Why does my SwiftUI app crash when navigating backwards after placing a `NavigationLink` inside of a `navigationBarItems` in a `NavigationView`?

Question

EDIT: This has been fixed in iOS 13.3!

Minimal reproducible example (Xcode 11.2 beta, this works in Xcode 11.1):

struct Parent: View {         


        

Answer 1

FWIW - The solutions above suggesting a hidden NavigationLink Hack is still the best workaround in iOS 13.3b3. I have also filed a FB7386339 for posterity's sake, and was closed similarly to other aforementioned FBs: "Potential fix identified - For a future OS update".

Fingers Crossed.

Answer 2

As a workaround, based on Chuck H's answer above, I've encapsulated the NavigationLink as a hidden element:

struct HiddenNavigationLink<Content: View>: View {
var destination: Content
@Binding var activateLink: Bool

var body: some View {
    NavigationLink(destination: destination, isActive: self.$activateLink) {
        EmptyView()
    }
    .frame(width: 0, height: 0)
    .disabled(true)
    .hidden()
}
}

Then you can use it within a NavigationView (which is crucial) and trigger it from a Button in a nav bar:

VStack {
    HiddenNavigationList(destination: SearchView(), activateLink: self.$searchActivated)
    ...
}
.navigationBarItems(trailing: 
    Button("Search") { self.searchActivated = true }
)

Wrap this in "//HACK" comments so when Apple fixes this you can replace it.

Answer 3

Based on the information that you guys provided and specially a comment that @Robert made about where the NavigationView is placed I have found a way to workaround the issue at least on my specific scenario.

In my case I had a TabView that was enclosed in a NavigationView like this:

struct ContentViewThatCrashes: View {
@State private var selection = 0

var body: some View {
    NavigationView{
        TabView(selection: $selection){
            NavigationLink(destination: NewView()){
                Text("First View")
                    .font(.title)
            }
            .tabItem {
                VStack {
                    Image("first")
                    Text("First")
                }
            }
            .tag(0)
            NavigationLink(destination: NewView()){
                Text("Second View")
                    .font(.title)
            }
            .tabItem {
                VStack {
                    Image("second")
                    Text("Second")
                }
            }
            .tag(1)
        }
    }
  }
}

This code crashes as everyone is reporting in iOS 13.2 and works in iOS 13.1. After some research I figured out a workaround to this situation.

Basically, I am moving the NavigationView to each screen separately on each tab like this:

struct ContentViewThatWorks: View {
@State private var selection = 0

var body: some View {
    TabView(selection: $selection){
        NavigationView{
            NavigationLink(destination: NewView()){
                Text("First View")
                    .font(.title)
            }
        }
        .tabItem {
            VStack {
                Image("first")
                Text("First")
            }
        }
        .tag(0)
        NavigationView{
            NavigationLink(destination: NewView()){
                Text("Second View")
                    .font(.title)
            }
        }
        .tabItem {
            VStack {
                Image("second")
                Text("Second")
            }
        }
        .tag(1)
    }
  }
}

Somehow goes against the SwiftUI premise of simplicity but it works on iOS 13.2.