ios - AlamofireObjectMapper 结果为零

Question

所以我正在使用天气 API: https://api.darksky.net/forecast/88d117d813f2014a1ce7f3de6a00c720/50.909698,-1.404351

我想要实现的是将每分钟的所有 precipIntensity 放入一个数组中。这样我就可以制作一个图表，其中 Y 是 precipIntensity，X 是 array.count(使用此 API 最多可以计数到 61)。

这是我在 ViewController 中的代码:

func downloadWeatherDetails(completed: DownloadComplete) {
    // Alamofire Download
    let currentWeatherURL = URL(string: WeatherURL)!
    Alamofire.request(currentWeatherURL).responseObject { (response: DataResponse<WeatherResponse>) in

        let Forecast = response.result.value
        if let minutelyForecast = Forecast?.minutelyForecast {
            for forecast in minutelyForecast {
                print(forecast.time)
                print(forecast.precipIntensity)
            }
        }

    }
}

我的类文件如下:

class WeatherResponse: Mappable {
    var summary: String!
    var minutelyForecast: [Forecast]?

    required init?(map: Map) {

    }

    func mapping(map: Map) {
        summary <- map["minutely.summary"]
        minutelyForecast <- map["minutely.data"]
    }
}

class Forecast: Mappable {
    var time: String!
    var precipIntensity: String!

    required init?(map: Map) {

    }

    func mapping(map: Map) {
        time <- map["time"]
        precipIntensity <- map["precipIntensity"]
    }
}

然而 print(forecast.precipIntensity) 打印出 nil，61 次。

1. 如何获取此信息？
2. 如何将其放入数组中以使其成为图表并继续我的工作？

提前致谢。

Answer 1

您的代码的问题是 time 和 precipIntensity 不是字符串值，而是数字。

class Forecast: Mappable {
    var time: Int!
    var precipIntensity: Double!
    ...
}

提取降水数据:

func downloadWeatherDetails(completed: DownloadComplete) {
    // Alamofire Download
    let currentWeatherURL = URL(string: WeatherURL)!
    Alamofire.request(currentWeatherURL).responseObject { (response: DataResponse<WeatherResponse>) in

        let Forecast = response.result.value
        if let minutelyForecast = Forecast?.minutelyForecast {
            // Data is already sorted from the API
            // but you could be sure nothing happened while decoding
            // by using `sorted()`
            let minutelyPrecipIntensity = minutelyForecast
                .sorted { $0.time < $1.time }
                .flatMap { $0.precipIntensity }
        }

    }
}

编辑:删除可编码答案