Swift模型中数组和字典的JSON解码

Posted 2023-01-27

由于某种原因，我似乎无法从API解码以下JSON，这可能是因为我的模型不适用于JSON：

"definitions":["type":"noun","definition":"the larva of a 
butterfly.","example":null,"image_url":null,"emoji":null,
"type":"adjective","definition":"brand of heavy equipment.","example":null,"image_url":null,"emoji":null],
"word":"caterpillar","pronunciation":"ˈkadə(r)ˌpilər"

这是我的模特：

struct DefinitionReturned : Codable 
        let Definition : [Definition]
        let word : String
        let pronunciation : String

    
    struct Definition : Codable 
        let type: String
        let definition: String
        let example: String?
        let image_url: String?
        let emoji : String?
    

要解码的代码是：

let json = try? JSONSerialization.jsonObject(with: data, options: [])

                do 

                    let somedefinitions = try JSONDecoder().decode(DefinitionReturned.self, from: data)
                    print("here are the definitions",somedefinitions)

错误是：

ERROR IN DECODING DATA
The data couldn’t be read because it is missing.
keyNotFound(CodingKeys(stringValue: "Definition", intValue: nil), Swift.DecodingError.Context(codingPath: [], debugDescription: "No value associated with key CodingKeys(stringValue: \"Definition\", intValue: nil) (\"Definition\").", underlyingError: nil))

注意，可以有一个或多个定义。

我在做什么错？

答案

// MARK: - DefinitionReturned
struct DefinitionReturned: Codable 
    let definitions: [Definition]
    let word, pronunciation: String


// MARK: - Definition
struct Definition: Codable 
    let type, definition: String
    let example, imageURL, emoji: String?

    enum CodingKeys: String, CodingKey 
        case type, definition, example
        case imageURL = "image_url"
        case emoji
    

然后解码

let definitionReturned = try? JSONDecoder().decode(DefinitionReturned.self, from: jsonData)