How do you pass data between a sheet and the parent view?

Answer: Use @Binding to pass a two-way connection into the sheet, so changes inside the sheet reflect in the parent.

Code Example:

struct ParentView: View {
    @State private var isSheetPresented = false
    @State private var selectedColor = "Red"

    var body: some View {
        VStack {
            Text("Selected: \(selectedColor)")
            Button("Open Sheet") { isSheetPresented = true }
        }
        .sheet(isPresented: $isSheetPresented) {
            ColorPickerSheet(selectedColor: $selectedColor)
        }
    }
}

struct ColorPickerSheet: View {
    @Binding var selectedColor: String
    @Environment(\.dismiss) var dismiss

    var body: some View {
        VStack {
            ForEach(["Red", "Green", "Blue"], id: \.self) { color in
                Button(color) {
                    selectedColor = color  // updates parent
                    dismiss()
                }
            }
        }
    }
}