Simple Binding example

gistfile1.swift

struct NameDisplayView: View {
    @State var name: String = "unknown"
    @State var showNameChange = false
    
    var body: some View {
        VStack {
            Text("Your name is \(name)")
            Divider()
            Button("Change") {
                self.showNameChange = true
            }
        }
        .sheet(isPresented: $showNameChange) {
            NameChangeView(text: self.$name)
        }
    }
}

struct NameChangeView: View {
    @Environment(\.presentationMode) var presentationMode
    @Binding var text: String
    
    var body: some View {
        TextField("Type Here", text: $text, onCommit: { self.presentationMode.wrappedValue.dismiss() })
        .textFieldStyle(RoundedBorderTextFieldStyle())
        .padding()
    }
}