Swift 中同一结构的多个实例

Question

在我的应用程序中，我有航班预订应用程序的详细信息。它有到达和出发数据。我为同一对象创建了两个模型。因此，为了将数据传递到我的视图模型中的 ui，我创建了同一模型的两个实例，一个用于到达，另一个用于出发。我在到达和出发时使用了相同的实例吗？这会是一个好的做法吗？我想为它们两个使用一个实例。我该怎么办，请大家帮忙。

型号

// MARK: - Arrival

struct FTTDepatureDetailsModel: Codable {
    let cityName, cityCode, country, airportName, terminal, scheduledTime, actualTime, aircraft, dateTime: String?

}

// Mock data for flight Depature details

struct MockDepatureData {
    static let sampleDepature = FTTDepatureDetailsModel(cityName: "Riyad", cityCode: "RUH", country: "Saudi Arabia", airportName: "King Khiladi International", terminal: "3", scheduledTime: "19:50", actualTime: "19:59", aircraft: "Airbus A320", dateTime: "7 Sept 2023 10.00 am")
}

// Mock data for flight arrival details
struct MockArrivalData {
    static let sampleArrival = FTTDepatureDetailsModel(cityName: "London", cityCode: "LHR", country: "United Kingdom", airportName: "London Heathrow Airport", terminal: "2", scheduledTime: "01:45", actualTime: "-", aircraft: "Airbus A320", dateTime: "7 Sept 2023 08.00 pm")
}

视图模型

final class FTTRoundTripLocationViewModel: ObservableObject {

    @Published var roundTripDepatureLocation: FTTDepatureDetailsModel?
    @Published var roundTripArrivalLocation: FTTDepatureDetailsModel?
    
    
    init(roundTripDepatureLocation: FTTDepatureDetailsModel, roundTripArrivalLocation: FTTDepatureDetailsModel) {
        self.roundTripDepatureLocation = roundTripDepatureLocation
        self.roundTripArrivalLocation = roundTripArrivalLocation
    }

查看

 struct FTTFlightRoundTripDetailsView: View {
    @Environment(\.presentationMode) var presentationMode
    @State var flightRoundTripDetailsVM: FTTRoundTripDetailsViewModel
    @State var flightRoundTripLocationVM: FTTRoundTripLocationViewModel
    @State var flightRoundAmenitiesViewModel: AircraftDetailsInfoViewViewModel

    }

Answer 1

当然，您的模型可以包含结构的两个实例。为什么不可以？

一个建议：您在出发和到达时都使用

FTTDepatureDetailsModel

。使用

FTTDepatureDetailsModel

结构来描述到达的航班是令人困惑的，并且会让所有在其余时间查看此代码的人感到困惑。 （包括从现在起 6 个月后的您。）重命名它

FTTFlightDetailsModel

。