In my app delegate class, I am declaring locaitonManager:
var locationManager: CLLocationManager?
Value of type CLLocation Manager.... has no member ....
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
To answer my own question for future reference:
In ViewController's class:
let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
Then later in the code I am able to refer to the locationManager declared in App Delegate like this:
Hope this helps others.