I need help with the depreciated code

Question

Created Jun ’23

Replies 1

Boosts 0

Participants 2

This is the error that shows: "'init(destination:tag:selection🏷️ )' was deprecated in iOS 16.0: use NavigationLink(value🏷️ ) inside a List within a NavigationStack or NavigationSplitView"

I can't seem to get past these. Can anyone help me with this? Thank you a bunch!

import SwiftUI

struct FileView: View { @Environment(.presentationMode) var presentationMode

let forms = [
    "Natural Slope Evaluation Form",
    "Artificial Slope Evaluation Form",
    "Reinforced Slope Evaluation Form"
]

@State private var isFormSelected = false
@State private var selectedForm: String? = nil

var body: some View {
    NavigationView {
        VStack {
            List(forms, id: \.self) { form in
                NavigationLink(destination: formView(for: form), tag: form, selection: binding(for: form)) {
                    Text(form)
                }
            }
        }
    }
}

private func formView(for form: String) -> some View {
    if form == "Natural Slope Evaluation Form" {
        return AnyView(NaturalSlopeFormView())
    } else if form == "Artificial Slope Evaluation Form" {
        // Handle other form views
    } else if form == "Reinforced Slope Evaluation Form" {
        // Handle other form views
    }
    
    return AnyView(EmptyView())
}

private func binding(for form: String) -> Binding<String?> {
    Binding<String?>(
        get: { selectedForm },
        set: { newValue in
            if newValue != selectedForm {
                selectedForm = newValue
                isFormSelected = newValue != nil
            }
        }
    )
}

}

extension String: Identifiable { public var id: String { return self } }

struct FileView_Previews: PreviewProvider { static var previews: some View { FileView() } }

Answered by BabyJ in 757334022

Check out the Migrating to new navigation types article to see how SwiftUI's navigation APIs changed.

New in iOS 17 is a modifier that seems to be a replacement for the tag-selection navigation link behaviour: navigationDestination(item:destination:).

Something like this could work:

var body: some View {
    NavigationStack { // change here
        VStack {
            List(forms, id: \.self) { form in
                // use new navigation link with a value
                NavigationLink(value: form) {
                    Text(form)
                }
            }
            // add new modifier
            .navigationDestination(item: formBinding()) { form in
                formView(for: form)
            }
        }
    }
}

private var formBinding() -> Binding<String?> { // remove unused parameter
    Binding<String?>(
        get: { selectedForm },
        set: { newValue in
            if newValue != selectedForm {
                selectedForm = newValue
                isFormSelected = newValue != nil
            }
        }
    )
}

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Answer 1

BabyJ OP

Jun ’23

Accepted Answer

Check out the Migrating to new navigation types article to see how SwiftUI's navigation APIs changed.

New in iOS 17 is a modifier that seems to be a replacement for the tag-selection navigation link behaviour: navigationDestination(item:destination:).

Something like this could work:

var body: some View {
    NavigationStack { // change here
        VStack {
            List(forms, id: \.self) { form in
                // use new navigation link with a value
                NavigationLink(value: form) {
                    Text(form)
                }
            }
            // add new modifier
            .navigationDestination(item: formBinding()) { form in
                formView(for: form)
            }
        }
    }
}

private var formBinding() -> Binding<String?> { // remove unused parameter
    Binding<String?>(
        get: { selectedForm },
        set: { newValue in
            if newValue != selectedForm {
                selectedForm = newValue
                isFormSelected = newValue != nil
            }
        }
    )
}

1