navViewModel not persisted

[danielbuechele]

This might be due to my limited knowledge of SwiftUI or a flaw in my app. However, it happens that NavigationStackView is re-initialized for rerendering and because navViewModel is created in the constructor, it forgets its state.

Marking it is a @StateObject fixes the problem for me, but this method is only available starting iOS 14, so I'm not sure if that's what you want for this library.

And as I mentioned, perhaps NavigationStackView shouldn't be reinitialized at all, but that seems to be a problem with either SwiftUI or my app.

[danielbuechele]

What also solves the problem for me is to wrap NavigationStackView in its own component:

public struct Navigation<Content: View>: View {
    let content: Content

    init(@ViewBuilder content: () -> Content) {
        self.content = content()
    }
    
    public var body: some View {
        NavigationStackView {
            content
        }
    }
}

[matteopuc]

Hi @danielbuechele, sorry for the late response. In order for me to help you understanding why the NavigationStackView gets recreated I'd need to take a look at your code (at least a part of your code that can reproduce the issue). Just a question: where do you create your NavigationStackView? Usually you want to create it as the very first view of your app.