SwiftUI picker selection

Hello,

I am beginning with swift and I'm stuck with a picker issue.

I need to fill a JSON with the selected choice. And it keeps returning me the array.

Here is the Class:

Code Block Swift
class NewPatient: ObservableObject, Codable {
	enum CodingKeys: String, CodingKey {
        case lastName, firstName, age, phoneNumber, emailAddr = "email", address, streetNumber, street, typeStreetNumber, typeStreet
    }
    @Published var firstName: String = ""
    @Published var lastName: String = ""
    @Published var age: Int?
	static let typeStreetNbr = ["", "bis", "ter"]
    @Published var typeStreetNumber: String = ""
    @Published var indexStreetNbr = 0
    static let typeStrt = ["rue", "boulevard", "avenue", "chemin"]
    @Published var typeStreet: String = ""
    @Published var indexStreet = 0
   init() {    }
	required init(from decoder: Decoder) throws {
		lastName = try container.decode(String.self, forKey: .lastName)
		 firstName = try container.decode(String.self, forKey: .firstName)
		age = try container.decode(Int.self, forKey: .age)
		let address = try container.nestedContainer(keyedBy: CodingKeys.self, forKey: .address)
		typeStreetNumber = try address.decode(String.self, forKey: .typeStreetNumber)
		typeStreet = try address.decode(String.self, forKey: .typeStreet)
	}
	func encode(to encoder: Encoder) throws {
		var container = encoder.container(keyedBy: CodingKeys.self)
		try container.encode(firstName, forKey: .firstName)
		try container.encode(lastName, forKey: .lastName)
		try container.encode(age, forKey: .age)
		var address = container.nestedContainer(keyedBy: CodingKeys.self, forKey: .address)
		try address.encode(typeStreetNumber, forKey: .typeStreetNumber)
		try address.encode(typeStreet, forKey: .typeStreet)
	}
}

Here is the View code:

Code Block Swift
struct SignUpClient: View {
    @State private var backPressed: Bool = false
    var body: some View {
        if backPressed {
            return AnyView(PreSignUp())
        } else {
            return AnyView(SignUpClientView(backPressed: $backPressed, patient: NewPatient()))
        }
    }
}
struct SignUpClientView: View {
    @Binding var backPressed: Bool
    @State private var patientAddressInfo: Bool = false
    @ObservedObject var patient: NewPatient
	var body: some View {
	Form {
		Section {
			Picker("Street desc.", selection: $patient.indexStreet) {
				ForEach (0 ..< NewPatient.typeStrt.count) {
					Text(NewPatient.typeStrt[$0])
				}
			}.pickerStyle(SegmentedPickerStyle())
		}
	}
}

I would like to store ether assign e.g. typeStreet variable with the result of the picker selection or just return the selected one.

Thank you for your help,

P.

Code Block 
            return AnyView(SignUpClientView(backPressed: $backPressed, patient: NewPatient()))

Code Block 
struct SignUpClient: View {
    @State private var backPressed: Bool = false
    @StateObject var newPatient = NewPatient() //<- Keep the newly created instance in an `@StateObject`.
    
    var body: some View {
        VStack {
            Text("\(newPatient.indexStreet)")
            if backPressed {
                PreSignUp()
            } else {
                SignUpClientView(backPressed: $backPressed, patient: newPatient)
            }
        }
    }
}