Swift 不在应用程序中打印或显示来自天气 API 的名称？

Question

if let jsonObj = jsonObj as? [String: Any],

let weatherDictionary = jsonObj["weather"] as? [String: Any],

let weather = weatherDictionary["description", default: "clear sky"] as? 
NSDictionary {

                            print("weather")

                        DispatchQueue.main.async {
                            self.conditionsLabel.text = "\(weather)"
                        }
                    }

// to display weather conditions in "name" from Open Weather

"weather":[{"id":800,"main":"Clear","description":"clear sky","icon":"01n"}]

//No errors, but code is not printing or displaying in App.

Answer 1

除非您可以提供更多上下文代码，否则我不确定如何帮助解决您的确切问题。然而，

您可以尝试使用 Swift 4 附带的内置解码。查看 here.基本上，您创建一个对响应对象建模的类，如下所示:

struct Weather: Decodable {
    var id: Int
    var main: String
    var description: String
    var icon: String
}

然后像这样解码它:

let decoder = JSONDecoder()
let weather = try decoder.decode(Weather.self, from: jsonObj)

它会神奇地解码成您需要的数据!如果这不起作用，请告诉我，如果您有更多我可以帮助解决您的问题的代码上下文，请发表评论。