私はスイフト3で閉鎖から配列を抽出しようとしています。 WeatherGetterクラスにJSONパーサーがあり、viewcontroller.swiftにファイルを読み込んだときにweather_data配列をいくつかの外部変数に割り当てる方法を呼び出していますか?すぐに閉鎖外のデータにアクセスすることができません
class WeatherGetter {
func getWeather(_ zip: String, startdate: String, enddate: String, completion: @escaping (([[Double]]) -> Void)) {
// This is a pretty simple networking task, so the shared session will do.
let session = URLSession.shared
let string = "Insert API address"
let url = URL(string: string)
var weatherRequestURL = URLRequest(url:url! as URL)
weatherRequestURL.httpMethod = "GET"
// The data task retrieves the data.
let dataTask = session.dataTask(with: weatherRequestURL) {
(data, response, error) -> Void in
if let error = error {
// Case 1: Error
// We got some kind of error while trying to get data from the server.
print("Error:\n\(error)")
}
else {
// Case 2: Success
// We got a response from the server!
do {
var temps = [Double]()
var winds = [Double]()
let weather = try JSON(data: data!)
//print(weather)
let conditions1 = weather["data"]
let conditions2 = conditions1["weather"]
let count = conditions2.count
for i in 0...count-1 {
let conditions3 = conditions2[i]
let conditions4 = conditions3["hourly"]
let count2 = conditions4.count
for j in 0...count2-1 {
let conditions5 = conditions4[j]
let tempF = conditions5["tempF"].doubleValue
let windspeed = conditions5["windspeedKmph"].doubleValue
//temps.updateValue(tempF, forKey: "\(date)//\(j)")
temps.append(tempF)
winds.append(windspeed)
}
}
//print(temps)
//print(winds)
completion([temps, winds])
}
catch let jsonError as NSError {
// An error occurred while trying to convert the data into a Swift dictionary.
print("JSON error description: \(jsonError.description)")
}
}
}
// The data task is set up...launch it!
dataTask.resume()
}
}
override func viewDidLoad() {
super.viewDidLoad()
let weather = WeatherGetter()
weather.getWeather("13323", startdate: "2016-10-01", enddate: "2017-04-30"){(weather_data) -> Void in
print(weather_data[1])
}
//Do your stuff with isResponse variable.
}
なぜあなたの 'getWeather()'メソッドは何も返さないのですか?結局のところ、「取得」と呼ばれています。 – NRitH