ios - UILongPressGestureRecognizer: action method not being called -

i trying add annotation map when there long press touch been done user. have implemented code shown in image action method reason(i not able find! :( ) not been called. have checked few places , seems done way only. if can please tell doing wrong great.

currently app terminating , giving nsinvalidargumentexception.

thanks in advance! :)

you need change line :

let recognizer =  uilongpressgesturerecognizer(target: mapcontroller, action: "action:") 

to

let recognizer =  uilongpressgesturerecognizer(target: self, action: "action:") 

and work. method in self ( annotation class) itself.