ios - UITextField keyboard not dismissing -


i have uiviewcontroller uitextfield in , i'm trying dismiss keyboard when click away or view dismissed. however, when call resignfirstresponder(), keyboard still doesn't dismiss , i'm not quite sure why. here's code:

class messageviewcontroller: uiviewcontroller, uitextfielddelegate {     var messagetextfield : uitextfield = uitextfield()      override func viewdidload() {         ...         messagetextfield.frame = cgrectmake(10, uiscreen.mainscreen().bounds.size.height-50, uiscreen.mainscreen().bounds.size.width-80, 40)     messagetextfield.delegate = self     messagetextfield.borderstyle = uitextborderstyle.line     messagetextfield.becomefirstresponder()     self.view.addsubview(messagetextfield)      nsnotificationcenter.defaultcenter().addobserver(self, selector: "keyboardwillshow:", name: uikeyboardwillshownotification, object: nil)     nsnotificationcenter.defaultcenter().addobserver(self, selector: "keyboardwillhide:", name: uikeyboardwillhidenotification, object: nil)         ...     }      func textfieldshouldreturn(textfield: uitextfield) -> bool {         textfield.resignfirstresponder()         return true     }      override func touchesbegan(touches: set<nsobject>, withevent event: uievent) {         self.view.endediting(true)         println("touched")     }      func keyboardwillshow(notification: nsnotification) {         var keyboardsize = (notification.userinfo?[uikeyboardframebeginuserinfokey]as? nsvalue)?.cgrectvalue()         let messageframe = messagetextfield.frame         let newy = messageframe.origin.y - keyboardsize!.height         messagetextfield.frame = cgrectmake(messageframe.origin.x, newy, messageframe.size.width, messageframe.size.height)     }      func keyboardwillhide(notification: nsnotification) {         var keyboardsize = (notification.userinfo?[uikeyboardframeenduserinfokey]as? nsvalue)?.cgrectvalue()         let messageframe = messagetextfield.frame         let newy = messageframe.origin.y - keyboardsize!.height         messagetextfield.frame = cgrectmake(messageframe.origin.x, newy, messageframe.size.width, messageframe.size.height)     }  }

does know why keyboard isn't dismissing? added uitextfield view programmatically opposed using storyboard. make difference?

 class viewcontroller: uiviewcontroller,uitextfielddelegate {

confirm protocols

messagetextfield.delegate=self

set delegate

  func textfieldshouldreturn(textfield: uitextfield!) -> bool       {         messagetextfield.resignfirstresponder()         return true;     }

use code..


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