如何解决此错误“-[__ SwiftValue encodeWithCoder：]：无法识别的选择器发送到实例0x2834ca6f0”？

Question

尝试编码对象时出现错误。我找到了很多答案，但这对我不起作用：（

我削减了代码，只留下了重要的

这是主类“ City”，其中包含元组以及其中的“ cityHourlyForecast”和“ cityDailyForecast”数组

class City: NSObject, NSCoding {    
    var name: String
    var currentWeather: (isDayTime: Bool, lastUpdate: Date?, temp_C: Int, temp_F: Int, weatherIcon: String, weatherText: String) =
        ( isDayTime: true,
          lastUpdate: nil,
          temp_C: 0,
          temp_F: 0,
          weatherIcon: "1",
          weatherText: "" )
    var hourlyForecast: Array<cityHourlyForecast> = []
    var dailyForecast: Array<cityDailyForecast> = []

    init(name: String) {
        self.name = name
    }

    // MARK: NSCoding

    func encode(with coder: NSCoder) {
        coder.encode(self.name, forKey: "name")
        coder.encode(self.currentWeather, forKey: "currentWeather")
        coder.encode(self.hourlyForecast, forKey: "hourlyForecast")
        coder.encode(self.dailyForecast, forKey: "dailyForecast")
    }

    required convenience init?(coder: NSCoder) {
        guard let name = coder.decodeObject(forKey: "name") as? String
              else { return nil }
        self.init(name: name)
        if let currentWeather = coder.decodeObject(forKey: "currentWeather") {
            self.currentWeather = currentWeather as! (isDayTime: Bool, lastUpdate: Date?, temp_C: Int, temp_F: Int, weatherIcon: String, weatherText: String)
        }
        if let hourlyForecast = coder.decodeObject(forKey: "hourlyForecast") {
            self.hourlyForecast = hourlyForecast as! Array<cityHourlyForecast>
        }
        if let dailyForecast = coder.decodeObject(forKey: "dailyForecast") {
            self.dailyForecast = dailyForecast as! Array<cityDailyForecast>
        }
    }
}

cityHourlyForecast：

class cityHourlyForecast: NSObject, NSCoding {

    var dateTime: String
    var temp_C: Int

    init (dateTime: String, temp_C: Int) {
        self.dateTime = dateTime
        self.temp_C = temp_C
    }

    func encode(with coder: NSCoder) {
        coder.encode(dateTime, forKey: "dateTime")
        coder.encode(temp_C, forKey: "temp_C")
    }

    required convenience init?(coder: NSCoder) {
        guard let dateTime = coder.decodeObject(forKey: "dateTime") as? String,
              let temp_C = coder.decodeObject(forKey: "temp_C") as? Int
              else { return nil }
        self.init(dateTime: dateTime, temp_C: temp_C)
    }
}

cityDailyForecast：

class cityDailyForecast: NSObject, NSCoding {    
    var dateTime: String
    var temp_min_C: Int
    var temp_max_C: Int

    init (dateTime: String, temp_min_C: Int, temp_max_C: Int) {
        self.dateTime = dateTime
        self.temp_min_C = temp_min_C
        self.temp_max_C = temp_max_C
    }

    func encode(with coder: NSCoder) {
        coder.encode(dateTime, forKey: "dateTime")
        coder.encode(temp_min_C, forKey: "temp_min_C")
        coder.encode(temp_max_C, forKey: "temp_max_C")
    }

    required convenience init?(coder: NSCoder) {
        guard let dateTime = coder.decodeObject(forKey: "dateTime") as? String,
              let temp_min_C = coder.decodeObject(forKey: "temp_min_C") as? Int,
              let temp_max_C = coder.decodeObject(forKey: "temp_max_C") as? Int
              else { return nil }
        self.init(dateTime: dateTime, temp_min_C: temp_min_C, temp_max_C: temp_max_C)
    }    
}

在这里，我尝试使用getter和setter初始化“ City”的数组

var AccuCities:Array<City> {
    get{
        if let array = UserDefaults.standard.object(forKey: "Cities") as? Data {
            let decodedArray = NSKeyedUnarchiver.unarchiveObject(with: array)
            return decodedArray as! Array<City>
        } else {
            return []
        }
    }
    set{
        let encodedArray = NSKeyedArchiver.archivedData(withRootObject: newValue)
        UserDefaults.standard.set(encodedArray, forKey: "Cities")
        UserDefaults.standard.synchronize()
    }
}

我该如何编码我的“城市”数组并将其保存到UserDefaults？