How can I run an action when a state changes?

Question

enum SectionType: String, CaseIterable {
    case top = \"Top\"
    case best = \"Best\"
}

struct ContentView : View {
    @State private var selection: Int = 0

           


        

Answer 1

In iOS 14 there is now a onChange modifier you can use like so:

SegmentedControl(selection: $selection) {
    ForEach(SectionType.allCases.identified(by: \.self)) { type in
        Text(type.rawValue).tag(type)
    }
}
.onChange(of: selection) { value in
    print("Selection changed to \(selection)")
}