SwiftUI Menu - action when menu actually will open

Question

I have a Menu in my app, and I trigger haptic feedback when menu opens (from onTagGesture action).

However sometimes when I tap on the menu open trigger, the menu won't actually open, but I'm still getting haptic feedback. I want haptic only when menu actually will open.

Here's the code simplified code chunk:

Menu {
    Button("Menu button", action: someAction}}
} label: { 
    Text("Open menu") //in reality, this a more complicated view tapping on which should open the (context) menu
}
.onTagGesture {
  let generator = UIImpactFeedbackGenerator(style: .rigid)
  generator.impactOccurred()
}

So it is is pretty simple - tap on the Open menu trigger, tap gets registered, haptic is played back, and menu opens.

But as mentioned, for whatever reason, sometimes I press on the Open menu element, haptic plays back, but the actual menu won't open.

Whatever reasons for that are, I was wondering if there's any way at all to perform actions (such as the fore-mentioned haptic feedback), once menu has actually opened (or better yet, will actually open)? I tried to search wherever I could, and came up with nothing.

This is also important because menu opens on a long taps as well, that being iOS standard actions for opening menus. And even though I could add another separate handler for long taps (to provide haptics for both cases), this doesn't seems like a proper approach at all.

Combined with the fact that sometimes menu won't open, I definitely seem to need some other solution. Anyone can share any ideas? Is there some sort of onXXXXX handler I'm missing, that would fire when menu will open?

Thanks!

PS: To give more detail, I'm trying to implement this approach to menus described in Apple dev docs: https://developer.apple.com/documentation/swiftui/menu

As a part of the process I tried to attach onAppear handler to the whole menu, as well as to an individual element inside menu. Neither seems to be working.

Menu {
    Button("Open in Preview", action: openInPreview)
    Button("Save as PDF", action: saveAsPDF)
        .onAppear { doHaptic() } //only fires once, when menu opens, but not for subsequent appearances
} label: {
    Label("PDF", systemImage: "doc.fill")
}
.onAppear { doHaptic() } //doesn't really as it fires when the menu itself appears on the screen as a child of a parent view.

Answer 1

The following variant seems works (tested with Xcode 13.3 / iOS 15.4)

    Menu {
        Button("Open in Preview", action: {})
        Button("Save as PDF", action: {})
    } label: {
        Label("PDF", systemImage: "doc.fill")
    }
    .contentShape(Rectangle())
    .simultaneousGesture(TapGesture().onEnded {
        print(">> tapped")
    })

*but, pay attention that gesture is resolved not only when tap-to-open, but for tap-to-close as well.