我正在尝试在Swift 4中使用可解码的方式解析JSON
JSON如下：
{
"_id": {
"$oid": "5afceaa0c1743f37b4ee1cf8"
},
"Con_id": "xxx",
"S_id": "xxx",
"I_Image": [
{
"$binary": {
"base64": "",
"subType": "00"
}
}
],
"T_Agreements": [
{
"Ag_Type": "xxx",
"Ap_Type": "xxx",
"Header": {
"Date": {
"$numberInt": "0"
},
"Company": "xxx",
"O_Code": "xxx",
"Lo": "xxx",
"Completed": true
},
"T_Particular": {
"C_Name": "NA",
"C_Address": "NA",
"C_Landline": "NA",
"ROC": "NA",
"T_Name": "xxx",
"Gender": "M",
"NR": "xxx",
"Dob": "22/08/1977",
"C_No": "xxx",
"T_Address": "xxx",
"S_No": "xxx",
"Sign": "NA",
"Proposed": "xxx",
"Completed": true
},
"D_Agreement": {
"C_Period": {
"P_Yr": {
"$numberInt": "2"
},
"P_Mth": {
"$numberInt": "0"
},
"From": {
"$numberInt": "0"
},
"To": {
"$numberInt": "0"
}
},
"First_Term": {
"R_A": {
"$numberInt": "800000"
},
"From_Date": {
"$numberInt": "0"
},
"To_Date": {
"$numberInt": "0"
}
},
"Second_Term": {
"R_A": "0",
"From_Date": {
"$numberInt": "0"
},
"To_Date": {
"$numberInt": "0"
}
},
"S_D": {
"$numberInt": "800"
},
"S_D_M": {
"$numberInt": "0"
},
"C_F": {
"$numberInt": "0"
},
"D_C_F": {
"$numberInt": "0"
},
"Maintenance_Fee": {
"$numberInt": "0"
},
"Others": {
"Description": "NA",
"O_F": {
"$numberInt": "0"
}
},
"D_C": "NA",
"Completed": true
},
"T_S": {
"$binary": {
"base64": "",
"subType": "00"
}
},
"L_Rep": {
"Name": "xxx",
"Rep_Sig": {
"$binary": {
"base64": "",
"subType": "00"
}
}
},
"Remarks": ""
}
],
"Supp": {
"B_N": "xxx",
"B_O_H": "12",
"C_B_O": "xxx",
"A_S": "Nil",
"F_T_Description": "xxx",
"C_T": "xxx",
"Completed": true
},
"FAdjustment": [
{
"Date": {
"$numberInt": "0"
},
"R_Increased": true,
"Pro_R": {
"$numberInt": "20066660"
},
"A_P_From": {
"$numberInt": "0"
},
"A_P_To": {
"$numberInt": "0"
},
"E_Date": {
"$numberInt": "0"
},
"A_Reason": "xxx",
"Req": {
"Name": "xxx",
"Des": "xxx",
"Sig": {
"$binary": {
"base64": "",
"subType": "00"
}
},
"Date": {
"$numberInt": "0"
}
},
"A1": {
"Name": "xxx",
"Des": "xxx",
"Sig": {
"$binary": {
"base64": "",
"subType": "00"
}
},
"Date": {
"$numberInt": "0"
}
},
"A2": {
"Name": "xxx",
"Designation": "xxx",
"Sig": {
"$binary": {
"base64": "",
"subType": "00"
}
},
"Date": {
"$numberInt": "0"
}
}
}
],
"Status": "xxx",
"Re": {
"Out": "0"
},
"Termination": {
"Terminated": false,
"Reason": "NA"
}
}
我可以使用Struct轻松解析诸如conID之类的内容：
struct Welcome: Codable {
let id: ID?
let conID, sID: String?
let iImage: [IImage]?
let tAgreements: [TAgreement]?
let supp: Supp?
let fAdjustment: [FAdjustment]?
let status: String?
let re: Re?
let termination: Termination?
enum CodingKeys: String, CodingKey {
case id = "_id"
case conID = "Con_id"
case sID = "S_id"
case iImage = "I_Image"
case tAgreements = "T_Agreements"
case supp = "Supp"
case fAdjustment = "FAdjustment"
case status = "Status"
case re = "Re"
case termination = "Termination"
}
}
struct FAdjustment: Codable {
let date: APFrom?
let rIncreased: Bool?
let proR, aPFrom, aPTo, eDate: APFrom?
let aReason: String?
let req, a1, a2: A1?
enum CodingKeys: String, CodingKey {
case date = "Date"
case rIncreased = "R_Increased"
case proR = "Pro_R"
case aPFrom = "A_P_From"
case aPTo = "A_P_To"
case eDate = "E_Date"
case aReason = "A_Reason"
case req = "Req"
case a1 = "A1"
case a2 = "A2"
}
}
struct A1: Codable {
let name, des: String?
let sig: IImage?
let date: APFrom?
let designation: String?
enum CodingKeys: String, CodingKey {
case name = "Name"
case des = "Des"
case sig = "Sig"
case date = "Date"
case designation = "Designation"
}
}
struct APFrom: Codable {
let numberInt: String?
enum CodingKeys: String, CodingKey {
case numberInt = "$numberInt"
}
}
struct IImage: Codable {
let binary: Binary?
enum CodingKeys: String, CodingKey {
case binary = "$binary"
}
}
struct Binary: Codable {
let base64, subType: String?
}
struct ID: Codable {
let oid: String?
enum CodingKeys: String, CodingKey {
case oid = "$oid"
}
}
struct Re: Codable {
let out: String?
enum CodingKeys: String, CodingKey {
case out = "Out"
}
}
struct Supp: Codable {
let bN, bOH, cBO, aS: String?
let fTDescription, cT: String?
let completed: Bool?
enum CodingKeys: String, CodingKey {
case bN = "B_N"
case bOH = "B_O_H"
case cBO = "C_B_O"
case aS = "A_S"
case fTDescription = "F_T_Description"
case cT = "C_T"
case completed = "Completed"
}
}
struct TAgreement: Codable {
let agType, apType: String?
let header: Header?
let tParticular: TParticular?
let dAgreement: DAgreement?
let tS: IImage?
let lRep: LRep?
let remarks: String?
enum CodingKeys: String, CodingKey {
case agType = "Ag_Type"
case apType = "Ap_Type"
case header = "Header"
case tParticular = "T_Particular"
case dAgreement = "D_Agreement"
case tS = "T_S"
case lRep = "L_Rep"
case remarks = "Remarks"
}
}
struct DAgreement: Codable {
let cPeriod: CPeriod?
let firstTerm: FirstTerm?
let secondTerm: SecondTerm?
let sD, sDM, cF, dCF: APFrom?
let maintenanceFee: APFrom?
let others: Others?
let dC: String?
let completed: Bool?
enum CodingKeys: String, CodingKey {
case cPeriod = "C_Period"
case firstTerm = "First_Term"
case secondTerm = "Second_Term"
case sD = "S_D"
case sDM = "S_D_M"
case cF = "C_F"
case dCF = "D_C_F"
case maintenanceFee = "Maintenance_Fee"
case others = "Others"
case dC = "D_C"
case completed = "Completed"
}
}
struct CPeriod: Codable {
let pYr, pMth, from, to: APFrom?
enum CodingKeys: String, CodingKey {
case pYr = "P_Yr"
case pMth = "P_Mth"
case from = "From"
case to = "To"
}
}
struct FirstTerm: Codable {
let rA, fromDate, toDate: APFrom?
enum CodingKeys: String, CodingKey {
case rA = "R_A"
case fromDate = "From_Date"
case toDate = "To_Date"
}
}
struct Others: Codable {
let description: String?
let oF: APFrom?
enum CodingKeys: String, CodingKey {
case description = "Description"
case oF = "O_F"
}
}
struct SecondTerm: Codable {
let rA: String?
let fromDate, toDate: APFrom?
enum CodingKeys: String, CodingKey {
case rA = "R_A"
case fromDate = "From_Date"
case toDate = "To_Date"
}
}
struct Header: Codable {
let date: APFrom?
let company, oCode, lo: String?
let completed: Bool?
enum CodingKeys: String, CodingKey {
case date = "Date"
case company = "Company"
case oCode = "O_Code"
case lo = "Lo"
case completed = "Completed"
}
}
struct LRep: Codable {
let name: String?
let repSig: IImage?
enum CodingKeys: String, CodingKey {
case name = "Name"
case repSig = "Rep_Sig"
}
}
struct TParticular: Codable {
let cName, cAddress, cLandline, roc: String?
let tName, gender, nr, dob: String?
let cNo, tAddress, sNo, sign: String?
let proposed: String?
let completed: Bool?
enum CodingKeys: String, CodingKey {
case cName = "C_Name"
case cAddress = "C_Address"
case cLandline = "C_Landline"
case roc = "ROC"
case tName = "T_Name"
case gender = "Gender"
case nr = "NR"
case dob = "Dob"
case cNo = "C_No"
case tAddress = "T_Address"
case sNo = "S_No"
case sign = "Sign"
case proposed = "Proposed"
case completed = "Completed"
}
}
struct Termination: Codable {
let terminated: Bool?
let reason: String?
enum CodingKeys: String, CodingKey {
case terminated = "Terminated"
case reason = "Reason"
}
}
我正在努力把嵌套的东西拿出来。
如何从T_Agreements中获取诸如Ag_Type之类的东西，并从T_Particular中获取一切之类的东西？
我尝试过
let jsonUrlString = "URL REMOVED REFER TO JSON ABOVE"
guard let url = URL(string: jsonUrlString) else { return }
URLSession.shared.dataTask(with: url) { (data, response, err) in
guard let data = data else { return }
do {
let decoder = JSONDecoder()
let welcome = try! decoder.decode(Welcome.self, from: data)
let tagree = try! decoder.decode(TAgreement.self, from: data)
print(tagree) // This returns all the header inside T_Agreements but the values are all nil
print(tagree.tParticular.cAddress) // This returns nil too
}
}.resume()
非常感谢和赞赏
答案 0 :(得分：0)
第let welcome = try! decoder.decode(Welcome.self, from: data)行将json数据加载到Welcome数据模型中，该模型与json的结构匹配。尝试将相同的json数据重新加载到其他数据模型中（如您在下一行中所做的那样）将不起作用。您需要直接从创建的填充数据模型中提取数据。
要获得协议，您只需从welcome模型中获取数据：
let tagreements = welcome.tAgreements
要获取Ag_Type，请从tagreements的第一个元素中获取填充的数据：
let agType = tagreements[0].agType