Trouble using #environmentObject and #StateObject - swiftui

Question

I am creating my first app and I am having trouble using #EnvironmentObject and #StateObject. When I run the simulator it opens my ContentView(). I am trying to get it to where it opens the MainView(), which has a tabView. And now the tabView is not showing my ContentView(). I am assuming I have the #EnvironmentObject and #StateObject in the wrong places. In my ContentView it shows a list and addButton. I am basically trying to have a program that is updated by the user by filling out a form.
Here is the Main Method
import SwiftUI
#main
struct Location_ScoutApp: App {
#StateObject var listViewModels: ListViewModel = ListViewModel()
var body: some Scene {
WindowGroup {
// MainView(){
ContentView()
.environmentObject(listViewModels)
//}
}
}
}
Here is my MainView.
import SwiftUI
struct MainView: View {
var body: some View {
TabView {
MapView()
.tabItem {
Label("Map", systemImage: "map.circle")
}
// this is where i am having trouble.
ContentView()
.tabItem {
Label("Explore", systemImage: "magnifyingglass")
}
ProfileView()
.tabItem {
Label("Profile", systemImage: "person.crop.circle")
}
}
}
}
struct MainView_Previews: PreviewProvider {
static var previews: some View {
MainView()
}
}
Here is my ContentView:
import SwiftUI
struct ContentView: View {
#EnvironmentObject var listViewModel: ListViewModel
var body: some View {
List {
ForEach(listViewModel.items) { item in
// this is where i am getting my new error.
ListRowView(item: item)
.onTapGesture {
listViewModel.updateItem(item: item)
}
}
}
.navigationTitle("Explore")
.navigationBarItems(
leading: EditButton(),
trailing:
NavigationLink("Add", destination: addALandmarkForm()))
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
NavigationView {
ContentView()
}
.environmentObject(ListViewModel())
}
}

Answer 1

Without a reproducible example, it's hard to debug. This code, however, which is based on yours, works fine. Perhaps you can find the difference between your implementation and mine:
struct Item : Identifiable {
var id = UUID()
var title : String
}
class ListViewModel: ObservableObject {
#Published var items : [Item] = [.init(title: "Test 1"),.init(title: "Test 2")]
}
#main
struct Location_ScoutApp: App {
#StateObject var listViewModels: ListViewModel = ListViewModel()
var body: some Scene {
WindowGroup {
MainView()
.environmentObject(listViewModels)
}
}
}
struct MainView: View {
var body: some View {
TabView {
Text("Map")
.tabItem {
Label("Map", systemImage: "map.circle")
}
ContentView()
.tabItem {
Label("Explore", systemImage: "magnifyingglass")
}
Text("profile")
.tabItem {
Label("Profile", systemImage: "person.crop.circle")
}
}
}
}
struct ContentView: View {
#EnvironmentObject var listViewModel: ListViewModel
var body: some View {
NavigationView {
List {
ForEach(listViewModel.items) { item in
Text(item.title)
}
}
.navigationTitle("Explore")
}
}
}