Prevent a view from popping off in a NavigationView

Question

I have a SwiftUI View that pushes a new detail view using a regular NavigationLink:

NavigationLink(destination: DetailView() ) { Text("Show Detail View") }

I need a workaround to prevent the detail view from popping when the user presses the back button. I couldn't find a SwiftUI native way to do that.

That will be confusing for user, don't you want just hide back button with navigationBarBackButtonHidden? And that's it: no back button - no back navigation. — Asperi
– Asperi, Commented Mar 8, 2020 at 11:04
I need to display a message to the user in a specific case and prevent the pop, and in other cases i need the popping to work as is. — JAHelia
– JAHelia, Commented Mar 8, 2020 at 11:05
What about custom back button as leading navigation bar item? You'd have full control over action in there. — Asperi
– Asperi, Commented Mar 8, 2020 at 11:06

Asperi · Accepted Answer · 2020-03-08 11:32:57Z

Please find below a possible approach using custom back button (note: adding any leading navigation bar item disables default back button automatically)

Tested with Xcode 11.2 / iOS 13.2

struct DemoDetailsWithCustomBack: View { @Environment(\.presentationMode) var presentationMode @State private var allowsBack = true var body: some View { Text("Details here") .navigationBarItems( leading: Button(action: { if self.allowsBack { self.presentationMode.wrappedValue.dismiss() } else { // activate alert here } }, label: { Image(systemName: "chevron.left") }) ) } } struct TestNavBarButton_Previews: PreviewProvider { static var previews: some View { NavigationView { NavigationLink(destination: DemoDetailsWithCustomBack() ) { Text("Show Detail View") } } } }

Collectives™ on Stack Overflow

Prevent a view from popping off in a NavigationView

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related