Converting Swift 2.3 to Swift 3.0 - Error, Cannot invoke 'dataTask' with an argument list of type'

Question

I\'m trying to convert one of my projects from Swift 2.3 to Swift 3.0 but some reason I get the following error...

Cannot invoke \'da

Answer 1

var request = URLRequest(url: storeURL!)
 request.httpMethod = "Post"

 let task = session.dataTask(with: request, 
                completionHandler: { (responseData:Data?, 
                                          response:URLResponse?, 
                                             error:Error?) -> Void in

 let task = session.dataTask(with: request, 
                completionHandler: { (responseData, response, error) -> Void in

https://swift.org/migration-guide-swift3/

Answer 2

The compiler wants URLRequest and Error

 ...
 var request = URLRequest(url: storeURL!)
 request.httpMethod = "Post"
 ...
 let task = session.dataTask(with: request, 
                completionHandler: { (responseData:Data?, 
                                          response:URLResponse?, 
                                             error:Error?) -> Void in

I recommend to omit all type annotations

 let task = session.dataTask(with: request, 
                completionHandler: { (responseData, response, error) -> Void in