No Observableobject of Type Carouselviewmodel Found. a View.Environmentobject(_:) for Carouselviewmodel May Be Missing as an Ancestor of This View

No ObservableObject of type CarouselViewModel found. A View.environmentObject(_:) for CarouselViewModel may be missing as an ancestor of this view

Wherever you instantiate the Home view, you have to add an .environmentObject modifier that passes an instance of CarouselViewModel to it.

I don't know what your exact code looks like (or what CarouselViewModel takes as parameters), but it'll look something like:

//somewhere in the parent view:
@StateObject private var model = CarouselViewModel() //if iOS 13, use @ObservedObject

//where you instantiate `Home`:
Home().environmentObject(model)

Note that this will also be an error if you try to use Home in a SwiftUI Preview and it doesn't have this .environmentObject code.

SwiftUI @EnvironmentObject error: may be missing as an ancestor of this view -- accessing object in the init()

The answer is that an Environment Object apparently cannot be accessed in an init() function. However, an ObservedObject can be. So I changed the code to this and it works. To make it easy I turned TState into a singleton that I could access anywhere. This could probably replace the use of @EnvironmentObject in many situations.

struct TEditorView: View {
    @ObservedObject private var tState = TState.shared
    //@EnvironmentObject private var tState: TState
    
    @State var name = ""
    
    init() {
        self._name = State(initialValue: tState.name)
    }
 
    var body: some View {
        ...
    }
}

SwiftUI if network not connected

Declaring an @EnvironmentObject in your SwiftUI view gets you a reference to an existing environment object but first, you have to create it and add it to the environment.

For code that could be accessed anywhere in your application, perhaps the best place for it is at the app layer. Assuming you're using the SwiftUI app lifecycle, it could look something like this:

struct MyApp: App {
  @StateObject private var monitor = Monitor()

  var body: some Scene {
    WindowGroup {
      ContentView()
        .environmentObject(monitor)
    }
  }
}

As long as your views are children of ContentView(), they'll then be able to access your Monitor instance via the @EnvironmentObject declaration.

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