Change the content of a View from UISceneDelegate - swiftui

Question

I have the following view.
struct ContentView: View {
#State var data = "Intitial Value"
var body: some View {
VStack {
Text(data)
Button(action: { self.data="Changed value" }) {
Text("Click Here")
}
}
}
}
This simple code works fine, whenever I click the button the data property it reflects on the screen label.
Now I want to change the text label whenever I receive an URL and the following code doesn't work.
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
guard let vc = self.window?.rootViewController as? UIHostingController<ContentView> else {
return
}
vc.rootView.data = "Scene Delegate"
}

Answer 1

You can do this using model view injected via EnvironmentObject
class DataViewModel: ObservableObject {
#Published var data = "Intitial Value"
}
struct ContentView: View {
#EnvironmentObject var vm: DataViewModel // < declare
var body: some View {
VStack {
Text(vm.data) // < use
Button(action: {
self.vm.data="Changed value" // < use
}) {
Text("Click Here")
}
}
}
}
and in SceneDelegate, have this as member
class SceneDelegate {
var dataVM = DataViewModel() // << create
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
...
let contentView = ContentView()
.environmentObject(dataVM) // << inject
window?.rootViewController = UIHostingController(rootView: contentView)
...
}
func scene(_ scene: UIScene, openURLContexts URLContexts: Set<UIOpenURLContext>) {
dataVM.data = "Scene Delegate" // << modify
}
...