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

Not really answering your question, but here's the right way to set up SegmentedControl (didn't want to post that code as a comment, because it looks ugly). Replace your ForEach version with the following code:

ForEach(0..

Tagging views with enumeration cases or even strings makes it behave inadequately – selection doesn't work.

You might also want to add the following after the SegmentedControl declaration to ensure that selection works:

Text("Value: \(SectionType.allCases[self.selection].rawValue)")

Full version of body:

var body: some View {
    VStack {
        SegmentedControl(selection: self.selection) {
            ForEach(0..

Regarding your question – I tried adding didSet observer to selection, but it crashes Xcode editor and generates "Segmentation fault: 11" error when trying to build.