How to manage a nullable selection with SwiftUI Picker.

bubidevs-swiftui-picker.swift

import SwiftUI

struct Car: Identifiable, Hashable, Equatable {
    let id = UUID()
    let model: String
    let team: String
    
    static func cars() -> [Self] {
        [
            .init(model: "SF23", team: "Ferrari"),
            .init(model: "RB19", team: "RedBull"),
            .init(model: "W14", team: "Mercedes")
        ]
    }
    
    static func == (lhs: Self, rhs: Self) -> Bool {
        lhs.id == rhs.id
    }
}


struct PickerView: View {
    private let cars = Car.cars()
    @State var selectedCar: Car? = nil
    
    var body: some View {
        NavigationView {
            Form {
                Picker("Select a car", selection: $selectedCar) {
                    Text("").tag(nil as Car?)
                    ForEach(cars) { car in
                        Text("\(car.team) \(car.model)")
                            .tag(car as Car?)
                    }
                }                
            }
            .navigationTitle("F1 Cars")
        }
    }
}