ios - Dismissing multiple view controllers showing wrong view during transition -

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i have total of 4 uiviewcontrollers. each of views has button when pressed presents next viewcontroller. when button on last uiviewcontroller pressed calls dismissviewcontrolleranimated(true, , completion: nil) on rootviewcontroller. when called shows view #2, instead of staying view #4, transitions view #1. in documentation says when top-most view view animated during dismissing, that's not case me? happens if used segues.

class viewcontroller1: uiviewcontroller {     @ibaction func btndidtouch(sender: anyobject) {         var viewcontroller = self.storyboard!.instantiateviewcontrollerwithidentifier("viewcontroller2") as! uiviewcontroller         self.presentviewcontroller(viewcontroller, animated: true, completion: nil)     } } class viewcontroller2: uiviewcontroller {     @ibaction func btndidtouch(sender: anyobject) {         var viewcontroller = self.storyboard!.instantiateviewcontrollerwithidentifier("viewcontroller3") as! uiviewcontroller         self.presentviewcontroller(viewcontroller, animated: true, completion: nil)     } } class viewcontroller3: uiviewcontroller {     @ibaction func btndidtouch(sender: anyobject) {         var viewcontroller = self.storyboard!.instantiateviewcontrollerwithidentifier("viewcontroller4") as! uiviewcontroller         self.presentviewcontroller(viewcontroller, animated: true, completion: nil)     } } class viewcontroller4: uiviewcontroller {     @ibaction func btndidtouch(sender: anyobject) {         self.view.window?.rootviewcontroller!.dismissviewcontrolleranimated(true, completion: nil)     } }


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