urlsession-delegate.swift

public class ApiRequestDelegate:NSObject, URLSessionDelegate, URLSessionTaskDelegate,
URLSessionDataDelegate{
    
    // called once as soon as a response returns
    public func urlSession(session: URLSession, dataTask: URLSessionDataTask,
                           didReceiveResponse response: URLResponse,
                           completionHandler: (URLSession.ResponseDisposition) -> Void) {
        // store Response to further process it and call completion Handler to continue
    }
    
    // called when finished
    public func urlSession(session: URLSession, task: URLSessionTask,
                           didCompleteWithError error: NSError?) {
        // handle errors and e.g. call a completion handler so you can continue with your tasks or start a different request
    }
    
    // called if data is not returned in one block
    public func urlSession(_: URLSession, dataTask: URLSessionDataTask,
                           didReceive data: NSData) {
    }
}