swift - Dragging UITextView Around Screen -

i'm trying allow user draw uitextview around screen in snapchat app. tried code below doesn't seem work. suggestions? don't thin detectpan method being called. have override uitextfielddelegate property?

var panrecognizer = uipangesturerecognizer(target:self, action:"detectpan:") text.addgesturerecognizer(panrecognizer)  func detectpan(sender:uipangesturerecognizer) {         self.view.bringsubviewtofront(sender.view!)         var translation = sender.translationinview(self.view)         sender.view!.center = cgpointmake(sender.view!.center.x + translation.x, sender.view!.center.y + translation.y)         sender.settranslation(cgpointzero, inview: self.view) } 

not sure if efficient way go put textview in view , disabled user interactions. made tap gesture (which makes textview first responder) , pan gesture (which moves view).