ios - Swift:从 JSON 解析日期

Question

我正在做一个项目，我必须从 php 服务器接收数据。一切都很好，只有两件事: 1.) 无法解析日期。我知道这个问题已在这里得到解答，但没有一种变体适用于我的情况。这是我的代码

import Foundation
import SwiftyJSON


func getClientDataFromServer(id: String?) {
    guard let id = id else {return}
    let jsonUrlString = "https://sverlim.software/cms/clientReadOneClient.php?client_id=10"
    let url = URL(string: jsonUrlString)!
    URLSession.shared.dataTask(with: url) { (data, response, err) in
        guard err == nil else {
            print(err!.localizedDescription)
            return
        }
        print(response as Any)
        guard let data = data else {return}
        let dateFormatterWithTime: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        formatter.timeZone = TimeZone(abbreviation: "UTC")
        formatter.locale = Locale(identifier: "en_US_POSIX")
        return formatter
        }()

        let datastring = String(data: data, encoding: .utf8)
        print("data====\(datastring!)")
        let json = try! JSONSerialization.jsonObject(with: data, options: []) as! [[String:Any]]
        print(json[0]["datarteg"] as Any)
        do {
            let decoder = JSONDecoder()

            let object = try! JSON(data: data)
            print(object[0]["datareg"].dateTime)
            print(object[0]["company"].stringValue)

            decoder.dateDecodingStrategy = .formatted(dateFormatterWithTime)
            let clients = try decoder.decode([Client].self, from: data)
            print(clients)
            let client = clients.first
            print(client!)
        } catch let jsonErr {
            print(jsonErr)
        }
        }.resume()
}
struct Client: Codable {
    let id: String?
    let name: String?
    let phone: String?
    let company: String?
    let discount: String?
    var datareg: Date?
}

class Formatter {
    static let jsonDateFormatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy-MM-dd"
        return formatter
    }()

    static let jsonDateTimeFormatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy'-'MM'-'dd' 'HH':'mm':'ss"
        return formatter
    }()
}

extension JSON {

    public var date: Date? {
        get {
            switch self.type {
            case .string:
                return Formatter.jsonDateFormatter.date(from: self.object as! String)
            default:
                return nil
            }
        }
    }

    public var dateTime: Date? {
        get {
            switch self.type {
            case .string:
                return Formatter.jsonDateTimeFormatter.date(from: self.object as! String)
            default:
                return nil
            }
        }
}

我遵循了这个答案

Swift's JSONDecoder with multiple date formats in a JSON string?

How do I format JSON Date String with Swift?

https://useyourloaf.com/blog/swift-codable-with-custom-dates/

这是我从日志中打印的内容

data====
 [{"id":"10","name":"\u0423\u043a\u0440\u0430\u0438\u043d\u0435\u0446 
 \u0410\u043b\u0435\u043a\u0441\u0430\u043d\u0434\u0440","phone":"+38098497
 4673","company":"2","discount":"0","datereg":"2017-11-28 14:16:16"}]
 nil
 nil
 2
 [SashaApp.Client(id: Optional("10"), name: Optional("Украинец Александр"), 
 phone: Optional("+380984974673"), company: Optional("2"), discount: 
 Optional("0"), datareg: nil)]
 Client(id: Optional("10"), name: Optional("Украинец Александр"), phone: 
 Optional("+380984974673"), company: Optional("2"), discount: 
 Optional("0"), datareg: nil)

正如我们所看到的，数据包含“datareg”字段，但是在解析之后，无论哪种方式(JSONDecoder，JSONSerialization，SwiftyJSON)我都收到nil 2) SSL_ERROR_ZERO_RETURN(6)

伙计们将不胜感激任何帮助。谢谢))

Answer 1

您的文字中有一个拼写错误:

print(object[0]["datareg"].dateTime)

应该是

print(object[0]["datereg"].dateTime)