Swift Closure 5.3

Here’s an example function in a struct, that makes use of an escaping closure.

import UIKit

struct Session {
    var url: String


    func Get(completion: @escaping  (_ result: String)  -> Void, onFailure: () -> Void)  {
        let configuraion = URLSessionConfiguration.default
        let session = URLSession(configuration: configuraion)
        guard let _url = URL(string: url) else { fatalError()}

        let task = session.dataTask(with: _url) { data, response, error in
            guard let httpResponse = response as? HTTPURLResponse,
                  (200..<300).contains(httpResponse.statusCode) else {
                return
            }
            guard let data = data else {
                return
            }
            if let result = String(data: data, encoding:. utf8) {
                print(result)
                completion(result)
            }
        }
        task.resume()
    }
}

Below is how you can call it

 let sess = Session(url: "https://aibot.cwxstat.io/")
 sess.Get(){ result in
       print(result)
       self.label0 = result
            } onFailure: {
                            print("Couldn't download the result")
           }