SwiftUI call function on tab view navigation - swiftui

Question

I want to execute functions when the user switches tabs in a TabView. Strangely, I can't seem to do this with .simultaneousGesture. How can I execute functions on the event of the user switching tabs in a tab view?
Sample Code:
struct ContentView: View {
#State var selectedTab: Int = 0
var body: some View {
NavigationView {
TabView(selection: $selectedTab) {
Text("View One")
.tabItem {
Text("View One")
}
.simultaneousGesture(TapGesture().onEnded {
print("This isn't printing")
})
Text("View Two")
.tabItem {
Text("View Two")
}
.simultaneousGesture(TapGesture().onEnded {
print("This isn't printing")
})
Text("View Three")
.tabItem {
Text("View Three")
}
.simultaneousGesture(TapGesture().onEnded {
print("This isn't printing")
})
}
}
}
}
EDIT: Updated Code
struct ContentView: View {
#State var selectedTab: Int = 0
var body: some View {
NavigationView {
TabView(selection: $selectedTab) {
Text("View One")
.tabItem {
Text("View One")
}
Text("View Two")
.tabItem {
Text("View Two")
}
Text("View Three")
.tabItem {
Text("View Three")
}
}
}
.onReceive(Just(selectedTab)) { thing in
print("Tapped!!")
print("\(thing)")
}
}
}

Answer 1

Add a .tag modifier to each tab and use a custom Binding that does the work in the setter.
struct ContentView: View {
#State var selectedTab: Int = 0
var body: some View {
NavigationView {
TabView(selection: Binding(
get: { selectedTab },
set: {
selectedTab = $0
print("switched to tab \(selectedTab)")
}
)) {
Text("View One")
.tabItem { Text("1") }
.tag(1)
Text("View Two")
.tabItem { Text("2") }
.tag(2)
Text("View Three")
.tabItem { Text("3") }
.tag(3)
}
}
}
}