codable.swift

import Foundation
import CoreGraphics

var points: [CGPoint] = []
points.append(.zero)
points.append(CGPoint(x: 10, y: 20))

let encoder = JSONEncoder()
let encoded = try! encoder.encode(points)
let json = String(data: encoded, encoding: .utf8)!
debugPrint(json)

let decoder = JSONDecoder()
let data = json.data(using: .utf8)!
let decoded = try! decoder.decode([CGPoint].self, from: data)
debugPrint(decoded)