Model 不能'；t使用UUID（）解析Json名称

我有下一个解析模型

struct Unicards: Hashable, Codable, Identifiable {
var id: String?
var title: String?
var info: String?
var brand: String?
var model: String?
var make_year: Int?
var message: String?
var message_color: String?

我有一个Json文件，其中有许多重复的数组，具有不同的数据集，但具有相同的头，有时还有重复的ID

我想用

var uuid = UUID() 

为每个数据集生成唯一ID并使用唯一ID函数

list (model, id: \ .uuid)

但是当我添加这一行时，我得到了一个错误

   "Thread 1: Fatal error: Couldn't parse" Json name ""

我犯了什么错误，请告诉我

我已经看过很多答案了，但我不明白我到底错在哪里

尝试

及

---

错误的原因是，通过确认

Codable

协议，它试图合成值，当您添加一个不存在的值时，解码器会感到困惑。要解决这个问题，您只需将

CodingKeys

enum添加到结构中

struct Unicards: Hashable, Codable, Identifiable {

    var uuid: UUID = UUID()

    var id: String?
    var title: String?
    var info: String?
    var brand: String?
    var model: String?
    var make_year: Int?           // by convention this should be makeYear
    var message: String?
    var message_color: String?    // by convention this should be messageColor

    enum CodingKeys: String, CodingKey {
        case id
        case title
        case info
        case brand
        case model
        case message
        case make_year
        case message_color

        // if you use the usual naming convention, you could swap these out
        // case makeYear = "make_year",
        // case messageColor = "message_color"
    }

}

var uuid = UUID (). uuidString

struct Unicards: Hashable, Codable, Identifiable {

    var uuid: UUID = UUID()

    var id: String?
    var title: String?
    var info: String?
    var brand: String?
    var model: String?
    var make_year: Int?           // by convention this should be makeYear
    var message: String?
    var message_color: String?    // by convention this should be messageColor

    enum CodingKeys: String, CodingKey {
        case id
        case title
        case info
        case brand
        case model
        case message
        case make_year
        case message_color

        // if you use the usual naming convention, you could swap these out
        // case makeYear = "make_year",
        // case messageColor = "message_color"
    }

}