label) user.setValue(i, forKey: Constants.CoreData.Attributes.sortNumber) } try? managedContext.save() } func isDataSet() -> Bool { guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else { return true } let managedContext = appDelegate.persistentContainer.viewContext let fetchRequest = NSFetchRequest&lt;NSFetchRequestResult&gt;(entityName: Constants.CoreData.Entities.weekday) let result = try? managedContext.fetch(fetchRequest) return result?.count != 0 } } @main struct TakeABreakApp: App { @UIApplicationDelegateAdaptor private var appDelegate: AppDelegate @Environment(\.scenePhase) private var scenePhase     var body: some Scene {         WindowGroup {             ContentView()         }     } } struct TakeABreakApp_Previews: PreviewProvider { static var previews: some View { ContentView() } }

In the old SwiftUI app initialization there was UIApplicationDelegate and UIWindowSceneDelegate. I was handling a URL callback in the SceneDelegate using the method: func scene(_ scene: UIScene, openURLContexts URLContexts: Set&lt;UIOpenURLContext&gt;) However in the new app initialization there is no SceneDelegate, nor an appropriate property like there is UIApplicationDelegateAdaptor for UIApplicationDelegate I tried using the method but it is not called. func application( _ application: UIApplication, open url: URL, options: [UIApplication.OpenURLOptionsKey : Any] = [:] ) -> Bool So my question is, how do I handle a callback url in the new app setup?