Codable 프로토콜

Codable 프로토콜

: A type that can convert itself into and out of an external representation.

 

typealias Codable = Decodable & Encodable

 

Message Data

struct Mesage: Codable {
    let sender: String
    let content: String
    let timeStamp: Double
}

Encoding (Swift Data -> JSON)

let sampleInput = Mesage(sender: "lyla", content: "오늘 뭐해?", timeStamp: Date().timeIntervalSince1970)

func encodeFunc() {
    do {
        let encoder = JSONEncoder()
        encoder.outputFormatting = .prettyPrinted
        let data = try encoder.encode(sampleInput)
        if let jsonString = String(data: data, encoding: .utf8) {
            print(jsonString)
        }
    } catch {
        print(error)
    }
}

 

Decoding (JSON -> Swift Data )

let jsonData = """
{
  "sender" : "lyla",
  "content" : "오늘 뭐해?",
  "timeStamp" : 1698477010.82001
}
""".data(using: .utf8)!

func decodeFunc() {
    do {
        let decoder = JSONDecoder()
           let data = try decoder.decode(Mesage.self, from: jsonData)
           print(data)
        print(data.content)
    } catch {
        print(error)
    }
}