swiftui - How to perform an action after NavigationLink is tapped?

Question

I have a Plus button in my first view. Looks like a FAB button. I want to hide it after I tap some step wrapped in NavigationLink. So far I have something like this:

ForEach(0 ..< 12) {item in
    NavigationLink(destination: TransactionsDetailsView()) {
        VStack {
            HStack(alignment: .top) {
                Text("List item")
            }
            .padding(EdgeInsets(top: 5, leading: 10, bottom: 5, trailing: 10))
            .foregroundColor(.black)
            Divider()
        }
    }
    .simultaneousGesture(TapGesture().onEnded{
        self.showPlusButton = false
    })
        .onAppear(){
            self.showPlusButton = true
    }
}

It works fine with single tap. But when I long press NavigationLink it doesn't work. How should I rewrite my code to include long press as well? Or maybe I should make it work different than using simultaneousGesture?

Answer 1

Yes, NavigationLink does not allow such simultaneous gestures (might be as designed, might be due to issue, whatever).

The behavior that you expect might be implemented as follows (of course if you need some chevron in the list item, you will need to add it manually)

import SwiftUI

struct TestSimultaneousGesture: View {
    @State var showPlusButton = false
    @State var currentTag: Int?
    var body: some View {

        NavigationView {
            List {
                ForEach(0 ..< 12) { item in
                    VStack {
                        HStack(alignment: .top) {
                            Text("List item")
                            NavigationLink(destination: Text("Details"), tag: item, selection: self.$currentTag) {
                                EmptyView()
                            }
                        }
                        .padding(EdgeInsets(top: 5, leading: 10, bottom: 5, trailing: 10))
                        .foregroundColor(.black)
                        Divider()
                    }
                    .simultaneousGesture(TapGesture().onEnded{
                        print("Got Tap")
                        self.currentTag = item
                        self.showPlusButton = false
                    })
                    .simultaneousGesture(LongPressGesture().onEnded{_ in
                        print("Got Long Press")
                        self.currentTag = item
                        self.showPlusButton = false
                    })
                    .onAppear(){
                        self.showPlusButton = true
                    }
                }
            }
        }
    }
}

struct TestSimultaneousGesture_Previews: PreviewProvider {
    static var previews: some View {
        TestSimultaneousGesture()
    }
}