Для того, щоб вирішити вашу проблему, ви можете розділити свою RawServerResponse
реалізацію на кілька логічних частин (за допомогою Swift 5).
№1. Реалізуйте властивості та необхідні ключі кодування
import Foundation
struct RawServerResponse {
enum RootKeys: String, CodingKey {
case id, user, reviewCount = "reviews_count"
}
enum UserKeys: String, CodingKey {
case userName = "user_name", realInfo = "real_info"
}
enum RealInfoKeys: String, CodingKey {
case fullName = "full_name"
}
enum ReviewCountKeys: String, CodingKey {
case count
}
let id: Int
let userName: String
let fullName: String
let reviewCount: Int
}
№2. Встановіть стратегію декодування для id
властивості
extension RawServerResponse: Decodable {
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: RootKeys.self)
id = try container.decode(Int.self, forKey: .id)
}
}
№3. Встановіть стратегію декодування для userName
властивості
extension RawServerResponse: Decodable {
init(from decoder: Decoder) throws {
let userContainer = try container.nestedContainer(keyedBy: UserKeys.self, forKey: .user)
userName = try userContainer.decode(String.self, forKey: .userName)
}
}
No4. Встановіть стратегію декодування для fullName
властивості
extension RawServerResponse: Decodable {
init(from decoder: Decoder) throws {
let realInfoKeysContainer = try userContainer.nestedContainer(keyedBy: RealInfoKeys.self, forKey: .realInfo)
fullName = try realInfoKeysContainer.decode(String.self, forKey: .fullName)
}
}
№5. Встановіть стратегію декодування для reviewCount
властивості
extension RawServerResponse: Decodable {
init(from decoder: Decoder) throws {
var reviewUnkeyedContainer = try container.nestedUnkeyedContainer(forKey: .reviewCount)
var reviewCountArray = [Int]()
while !reviewUnkeyedContainer.isAtEnd {
let reviewCountContainer = try reviewUnkeyedContainer.nestedContainer(keyedBy: ReviewCountKeys.self)
reviewCountArray.append(try reviewCountContainer.decode(Int.self, forKey: .count))
}
guard let reviewCount = reviewCountArray.first else {
throw DecodingError.dataCorrupted(DecodingError.Context(codingPath: container.codingPath + [RootKeys.reviewCount], debugDescription: "reviews_count cannot be empty"))
}
self.reviewCount = reviewCount
}
}
Повна реалізація
import Foundation
struct RawServerResponse {
enum RootKeys: String, CodingKey {
case id, user, reviewCount = "reviews_count"
}
enum UserKeys: String, CodingKey {
case userName = "user_name", realInfo = "real_info"
}
enum RealInfoKeys: String, CodingKey {
case fullName = "full_name"
}
enum ReviewCountKeys: String, CodingKey {
case count
}
let id: Int
let userName: String
let fullName: String
let reviewCount: Int
}
extension RawServerResponse: Decodable {
init(from decoder: Decoder) throws {
let container = try decoder.container(keyedBy: RootKeys.self)
id = try container.decode(Int.self, forKey: .id)
let userContainer = try container.nestedContainer(keyedBy: UserKeys.self, forKey: .user)
userName = try userContainer.decode(String.self, forKey: .userName)
let realInfoKeysContainer = try userContainer.nestedContainer(keyedBy: RealInfoKeys.self, forKey: .realInfo)
fullName = try realInfoKeysContainer.decode(String.self, forKey: .fullName)
var reviewUnkeyedContainer = try container.nestedUnkeyedContainer(forKey: .reviewCount)
var reviewCountArray = [Int]()
while !reviewUnkeyedContainer.isAtEnd {
let reviewCountContainer = try reviewUnkeyedContainer.nestedContainer(keyedBy: ReviewCountKeys.self)
reviewCountArray.append(try reviewCountContainer.decode(Int.self, forKey: .count))
}
guard let reviewCount = reviewCountArray.first else {
throw DecodingError.dataCorrupted(DecodingError.Context(codingPath: container.codingPath + [RootKeys.reviewCount], debugDescription: "reviews_count cannot be empty"))
}
self.reviewCount = reviewCount
}
}
Використання
let jsonString = """
{
"id": 1,
"user": {
"user_name": "Tester",
"real_info": {
"full_name":"Jon Doe"
}
},
"reviews_count": [
{
"count": 4
}
]
}
"""
let jsonData = jsonString.data(using: .utf8)!
let decoder = JSONDecoder()
let serverResponse = try! decoder.decode(RawServerResponse.self, from: jsonData)
dump(serverResponse)