Question

嘿，我想解码此json数据，我想获取城市，但是如果删除模型中的位置，其他人都可以，但是失败了。谁能帮我这是我的代码。

"results": {
    "datetime": [
        {
            "times": {
                "Imsak": "04:07",
                "Sunrise": "05:32",
                "Fajr": "04:17",
                "Dhuhr": "11:47",
                "Asr": "15:14",
                "Sunset": "18:02",
                "Maghrib": "18:16",
                "Isha": "19:13",
                "Midnight": "23:10"
            },
            "date": {
                "timestamp": 1544659200,
                "gregorian": "2018-12-13",
                "hijri": "1440-04-06"
            }
        }
    ],
    "location": {
        "latitude": -6.2375,
        "longitude": 106.69556,
        "elevation": 26,
        "city": "Ciputat",
        "country": "Republic of Indonesia",
        "country_code": "ID",
        "timezone": "Asia/Jakarta",
        "local_offset": 7
    }
}

这是我的模型对象，其中城市关联键中没有值，但没有值，但是奇怪的是，如果删除结构结果下的var位置，并且所有关联都可以正常工作，则只有位置是问题。

struct PrayerModel: Decodable {
   var results: Results
}

struct Results: Decodable {
   var datetime: [DateTime]
   var location: Location
}

struct Location: Decodable {
   var city: String

init(dictionary: [String: String]) {
    self.city = dictionary["city"] ?? ""
  }
}

struct DateTime: Decodable {
   var times: Times
}

struct Times: Decodable {
  var Imsak: String
  var Sunrise: String
  var Fajr: String
  var Dhuhr: String
  var Asr: String
  var Sunset: String
  var Maghrib: String
  var Isha: String
  var Midnight: String

init(dictionary: [String: String]) {
    self.Imsak = dictionary["Imsak"] ?? ""
    self.Sunrise = dictionary["Sunrise"] ?? ""
    self.Fajr = dictionary["Fajr"] ?? ""
    self.Dhuhr = dictionary["Dhuhr"] ?? ""
    self.Asr = dictionary["Asr"] ?? ""
    self.Sunset = dictionary["Sunset"] ?? ""
    self.Maghrib = dictionary["Maghrib"] ?? ""
    self.Isha = dictionary["Isha"] ?? ""
    self.Midnight = dictionary["Midnight"] ?? ""
  }
}

这是我的错误出现的地方，错误在哪里？我不明白

Failed to decode data: keyNotFound(CodingKeys(stringValue: "city", intValue: nil), Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "results", intValue: nil), CodingKeys(stringValue: "location", intValue: nil)], debugDescription: "No value associated with key CodingKeys(stringValue: \"city\", intValue: nil) (\"city\").", underlyingError: nil))

Answer 1

这对我有用，不确定您为什么使用带有Codable的字典中的init

import UIKit
import PlaygroundSupport

let jsonData = """
{ 
    "results": {
        "datetime": [{
            "times": {
                "Imsak": "04:07",
                "Sunrise": "05:32",
                "Fajr": "04:17",
                "Dhuhr": "11:47",
                "Asr": "15:14",
                "Sunset": "18:02",
                "Maghrib": "18:16",
                "Isha": "19:13",
                "Midnight": "23:10"
            },
            "date": {
                "timestamp": 1544659200,
                "gregorian": "2018-12-13",
                "hijri": "1440-04-06"
            }
        }],
        "location": {
            "latitude": -6.2375,
            "longitude": 106.69556,
            "elevation": 26,
            "city": "Ciputat",
            "country": "Republic of Indonesia",
            "country_code": "ID",
            "timezone": "Asia/Jakarta",
            "local_offset": 7
        }
    }
}
""".data(using: .utf8)!

struct PrayerModel: Decodable {
    var results: Results
}

struct Results: Decodable {
    var datetime: [DateTime]
    var location: Location
}

struct Location: Decodable {
    var city: String
}

struct DateTime: Decodable {
    var times: Times
}

struct Times: Decodable {
    var Imsak: String
    var Sunrise: String
    var Fajr: String
    var Dhuhr: String
    var Asr: String
    var Sunset: String
    var Maghrib: String
    var Isha: String
    var Midnight: String
}

do {
    let result = try JSONDecoder().decode(PrayerModel.self, from: jsonData)
    print(result)

    print("city: \(result.results.location.city)")
} catch {
    print(error)
}

输出：

PrayerModel（结果：__lldb_expr_53.Results（日期时间：[__lldb_expr_53.DateTime（时间：__lldb_expr_53.Times（Imsak：“ 04:07”，Sunrise：“ 05:32”，Fajr：“ 04:17”，Dhuhr： “ 11:47”，Asr：“ 15:14”，日落：“ 18:02”，Maghrib：“ 18:16”，Isha：“ 19:13”，午夜：“ 23:10”）））]，位置：__lldb_expr_53.Location（city：“ Ciputat”）））

城市：Ciputat

没有与键解析json相关联的值

1 个答案: