可以在 Swift 应用程序和后端之间交换对象吗?

Possible to exchange objects between Swift app and backend?

据我目前所知,一种方法是使用 JSON。但是,将 swift 对象发送到服务器以确保服务器具有相同的 class 可用似乎更好更容易。这样我就可以继续使用 swift 每一步。

这可能吗?我该怎么做?

当前设置:

  1. Swift游乐场发送数据。
  2. Kitura 服务器接收数据。

游乐场代码:

import UIKit
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

struct TestObject {
    let foo = "just a string"
    let number = 125
    let array = ["bar", "foo"]

    func printSomeInfo() {
        print(foo + "\(number+25)")
    }
}

func send() {
    let request = NSMutableURLRequest(url: URL(string: "http://192.168.178.80:8090/test")!)
    request.httpMethod = "POST"

    let testObject = TestObject()

    let bodyData = "\(testObject)"
    request.httpBody = bodyData.data(using: String.Encoding.utf8)

    let task =  URLSession.shared.dataTask(with: request as URLRequest,
                                           completionHandler: {
                                            (data, response, error) -> Void in

    })

    task.resume()
}

send()

Kitura main.swift 代码:

import Kitura
import Foundation

let router = Router()

struct TestObject {
    let foo = "just a string"
    let number = 125
    let array = ["bar", "foo"]

    func printSomeInfo() {
        print(foo + "\(number+25)")
    }
}

router.post("/test") {request, response, next in
    response.headers["Content-Type"] = "text/plain; charset=utf-8"

    if let post = try request.readString() {
        // would like to cast to TestObject but that doesn't work
        // let postObject = post as TestObject
        print(post)
    }
}

Kitura.addHTTPServer(onPort: 8090, with: router)
Kitura.run()

对于您的情况,JSON 对象映射有一个很好的库。 https://github.com/Hearst-DD/ObjectMapper 但是,您需要在 类 和结构中添加一些额外的代码来实现它们被映射的能力

您需要通过网络以某种方式序列化数据。最常见的方法之一是使用 JSON。 This recent swift blog 解释了如何做到这一点。如果您需要为很多不同的对象执行此操作,您可以将 JSON serialization/deserialization 抽象为一个公共基础。