ios - Adding UIButton dynamically: action not getting registered -

i'm creating pages dynamically, each page contains navigation controller , uiviewcontroller.

inside each page, there components link, images, texts.

each component class following:

class link: component, componentprotocol {     var text: string     var url: string      func browseurl(sender: uibutton!){         let targeturl = nsurl(fileurlwithpath: self.url)         let application = uiapplication.sharedapplication()         application.openurl(targeturl!)     }      func generateview() -> uiview?{         var result: uiview?         var y = cgrectgetminy(frame)         var linkbtn = uibutton(frame: cgrect(x: 0, y:30 , width:300 , height: 50)         linkbtn.settitle(self.text, forstate: uicontrolstate.normal)         linkbtn.settitlecolor(uicolor.bluecolor(), forstate: uicontrolstate.normal)         linkbtn.titlelabel?.font = linkbtn.titlelabel?.font.fontwithsize(15)          // doesn't seem registered         linkbtn.addtarget(self, action: "browseurl:", forcontrolevents: uicontrolevents.touchupinside)          result = uiview()         result?.addsubview(linkbtn)          return result } 

then in viewdidload of page viewcontroller method have initialise page components:

    component in components!{         if let acomponent:componentprotocol = component as? componentprotocol {             if let res = acomponent.generateview(innerframe) {                 if let view = res.view {                     self.view.addsubview(view)                 }             }         }     } 

the button showing, when touch nothing happens. when debugged, browseurl no triggered @ all.

what's wrong code? i'm guessing because registered action in link class , not in viewcontroller of page?

update

this similar issue, answer not straightforward , have component reference in viewcontroller: (target: object) not working setting uibutton outside viewcontroller

i'm not @ mac right can't test, work:

linkbtn.target = self linkbtn.action = "browseurl:" 

i think if have selectors in swift have careful colons , specifying @objc if class doesn't inherit nsobject, that?