When trying to create my own session object NSURLSession()
and request an url I get an unrecognized selector exception but when I use the shared session NSURLSession.sharedSession()
everything works fine. How come?
var url = NSURL(string: "http:/www.google.com")
if url != nil {
//throws unrecognized selector when dataTaskWithURL is called
let session=NSURLSession()
session.dataTaskWithURL(url!)
//works
let sharedSession=NSURLSession.sharedSession()
sharedSession.dataTaskWithURL(url!)
}
You have to init
URLSession
with a configuration:or use shared session
Do the initialization while declaration :-
Aside from the shared session
NSURLSession
must be initialized with one of these two methodsIn SWIFT 3.0 and up: