Simple master screen with list, NavigationLink to editable detail view.
I want edits on the detail screen to update to the master list "cars" variable and the list UI.
On the detail view, if I edit one field and exit the field, the value reverts to the original value. Why?
If I edit one field, don't change focus and hit the back button. The master list updates. This is what I want, but I can only update 1 field because of problem #1. Should be able to edit all the fields.
If I implement the == func in the Car struct, then no updates get saved. Why?
struct Car: Hashable, Equatable {
var id: UUID = UUID()
var make: String
var model: String
var year: Int
// static func == (lhs: Car, rhs: Car) -> Bool {
// return lhs.id == rhs.id
// }
}
struct ContentView: View {
@State private var cars: [Car]
init() {
cars = [
Car(make: "Toyota", model: "Camry", year: 2020),
Car(make: "Honda", model: "Civic", year: 2021),
Car(make: "Ford", model: "Mustang", year: 2022),
Car(make: "Chevrolet", model: "Malibu", year: 2023),
Car(make: "Nissan", model: "Altima", year: 2024),
Car(make: "Kia", model: "Soul", year: 2025),
Car(make: "Volkswagen", model: "Jetta", year: 2026)
]
}
var body: some View {
NavigationStack {
VStack {
ForEach($cars, id: \.self) { $car in
NavigationLink(destination: CarDetailView(car: $car)){
Text(car.make)
}
}
}
}
}
}
struct CarDetailView: View {
@Binding var car: Car
var body: some View {
Form {
TextField("Make", text: $car.make)
TextField("Model", text: $car.model)
TextField("Year", value: $car.year, format: .number)
}
}
}
