ios - TabView (SwiftUI): Respond onTab on an already active tabItem

Question

I have a ContentView.swift which contains a TabView.

View1 has a NavigationView in it with some childViews. View2 is just a single View.

I would like to perform some action (always return to View1, even when being in a childView of View1), when the first tabItem is pressed. Even if it is already the active tabItem.

I tried onTapGesture as seen below, which didn't seem to do anything. Adding it right before ".tag(0)" didn't change anything, either:

                            TabView {
                            View1()
                                .onTapGesture {
                                    print("Test")
                            }
                                .tabItem {
                                    Image(systemName: "doc.plaintext")
                                        .font(.system(size: 25))
                                    Text("View1")
                            }.tag(0)

                            View2()
                                .tabItem {
                                    Image(systemName: "person.crop.circle")
                                        .font(.system(size: 25))
                                    Text("View2")
                            }.tag(1)

Answer 1

Here is possible approach. Tested with Xcode 11.4 / iOS 13.4

struct TestTabSelectionAction: View {
    @State private var selectedTab = 0

    var body: some View {
        let selection = Binding<Int>(
            get: { self.selectedTab },
            set: { self.selectedTab = $0
                print("Pressed tab: ($0)")
                if $0 == 0 {
                           // <<< your action here !!
                }
        })

        return TabView(selection: selection) {
            View1()
            .tabItem {
                Image(systemName: "doc.plaintext")
                    .font(.system(size: 25))
                Text("View1")
            }.tag(0)

            View2()
                .tabItem {
                    Image(systemName: "person.crop.circle")
                        .font(.system(size: 25))
                    Text("View2")
            }.tag(1)
        }
    }
}