How to decode some strange JSON data in Swift? - json

Question

My JSON file is like this:
> {
"skill_list": [
{
"Skill": 78
},
{
"Skill": 57
},
"None"
]
},
{
"skill_list": [
{
"Skill": 12
},
"None",
"None"
]
},
I don't know how to define a struct to this JSON data, and I don't want to
use SwiftyJSON package.
Is there a way to define a struct to decode this JSON data?
Just like
JSONDecoder().decode(MyStruct.self, from: data)
the whole JSON is like:
{
"armor": {
"param": [
{
"skill_list": [
{
"Skill": 56
},
{
"Skill": 4
},
"None",
"None",
"None"
]
},
{
"skill_list": [
{
"Skill": 103
},
"None",
"None",
"None",
"None"
]
}
]
}
}

Answer 1

finally i got this, the code is :
let myJson = """
{
"armor": {
"param": [
{
"skill_list": [
{
"Skill": 56
},
"None",
"None",
"None",
"None"
]
},
{
"skill_list": [
{
"Skill": 103
},
"None",
"None",
"None",
"None"
]
}
]
}
}
"""
struct Armor: Decodable {
var armor: ArmorClass
}
struct ArmorClass: Decodable {
var param: [ArmorInfo]
}
struct ArmorInfo: Decodable {
var skill_list: [MetadataType]
}
enum MetadataType: Codable {
case Skill(SkillType)
case string(String)
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
do {
self = try .Skill(container.decode(SkillType.self))
} catch DecodingError.typeMismatch {
do {
self = try .string(container.decode(String.self))
} catch DecodingError.typeMismatch {
throw DecodingError.typeMismatch(MetadataType.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Encoded payload not of an expected type"))
}
}
}
}
struct SkillType: Codable {
var Skill: Int
}
let jsonData = myJson.data(using: .utf8)!
let decodeData = try! JSONDecoder().decode(Armor.self, from: jsonData)
if case let MetadataType.Skill(value) = decodeData.armor.param[0].skill_list[0] {
print(value.Skill)
}
if case let MetadataType.string(value) = decodeData.armor.param[0].skill_list[1] {
print("String: \(value)")
}