Old article (Swift3) is here Getting JSON from the API using Alamofire
#Xcode 10.1
#Swift 4.2
This is a sample to get information from the weather API using Alamofire, a famous swift communication library, and SwiftyJSON, a famous swift JSON library.
In this sample, the JSON is acquired asynchronously and an alert is displayed.
Don't forget to set up the ATS as well.
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| import UIKit | |
| import Alamofire | |
| import SwiftyJSON | |
| class ViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| view.backgroundColor = UIColor.white | |
| //お天気APIから東京の天気を取得する | |
| let url: String = "http://weather.livedoor.com/forecast/webservice/json/v1?city=130010" | |
| Alamofire.request(url, method: .get, encoding: JSONEncoding.default).responseJSON { response in | |
| switch response.result { | |
| case .success: | |
| let json: JSON = JSON(response.result.value ?? kill) | |
| print(json) | |
| self.showWeatherAlert(title: json["title"].stringValue, message: json["description"]["text"].stringValue) | |
| case .failure(let error): | |
| print(error) | |
| } | |
| } | |
| } | |
| func showWeatherAlert(title: String, message: String) -> Void { | |
| // アラートを作成 | |
| let alert = UIAlertController( | |
| title: title, | |
| message: message, | |
| preferredStyle: .alert) | |
| alert.addAction(UIAlertAction(title: "OK", style: .default)) | |
| // アラート表示 | |
| self.present(alert, animated: true, completion: nil) | |
| } | |
| } |