How to get any type array field from alamofire response? - swift

Question

I have such field in my json response:
"title": [2402, "Dr.", "Prof.", "Prof. Dr.", "HM"]
And I would like to parse it. I have my model class:
struct AppDataModel:Decodable {
...
let title = Dictionary<String,Any>()
enum CodingKeys: String,CodingKey{
case title
...
}
...
}
As you can see I tried to use Dictionary<String,Any>() for it. And also I thought about array of Any -> [Any] but I usually get such error:
Type 'AppDataModel' does not conform to protocol 'Decodable'
I think that I have to process it like an ordinary json. But I didn't find such data type in Swift, only dictionary. So, maybe someone knows how to process such response fields?

Answer 1

This is an example to decode a single key as heterogenous array
let jsonString = """
{"title": [2402, "Dr.", "Prof.", "Prof. Dr.", "HM"], "name":"Foo"}
"""
struct AppDataModel : Decodable {
let titles : [String]
let name : String
private enum CodingKeys: String, CodingKey { case title, name }
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: CodingKeys.self)
var titlesContainer = try container.nestedUnkeyedContainer(forKey: .title)
var titleArray = [String]()
let _ = try titlesContainer.decode(Int.self) // decode and drop the leading integer
while !titlesContainer.isAtEnd { // decode all following strings
titleArray.append(try titlesContainer.decode(String.self))
}
titles = titleArray
self.name = try container.decode(String.self, forKey: .name)
}
}
let data = Data(jsonString.utf8)
do {
let result = try JSONDecoder().decode(AppDataModel.self, from: data)
print(result)
} catch {
print(error)
}

Answer 2

struct AppDataModel: Codable {
let title: [Title]?
}
extension AppDataModel {
init(data: Data) throws {
self = try newJSONDecoder().decode(AppDataModel.self, from: data)
}
init(_ json: String, using encoding: String.Encoding = .utf8) throws {
guard let data = json.data(using: encoding) else {
throw NSError(domain: "JSONDecoding", code: 0, userInfo: nil)
}
try self.init(data: data)
}
init(fromURL url: URL) throws {
try self.init(data: try Data(contentsOf: url))
}
func with(
title: [Title]?? = nil
) -> AppDataModel {
return AppDataModel(
title: title ?? self.title
)
}
func jsonData() throws -> Data {
return try newJSONEncoder().encode(self)
}
func jsonString(encoding: String.Encoding = .utf8) throws -> String? {
return String(data: try self.jsonData(), encoding: encoding)
}
}
enum Title: Codable {
case integer(Int)
case string(String)
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
if let x = try? container.decode(Int.self) {
self = .integer(x)
return
}
if let x = try? container.decode(String.self) {
self = .string(x)
return
}
throw DecodingError.typeMismatch(Title.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Wrong type for Title"))
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
switch self {
case .integer(let x):
try container.encode(x)
case .string(let x):
try container.encode(x)
}
}
}
func newJSONDecoder() -> JSONDecoder {
let decoder = JSONDecoder()
if #available(iOS 10.0, OSX 10.12, tvOS 10.0, watchOS 3.0, *) {
decoder.dateDecodingStrategy = .iso8601
}
return decoder
}
func newJSONEncoder() -> JSONEncoder {
let encoder = JSONEncoder()
if #available(iOS 10.0, OSX 10.12, tvOS 10.0, watchOS 3.0, *) {
encoder.dateEncodingStrategy = .iso8601
}
return encoder
}
//use
do {
let appDataModel = try AppDataModel(json)
}
catch{
//handle error
}