Show hint view in LazyVGrid in SwiftUI - swiftui

Question

I have lots of button in a LazyVGrid in a ScrollView. I am trying to show a hint view just top of the button I clicked (as like keyboard popup). I don't know how do I catch the position of a ScrollView button. Besides need help to select suitable gesture to complete the task.
Graphical representation...
Here is my code:
struct ShowHint: View {
#State var isPressed: Bool = false
var columns: [GridItem] = Array(repeating: .init(.flexible()), count: 5)
var body: some View {
ZStack{
if isPressed {
ShowOnTopOfButton().zIndex(1)
}
ScrollView(showsIndicators: false) {
LazyVGrid(columns: columns, spacing: 30) {
ForEach(0..<500) { i in
Text("\(i)")
.padding(.vertical, 10)
.frame(maxWidth: .infinity)
.background(Color.red.opacity( isPressed ? 0.5 : 0.9))
.gesture(TapGesture()
//.onStart { _ in isPressed = true } //but there is no property like this!
.onEnded { _ in isPressed = !isPressed }
)
}
}
}
.padding(.top, 50)
.padding(.horizontal, 10)
}
}
}
struct ShowOnTopOfButton: View {
var theS: String = "A"
var body: some View {
VStack {
Text("\(theS)")
.padding(20)
.background(Color.blue)
}
}
}

Answer 1

Here is possible solution - the idea is to show hint view as overlay of tapped element.
Tested with Xcode 12 / iOS 14
struct ShowHint: View {
#State var pressed: Int = -1
var columns: [GridItem] = Array(repeating: .init(.flexible()), count: 5)
var body: some View {
ZStack{
ScrollView(showsIndicators: false) {
LazyVGrid(columns: columns, spacing: 30) {
ForEach(0..<500) { i in
Text("\(i)")
.padding(.vertical, 10)
.frame(maxWidth: .infinity)
.background(Color.red.opacity( pressed == i ? 0.5 : 0.9))
.gesture(TapGesture()
.onEnded { _ in pressed = pressed == i ? -1 : i }
)
.overlay(Group {
if pressed == i {
ShowOnTopOfButton()
.allowsHitTesting(false)
}}
)
}
}
}
.padding(.top, 50)
.padding(.horizontal, 10)
}
}
}