Building Lists & Navigation: Extra argument 'id' in call

Did you copy the exact code:

struct LandmarkList: View {
    var body: some View {
        NavigationView {
            List(landmarkData) { landmark in
                NavigationLink(destination: LandmarkDetail(landmark: landmark)) {
                    LandmarkRow(landmark: landmark)
                }
            }
            .navigationBarTitle(Text("Landmarks"))
        }
    }
}

struct LandmarkList_Previews: PreviewProvider {
    static var previews: some View {
        ForEach(["iPhone SE", "iPhone XS Max"], id: \.self) { deviceName in
            LandmarkList()
                .previewDevice(PreviewDevice(rawValue: deviceName))
        }
    }

If yes, did you try removing the id argument ?

SwiftUI is evolving between each version of XCode and doc may not be updated.

Does autocompletion propose you some signature for ForEach ?

1. Yes, that's the code I have.
2. If I remove the id, I get this error message.
   1. Cannot convert value of type '(String) -> _ModifiedContent<LandmarkList, _TraitWritingModifier<PreviewDevice?>>' to expected argument type '(_) -> _'
3. ForEach autocompletes to this

   1. ForEach(<#T##data: _##_#>, content: <#T##(_.Element.IdentifiedValue) -> _#>)

4. I am using XCode Version 11.0 beta 3 (11M362v)

So just try replacing by

       ForEach(["iPhone SE", "iPhone XS Max"], content: \.self) { deviceName in

But the safest would probably to upgrade to beta 5 (things are moving a lot in SwiftUI).

Upgrade to Beta 5 works. Leave it as id. Do not change to content.

Thanks Claude31.

The below line worked. Using .identified(by: ) helped me to get rid of the error

ForEach([“iPhone SE”, “iPhone XS Max”].identified(by: \.self)) { deviceName in