ios - How to dynamically add an action to a UIButton -

i noticed had lot of functions dynamically add buttons in 1 of view controllers, goes against dry principle.

to fix this, wrote hit-everything configurebutton function:

func configurebutton (button: uibutton, action: string, title: string, pos: [cgfloat]) {     button.addtarget(self, action: action,             forcontrolevents: uicontrolevents.touchupinside)     // ^ throws error      // button.addtarget(self, action: "gotoscanner",     //        forcontrolevents: uicontrolevents.touchupinside)      /* configure else */              self.view.addsubview(button) } 

when had zillion different functions, wrote like

button.addtarget(self, action: "gotoscanner",    // <-- note string         forcontrolevents: uicontrolevents.touchupinside) 

in each of them, "gotoscanner" function want called on tap.

i want able dynamically pass action parameter button.addtarget configurebutton:

configurebutton(scanbutton, action: "gotoscanner", title: "scan", pos: [36.0, 300]) 

i tried passing closure () -> (), didn't work.

how can approach problem?

your method should

func configurebutton (button: uibutton, action: selector, title: string, pos: [cgfloat]) 

note how uses selector instead of string.

this because swift has no built in implementation of selector, you pass string , string literal type inferred selector (just how entering number literal work both int, float, nsnumber, etc).