swift将struct转化为json

来源：互联网发布：会议速记软件编辑：程序博客网时间：2024/06/05 18:06

struct Car: JSONSerializable {
        var manufacturer: String
        var model: String
        var mileage: Float

        var owner: Owner
    }

    struct Owner: JSONSerializable {
        var name: String
    }

let car = Car(manufacturer: "Tesla", model: "Model T", mileage: 1234.56, owner: Owner(name: "Emil"))

        if let json = car.toJSON() {
            print(json)

        }

//
// JSONSerializable.swift
// Longsheng
//
// Created by 关洪昌 on 16/9/30.
// Copyright © 2016年夸克时代. All rights reserved.
//

protocol JSONRepresentable {
    var JSONRepresentation: AnyObject { get }
}

protocol JSONSerializable: JSONRepresentable {
}

extension JSONSerializable {
    var JSONRepresentation: AnyObject {
        var representation = [String: AnyObject]()

        for case let (label?, value) in Mirror(reflecting: self).children {
            switch value {
            case let value as JSONRepresentable:
                representation[label] = value.JSONRepresentation

            case let value as NSObject:
                representation[label] = value

            default:
                // Ignore any unserializable properties
                break
            }
        }

        return representation as AnyObject
    }
}

extension JSONSerializable {
    func toJSON() -> String? {
        let representation = JSONRepresentation

        guard JSONSerialization.isValidJSONObject(representation) else {
            return nil
        }

        do {
            let data = try JSONSerialization.data(withJSONObject: representation, options: [])
            return String(data: data, encoding: String.Encoding.utf8)
        } catch {
            return nil
        }
    }
}

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