waitUntilAllTasksAreFinished error Swift

Question

I have this call in my loginViewController when Submit button is pressed:

let http = HTTPHelper()
    http.post(\"http://someUrl.com/Login/userEmail/\\(username.         


        

Answer 1

With Xcode 8.0 and Swift 3, this has been modified to the following construct:

OperationQueue.main.addOperation{
    
}