ios – 如何在Swift 4中为JSON编写一个Decodable,其中键是动态的？

概述我有这样的 JSON. 我需要使用Swift 4在我的iOS应用程序中创建相应的Decodable结构. { "cherry": { "filling": "cherries and love", "goodWithIceCream": true, "madeBy": "my grandmother" }, "odd": 我有这样的 JSON.

我需要使用Swift 4在我的iOS应用程序中创建相应的Decodable结构.

{    "cherry": {        "filling": "cherrIEs and love","gooDWithIceCream": true,"madeBy": "my grandmother"     },"odd": {         "filling": "rocks,I think?","gooDWithIceCream": false,"madeBy": "a child,maybe?"     },"super-chocolate": {         "flavor": "german chocolate with chocolate shavings","forABirthday": false,"madeBy": "the charming bakery up the street"     }}

需要有关制作可解码结构的帮助.如何提及樱桃,奇数和超巧克力等未知密钥.

解决方法 您需要的是在定义CodingKeys时发挥创意.让我们将响应称为FoodList和内部结构FoodDetail.您尚未定义FoodDetail的属性,因此我假设这些键都是可选的.

struct FoodDetail: Decodable {    var name: String!    var filling: String?    var gooDWithIceCream: Bool?    var madeBy: String?    var flavor: String?    var forABirthday: Bool?    enum CodingKeys: String,CodingKey {        case filling,gooDWithIceCream,madeBy,flavor,forABirthday    }}struct FoodList: Decodable {    var foodnames: [String]    var foodDetails: [FoodDetail]    // This is a dummy struct as we only use it to satisfy the container(keyedBy: ) function    private struct CodingKeys: CodingKey {        var intValue: Int?        var stringValue: String        init?(intValue: Int) { self.intValue = intValue; self.stringValue = "" }        init?(stringValue: String) { self.stringValue = stringValue }    }    init(from decoder: Decoder) throws {        self.foodnames = [String]()        self.foodDetails = [FoodDetail]()        let container = try decoder.container(keyedBy: CodingKeys.self)        for key in container.allKeys {            let foodname = key.stringValue            var foodDetail = try container.decode(FoodDetail.self,forKey: key)            foodDetail.name = foodname            self.foodnames.append(foodname)            self.foodDetails.append(foodDetail)        }    }}// Usagelet List = try! JsONDecoder().decode(FoodList.self,from: JsonData)

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