HTTP request in swift 3 Xcode 8.3

Question

I am getting stuck with HTTP request.it did not show any error.compiler reads the first two lines and skip the code to "task.resume()".i am fetching data with same code on other view controller but it creats problem here

func getCustomers()
{
    let url = NSURL(string: "myURL.com")
    let task = URLSession.shared.dataTask(with: url! as URL) {
        (data, response, error) in

        guard let _:Data = data, let _:URLResponse = response  , error == nil else {
            print("error: \(String(describing: error))")

            return
        }
        do
        {
            self.getcustomersArray = [GetCustomers]()
            //JSON Parsing
            if let data = data,

                let json = try JSONSerialization.jsonObject(with: data) as? [String: Any]
            {
                let results = json["Result"] as? [[String : Any]]

                let getCustomersObject:GetCustomers = GetCustomers()
                for result in results!
                {
                    getCustomersObject.ActivityPrefix = (result["ActivityPrefix"] as? String)!
                    getCustomersObject.CustomerID = (result["CustomerID"] as? String)!
                    getCustomersObject.CustomerName = (result["CustomerName"] as? String)!
                    getCustomersObject.TFMCustomerID = (result["TFMCustomerID"] as? String)!
                    getCustomersObject.ShortName = (result["ShortName"] as? String)!
                    getCustomersObject.UserRights = (result["UserRights"] as? Int)!

                    self.totalCustomers += self.totalCustomers
                }
                self.customerName = getCustomersObject.CustomerName

            }
        }//end Do
        catch
        {

        }
    }

    task.resume()
}

Its obvious because completion block of dataTask will call later when you get response — Nirav D
– Nirav D, Commented Apr 14, 2017 at 11:09

Saumil Shah · Accepted Answer · 2017-04-14 11:09:53Z

1

Using Block GET/POST/PUT/DELETE:

 let request = NSMutableURLRequest(url: URL(string: "Your API URL here" ,param: param))!,
        cachePolicy: .useProtocolCachePolicy,
        timeoutInterval:"Your request timeout time in Seconds")
    request.httpMethod = "GET"
    request.allHTTPHeaderFields = headers as? [String : String] 

    let session = URLSession.shared

    let dataTask = session.dataTask(with: request as URLRequest) {data,response,error in
        let httpResponse = response as? HTTPURLResponse

        if (error != nil) {
         print(error)
         } else {
         print(httpResponse)
         }

        DispatchQueue.main.async {
           //Update your UI here
        }

    }
    dataTask.resume()

I think you dont mention line request.httpMethod = "GET"

answered Apr 14, 2017 at 11:09

Saumil Shah

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3 Comments

vadian Over a year ago

For a GET request an explicit URLRequest is not needed and in Swift 3 use native URLRequest rather than NSMutableURLRequest.

Saumil Shah Over a year ago

Thank you for share your knowledge. I mean that he missed request httpMethod.

vadian Over a year ago

Basically the code in the question is working, GET is the default.

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