swift - How to navigate ViewController when clicking button in alertView -


given code below, when click "accept" button, doesn't navigate secondviewcontroller, shows black screen. appreciated.

   let alertcontroller = uialertcontroller(title: tit!, message: "book now!", preferredstyle: .alert)    let declineaction = uialertaction(title: "decline", style: .cancel, handler: nil)    alertcontroller.addaction(declineaction)     let acceptaction = uialertaction(title: "accept", style: .default) { (_) -> void in         let nv=secondviewcontroller()         self.presentviewcontroller(nv, animated:true, completion:nil)     }    presentviewcontroller(alertcontroller, animated: true, completion: nil)    alertcontroller.addaction(acceptaction)

to open uiviewcontroller must instantiate it. , doing creating object of class.

to so:

let nv = self.storyboard!.instantiateviewcontrollerwithidentifier("storyboardidentifier") as! secondviewcontroller self.presentviewcontroller(nv, animated:true, completion:nil)

this open uiviewcontroller wants!


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