Swift: 自定义键值编码，在结构中符合 Encodable

Question

struct Struct: Encodable {
  let key: String
  let value: String
}

let aStruct = Struct(key: "abc", value: "xyz")

鉴于此结构和提供的默认 Encodable 一致性，JSON 编码产生

{
    key = abc;
    value = xyz;
}

而我想将其编码为

{
    abc = xyz;
}

如何使此结构符合 Encodable 以得到此结果？

Answer 1

实施encode(to encoder: Encoder)并将结构编码为单个字典

struct Struct: Encodable {
    let key: String
    let value: String
    
    func encode(to encoder: Encoder) throws {
        var container = encoder.singleValueContainer()
        try container.encode([key:value])
    }
}

Swift: 自定义键值编码，在结构中符合 Encodable

Swift: custom key-value encoding with Encodable conformance in struct

json

swift

encodable