SwiftUI Picker not changing selection value - swift

Question

The following picker isn't updating $selection. Regardless of what the Picker shows while running the app, selection.rawValue always returns 0.
What is preventing the Picker from updating the State variable selection?
import SwiftUI
struct OrderPicker: View {
let initialIndex: Int
#State private var selection: Index
enum Index: Int, CaseIterable, Identifiable {
case none = 0,
first = 1,
second = 2,
third = 3
var id: Self { self }
}
init(initialIndex: Int) {
self.initialIndex = initialIndex
_selection = State(initialValue: OrderPicker.Index(rawValue: initialIndex) ?? .none)
}
var body: some View {
Form {
Picker("Order in list", selection: $selection) {
ForEach(Index.allCases) { index in
Text(String(describing: index)).tag(index)
}
}
}
.frame(height: 116)
}
func getOrderIndex() -> Int {
let index = selection.rawValue
return index
}
}

Answer 1

Here is an approach for you:
struct ContentView: View {
#State private var selection: PickerType = PickerType.none
var body: some View {
OrderPicker(selection: $selection)
}
}
struct OrderPicker: View {
#Binding var selection: PickerType
var body: some View {
Form {
Picker("Order in list", selection: $selection) {
ForEach(PickerType.allCases, id: \.self) { item in
Text(item.rawValue)
}
}
.pickerStyle(WheelPickerStyle())
.onChange(of: selection, perform: { newValue in
print(newValue.rawValue, newValue.intValue)
})
}
}
}
enum PickerType: String, CaseIterable {
case none, first, second, third
var intValue: Int {
switch self {
case .none: return 0
case .first: return 1
case .second: return 2
case .third: return 3
}
}
}