SwiftUI navigation link back button working in preview but not in simulator or device - ios

Question

Im trying to use a simple navigation view, with a navigation link to a different view. When running the app and the navigation link is pressed it takes me to the new view.
However when I'm on a simulator or device the back button dose not work, whereas on the preview it works fine.
Any ideas what the problem may be?
import SwiftUI
struct HomeView: View {
var body: some View {
NavigationView {
VStack {
NavigationLink(destination: Text("Detail View")) {
Text("Hello World")
}
}
.navigationBarTitle("SwiftUI")
}
}
}
struct HomeView_Previews: PreviewProvider {
static var previews: some View {
HomeView()
}
}
I think the problem may be caused by the fact that the HomeView is part of a tabView. The following code is from AppView.swift which is what is run when the app is run (You can see the code for that at the very bottom).
I think this is the problem because when the code bellow is commented out the app works fine.
HomeView()
.tabItem {
Image(systemName: "house.fill")
Text("Home")
}
.onTapGesture {
self.selectedTab = 2
}
.tag(2)
#main
struct Skate_AppApp: App {
var body: some Scene {
WindowGroup {
HomeView()
}
}
}

Answer 1

From your code I can tell that the problem is in onTapGesture, and I presume from self.selectedTab = 2 that you want to get which tab the user has selected.
Let's refactor your code a little bit with the same concept.
Solution: Delete onTapGesture and add onAppear.
TabView {
HomeView().tabItem {
Image(systemName: "house.fill")
Text("Home")
}.onAppear{
self.selectedTab = 2
}.tag(2)
AnotherView().tabItem {
Image(systemName: "car.fill")
Text("Login View")
}.onAppear{
self.selectedTab = 3
}.tag(3)
}
By this whenever a view appears, it means that the user has selected it, onAppear will be called, and your variable selectedTab will be changed. I hope this answer your question.