将日期格式iso-8601更改为自定义格式

我已经编写了以下代码,但是我得到了nil作为timestamp,而且我假设当timestamp是iso-8601格式时,“date”不是正确的类型:

Swift.DecodingError.Context文件(codingPath:[\u JSONKey(stringValue:”索引 0“,intValue:0),编码键(stringValue:“timestamp”,intValue: nil)],debugDescription:“应解码Double,但发现

雨燕4

import UIKit

enum Type : String, Codable {
    case organizational, planning
}

// structure from json file
struct News: Codable{
    let type: Type
    let timestamp: Date //comes in json with ISO-8601-format
    let title: String
    let message: String

    enum  CodingKeys: String, CodingKey { case type, timestamp, title, message}

    let dateFormatter : DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "dd/MM/yy HH:mm:ss"  // change format ISO-8601 to dd/MM/yy HH:mm:ss
        return formatter
    }()

    var dateString : String {
        return dateFormatter.string(from:timestamp) // take timestamp variable of type date and make it a string -> lable.text
    }
}