JSON解码器类型不匹配错误 [英] JSON Decoder Type Mismatch Error
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问题描述
我想使用可解码的语法来解析JSON,但出现类似以下错误类型的错误匹配:
I want to parse JSON using decodable, but I get an error type mismatch like:
Swift.DecodingError.Context(codingPath:[],debugDescription:预期用于解码Array,但找到了字典."
Swift.DecodingError.Context(codingPath: [], debugDescription: "Expected to decode Array but found a dictionary instead."
我的JSON:
{
"code": 0,
"data": {
"_id": "string",
"title": "string",
"images": [
"string"
],
"shortDesc": "string",
"desc": "string",
"price": 0,
"discountPrice": 0,
"quantity": 0,
"category": {
"name": "string",
"val": "string"
},
"brand": {
"name": "string",
"val": "string"
},
"variants": [
{
"name": "string",
"value": "string",
"quantity": 0,
"variantCode": "string"
}
],
"stockCode": "string",
"updatedDate": "2018-06-05T14:04:51.226Z",
"status": true,
"isDeleted": true,
"isNew": true,
"freeCargo": true,
"createDate": "2018-06-05T14:04:51.226Z",
"note1": "string",
"note2": "string",
"note3": "string",
"shop": {
"name": "string",
"val": "string"
}
},
"error": "string"
}
我的模型:
struct ProductDetail : Decodable {
let code : Int = 0
let error : String = ""
var data : NestedData? = nil
}
嵌套数据:
struct NestedData : Decodable{
let _id : String = ""
let title : String = ""
let images : [String] = []
let shortDesc : String = ""
let desc : String = ""
let price : Int = 0
let discountPrice : Int = 0
let quantity : Int = 0
let updatedDate : String = ""
let status : Bool = false
let isDeleted : Bool = false
let isNew : Bool = false
let freeCargo : Bool = false
let createDate : String = ""
let note1: String = ""
let note2: String = ""
let note3: String = ""
let variants : [variants]? = nil
let brand : brand? = nil
let category :category? = nil
let shop : shop? = nil
}
对象:
struct variants : Decodable{
let name : String
let val : String
let quantity : Int
let variantCode : String
}
struct brand : Decodable{
let name : String
let val : String
}
struct category : Decodable{
let name : String
let val : String
}
struct shop : Decodable{
let name : String
let val : String
}
我不明白为什么会出错,控制台说是预期的数组,但是找到了字典,但不幸的是我不明白.
I don't understand why I get an error, Console says expected array but dictionary found but I don't understand unfortunately.
推荐答案
好吧,我建议您使用 quicktype
它将帮助您制作模型
我使用它,这是模型
struct ProductDetail: Codable {
let code: Int?
let data: DataClass?
let error: String?
}
struct DataClass: Codable {
let id, title: String?
let images: [String]?
let shortDesc, desc: String?
let price, discountPrice, quantity: Int?
let category, brand: Brand?
let variants: [Variant]?
let stockCode, updatedDate: String?
let status, isDeleted, isNew, freeCargo: Bool?
let createDate, note1, note2, note3: String?
let shop: Brand?
enum CodingKeys: String, CodingKey {
case id = "_id"
case title, images, shortDesc, desc, price, discountPrice, quantity, category, brand, variants, stockCode, updatedDate, status, isDeleted, isNew, freeCargo, createDate, note1, note2, note3, shop
}
}
struct Brand: Codable {
let name, val: String?
}
struct Variant: Codable {
let name, value: String?
let quantity: Int?
let variantCode: String?
}
之后,您可以使用 JSONDecoder
Alamofire.request(urlCourses, method: .get, parameters: nil, encoding: URLEncoding.default, headers: nil).responseJSON { (response) in
switch response.result {
case .success:
guard let data = response.data else { return }
do {
let productDetail = try? JSONDecoder().decode(ProductDetail.self, from: jsonData)
} catch let jsonError {
print("Error serializing json:", jsonError)
}
case .failure(let error):
print(error)
}
}
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