I’ve created a simple example that’s crashing my previews.

The code below crashes when the text is tapped, with the error saying that it found nil when trying to force unwrap itemToShow.

This doesn’t make sense to me since the code assigns itemToShow to a non-nil value before showing the sheet with showSheet = true.

struct TestView: View {
    
    @State var showSheet = false
    @State var itemToShow: String? = nil
    
    var body: some View {
        Text("Show sheet")
            .onTapGesture {
                itemToShow = "Apple"
                showSheet = true
            }
            .sheet(isPresented: $showSheet) {
                Text(itemToShow!)
            }
    }
}

I’m guessing this has something to do with how SwiftUI updates views, but why is this error happening and what’s a possible fix?