ios - getting error GestureRecognizer with UIImageview in swift -

i using 20 uiimageview have given tag value of each imageview

now want add gesturerecognizer on each image view

for index in 0 ... fields.count - 1{               let gesturerecognizer = uitapgesturerecognizer(target: self, action: "fieldstappedaction")             gesturerecognizer.numberoftapsrequired = 1             println(fields[index])             fields[index].addgesturerecognizer(gesturerecognizer)           } 

now trying tag using fieldstappedaction

 func fieldstappedaction (recognizer:uitapgesturerecognizer){           let tappedfield = recognizer.view as! tttimageview         tappedfield.setplayer(currectplayer) } 

but not working when taped imageview getting app crashed in time of tap.

fieldstapped]: unrecognized selector sent instance 0x7fc95a4abf90  *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: '- 

your selector has arguments needs colon after name. so:

let gesturerecognizer = uitapgesturerecognizer(target: self, action: "fieldstappedaction:")