List selection not changing value - ios

Question

I want to change a #State var variable whenever a row in a list is being selected. Similar to what didSelectRow does in UIKit. That means when tapping on "One" the text on the right-hand side should change from "Nothing selected" to "One".
Here's my current implementation. However, tapping on a row does nothing at all.
struct ContentView: View {
#State var items = [Item(id: 1, text: "One"), Item(id: 2, text: "Two"), Item(id: 3, text: "Three")]
#State var selectedItem: Item? = nil
var body: some View {
GeometryReader { geometry in
HStack(alignment: .center) {
List(items, selection: $selectedItem) { item in
Text(item.text)
}
.frame(width: geometry.size.width / 2.5, height: geometry.size.height)
.listStyle(InsetGroupedListStyle())
Text(selectedItem?.text ?? "Nothing selected")
}
}
}
}
struct Item: Identifiable, Hashable {
var id: Int
var text: String
}
How can I change the text when someone taps a row?

Answer 1

Selection in List works only if EditMode is in active state, so you need to handle it manually, something like
var body: some View {
GeometryReader { geometry in
HStack(alignment: .center) {
List(items) { item in
Text(item.text)
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
.contentShape(Rectangle())
.onTapGesture {
selectedItem = item
}
}
.frame(width: geometry.size.width / 2.5, height: geometry.size.height)
.listStyle(InsetGroupedListStyle())
Text(selectedItem?.text ?? "Nothing selected")
}
}
}
and if needed to highlight background than also do it manually.

Answer 2

You can use Button inside your List, and then select the Item in their action like this
List(items, id:\.self, selection: $selectedItem) { item in
Button(action: {
self.selectedItem = item
})
{
Text(item.text)
}
}