json - 解码 JSON 时出错 - keyNotFound(CodingKeys

Question

我正在尝试通过网络解析 JSON 数据。下面你可以看到魔法发生的地方。

func getBookingsForDate(date: String, completionHandler: @escaping ([String:String]) -> Void ){

struct bookings: Codable {

    var bookieName : String
    var bookieNumber: String
    var booked: String
    var bookingTime: String

    private enum Codingkeys: String, CodingKey{

        case bookieName
        case bookieNumber
        case booked
        case bookingTime
    }
}

let params = ["date":date]

let urlString = "http://mscissorss.pythonanywhere.com/getBookings/"
Alamofire.request(urlString, method: .get, parameters: params).responseJSON {
    response in
    switch response.result {
    case .success(let JSON):

        let decoder = JSONDecoder()
        guard let _ = response.data else{
            return
        }
        do {
            let loginDetails = try decoder.decode(bookings.self, from: response.data!)
            print(loginDetails)
        } catch let err{
            print(err)
        }

        //let bookings = JSON as! NSDictionary
        //completionHandler(JSON)
        /*
        do {
            let decoder = JSONDecoder()
            let gitData = try decoder.decode(bookings.self, from: JSON)
            print(gitData.bookieName)

        } catch let err {
            print("Err", err)
        }
        */
        break
    case .failure(let error):
        print(error)
    }
}
}

根据代码，我收到以下错误消息:

keyNotFound(CodingKeys(stringValue: "bookieName", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \"bookieName\", intValue: nil) (\"bookieName\").", underlyingError: nil))

我得到的 JSON 响应如下所示:

{
    0 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "10:00";
    };
    1 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "10:30";
    };
    10 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "15:00";
    };
    11 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "15:30";
    };
    12 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "16:00";
    };
    13 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "16:30";
    };
    14 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "17:00";
    };
    15 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "17:30";
    };
    16 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "18:00";
    };
    2 =     {
        booked = false;
        bookieName = "";
        bookieNumber = "";
        bookingTime = "11:00";
    };
}

这是我第一次解码，所以如果你有答案，请尝试解释一下为什么我需要做出我需要的改变。

更新

将代码更改为@sh_khan 和@vadian 建议的代码后，它可以解析它，但是我在解析的对象中仍然遇到此错误:

["1": MagicS.(unknown context at 0x106932738).bookings(bookieName: "", bookieNumber: "", booked: "false", bookingTime: "10:30"), 
"0": MagicS.(unknown context at 0x106932738).bookings(bookieName: "", bookieNumber: "", booked: "false", bookingTime: "10:00"),

此外，如果我希望能够访问单个值，可以说第一个带有键 "0" -> bookieName 的项目。 ，我将如何使用 loginDetails 来做到这一点？

Answer 1

第一个 booked 是一个 Bool，如果您不重命名键，则不需要 private enum Codingkeys

struct Booking: Codable {

   let bookieName : String
   let bookieNumber: String
   let booked: Bool
   let bookingTime: String

}

第二次这样解码

let loginDetails = try decoder.decode([String:Booking].self, from: response.data!)