Swift Parsing with Json - json

Question

I'm trying to parsing Json using swift and this is the json I get
{"Data":{"KanBan":[{"Sdate":"2020/06/22","Stype":"上班卡","Stime":"09:31:11","Ip":"xxx.xxx.xxx.xx"},{"Sdate":"2020/06/20","Stype":"下班卡","Stime":"20:53:43","Ip":"xxx.xxx.xxx.xx"},{"Sdate":"2020/06/20","Stype":"下班卡","Stime":"20:48:25","Ip":"xxx.xxx.xxx.xx"},{"Sdate":"2020/06/20","Stype":"下班卡","Stime":"18:53:57","Ip":"xxx.xxx.xxx.xx"},{"Sdate":"2020/06/20","Stype":"上班卡","Stime":"18:43:54","Ip":"xxx.xxx.xxx.xx "}]},"IsSuccess":true,"Message":null,"ErrorCode":null,"ErrorMessage":null}
Below is the struct I defined and use it with Swift JsonDecoder :
// inside viewController
let decoder = JSONDecoder()
let historys = try decoder.decode([Datas].self, from: data)
// struct I defined myself
struct Datas : Codable {
let Data: KanBan
let IsSuccess: Bool
let Message: String
let ErrorCode: String
let ErrorMessage: String
init( Data: KanBan, IsSuccess: Bool, Message: String, ErrorCode: String, ErrorMessage: String) {
self.Data = Data
self.IsSuccess = IsSuccess
self.Message = Message
self.ErrorCode = ErrorCode
self.ErrorMessage = ErrorMessage
}
}
struct KanBan : Codable {
let KanBan: [details]
init( kanbans : [details]) {
self.KanBan = kanbans
}
}
struct details: Codable {
let Sdate: Date
let Stype: String
let Stime : String
let Ip: String
init(Sdate: Date, Stype: String, Stime : String, Ip: String ) {
self.Sdate = Sdate
self.Stype = Stype
self.Stime = Stime
self.Ip = Ip
}
}
I keep get error that said parsing failed .
Whats wrong with the struct I defined ? Plz help and thanks!!!

Answer 1

You need to fix 3 things:
You're trying to decode [Datas] whereas it should be Datas.
If the keys are optional you should declare them as optional. eg: ErrorMessage, ErrorCode.
Provide the DateFormatter if you're trying to decode Dates.
Here's the code you need: -
Model:
struct Datas: Codable {
let Data: KanBan
let IsSuccess: Bool
let Message: String?
let ErrorCode: String?
let ErrorMessage: String?
}
struct KanBan: Codable {
let KanBan: [details]
}
struct details: Codable {
let Sdate: Date
let Stype: String
let Stime : String
let Ip: String
}
Decoding:
do {
let decoder = JSONDecoder()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy/MM/dd"
decoder.dateDecodingStrategy = .formatted(dateFormatter)
let historys = try decoder.decode(Datas.self, from: data)
print(historys)
} catch { print(error) }