How to change variable when I slide on TabView in swift - arrays

Question

I've following code for my TabView:
struct CardList: View {
var body: some View {
TabView {
ForEach (0..<100 ){ item in
CardViewNew()
}
}
.tabViewStyle(PageTabViewStyle())
.padding(.vertical, 10)
}
}
Every time when I slide to the next view of my TabView the following variable "i" should increased by 1 to show the next element of my array "shuffled_questions".
struct CardViewNew: View {
var body: some View {
Text(shuffled_questions[i])
}
}
Would be nice I've someone can help me :)

Answer 1

Seems like there's two ways to accomplish this. To answer your original question, you could use the selection binding of TabView to get a variable to change when the TabView moves:
#State private var tabSelection = 0
var body: some View {
TabView(selection: $tabSelection) {
ForEach (0..<100 ){ item in
Text("hi")
}
}
.tabViewStyle(PageTabViewStyle())
.padding(.vertical, 10)
Text("\(tabSelection)")
}
However, it seems like in your case it seems like you may just want to pass the index from your ForEach as a parameter to your CardViewNew:
struct ContentView : View {
var body: some View {
TabView {
ForEach (0..<100 ){ item in
CardViewNew(index: item)
}
}
.tabViewStyle(PageTabViewStyle())
.padding(.vertical, 10)
}
}
struct CardViewNew: View {
var index: Int
var body: some View {
Text(shuffled_questions[index])
}
}