How Do I add Pins (Annotations) with Xcode 6 (Swift)

I'm new to the swift language, and haven't done an application with mapkit yet. But I have the map and regions set, but I'm hung up on how to allow users to add pins. Let me clarify, I have no idea of even where to start, All I have at the moment (for the pins) is my variable, but I'm not even sure if that's correct. Any help would be much appreciated!! What I have...

var MyPins: MKPinAnnotatoinView!

......

override func viewDidLoad() {
    super.viewDidLoad()

Mapview code

..... ..... }