类型“ MyWeather”不符合协议“可编码”错误

Question

I'm trying to make an iOS app that uses the OpenWeatherMap API to check the current weather, but I'm getting an error saying 'Type 'MyWeather' does not conform to protocol 'Encodable''. I am new to Swift Programming and it's probably a simple mistake. I would appreciate any help, thank you.

My code below:

struct MyWeather: Codable {

    let name: String?
    let location: String?
    let temp: URL?
    let wind: Int?

    //THE NAMES OF THE JSON STUFF IN THE LINK


    private enum CodingKeys: String, CodingKey {

        case weather
        case name
        case location
        case temp
        case wind

        //THE NAMES OF THE JSON STUFF IN THE LINK

    }


     }

class ViewController: UIViewController {

    @IBAction func ShowWeatherInfo(_ sender: Any) {

        guard let APIUrl = URL(string: "http://api.openweathermap.org/data/2.5/weather?q=Crowland&appid=APIKEY&units=Metric") else { return }

        URLSession.shared.dataTask(with: APIUrl) { (data, response
            , error) in

            guard let data = data else { return }
            do {

                let decoder = JSONDecoder()
                let weatherData = try decoder.decode(MyWeather.self, from: data)

Answer 1

You need to remove this

case weather

as there is no var for it also use CodingKeys only if you'll change key name , the Codable for the official json is

struct MyWeather: Codable {
    let cod: String
    let message: Double
    let cnt: Int
    let list: [List]
    let city: City
}

struct City: Codable {
    let id: Int
    let name: String
    let coord: Coord
    let country: String
}

struct Coord: Codable {
    let lat, lon: Double
}

struct List: Codable {
    let dt: Int
    let main: MainClass
    let weather: [Weather]
    let clouds: Clouds
    let wind: Wind
    let sys: Sys
    let dtTxt: String
    let rain, snow: Rain?

    enum CodingKeys: String, CodingKey {
        case dt, main, weather, clouds, wind, sys
        case dtTxt = "dt_txt"
        case rain, snow
    }
}

struct Clouds: Codable {
    let all: Int
}

struct MainClass: Codable {
    let temp, tempMin, tempMax, pressure: Double
    let seaLevel, grndLevel: Double
    let humidity: Int
    let tempKf: Double

    enum CodingKeys: String, CodingKey {
        case temp
        case tempMin = "temp_min"
        case tempMax = "temp_max"
        case pressure
        case seaLevel = "sea_level"
        case grndLevel = "grnd_level"
        case humidity
        case tempKf = "temp_kf"
    }
}

struct Rain: Codable {
    let the3H: Double?

    enum CodingKeys: String, CodingKey {
        case the3H = "3h"
    }
}

struct Sys: Codable {
    let pod: Pod
}

enum Pod: String, Codable {
    case d = "d"
    case n = "n"
}

struct Weather: Codable {
    let id: Int
    let main: MainEnum
    let description: Description
    let icon: String
}

enum Description: String, Codable {
    case brokenClouds = "broken clouds"
    case clearSky = "clear sky"
    case fewClouds = "few clouds"
    case lightRain = "light rain"
    case moderateRain = "moderate rain"
}

enum MainEnum: String, Codable {
    case clear = "Clear"
    case clouds = "Clouds"
    case rain = "Rain"
}

struct Wind: Codable {
    let speed, deg: Double
}