ios - presentViewController gives Error -

this first question here might not in best format.

in app want show next screen, 1 working fine when alone, there should no problem here. using following code make transition

let dataviewcontroller = self.storyboard?.instantiateviewcontrollerwithidentifier("data")              self.presentviewcontroller(dataviewcontroller, animated: true, completion: nil) 

on second line self.presentviewcontroller error message:

cannot convert expression's type '(anyobject?, animated: booleanliteralconvertible, completion: nilliteralconvertible)' type 'booleanliteralconvertible'

the answer found, 1 having same error, function presentviewcontroller , not presentedviewcontroller. have admit had problem. after fixing error in code error message did not disappear. show me right direction search or got answer.

you need specify expected type instantiateviewcontrollerwithidentifier use following line when getting view controller:

let dataviewcontroller = self.storyboard?.instantiateviewcontrollerwithidentifier("data") uiviewcontroller? 

the 'as' keyword informs compiler of real type expect in return (aka. casting).

instantiateviewcontrollerwithidentifier returns object of type anyobject. since didn't specify type anyobject (equivalent toid in objc) used.

presentviewcontroller expects uiviewcontroller instance , give him anyobject instead, hence error