ios - Transition without loose data with Storyboard and Swift -

i'm developing new project in swift i've big (and dumb) problem.

i've 3 viewcontrollers:

1.- call webservices, take json , pass json second view

2.- parsing data , put data in view (tableview , ok). @ view go other view button (to view 3). don't need pass nothing.

3.- try go view 2 view empty because data posicioning @ tableview pass view 1.

i try lot of solutions:

• navigationcontroller!.dismissviewcontrolleranimated(false, completion: nil) -> if link storyboard transition view 3 view 2, view 2 empty, if don't link in storyboard -> unexpectedly found nil while unwrapping optional value

• if change "!" "?" nothing

• the same every code have been test.

my code is:

view 1 view 2: (connected in visual part of storyboard (ib))

@ibaction func gorecibospendientes(sender: uibutton) {          let controllervc = self.storyboard!.instantiateviewcontrollerwithidentifier("recibos") as! tablarecibostableviewcontroller          controllervc.initwithjson(self.jsonreceived)         self.presentviewcontroller(controllervc, animated: true, completion: nil)     } 

view 2 view 3: (connected in visual part of storyboard (ib))

@ibaction func gototablaproveedoresdeservicios(sender: uibutton) {          let controllervc = self.storyboard!.instantiateviewcontrollerwithidentifier("proveedoresdeservicios") as! tablaproveedoresdeservicios         self.presentviewcontroller(controllervc, animated: true, completion: nil)     } 

view 3 2: try every kinds of (every kinds know, not every kinds)

@ibaction func backpressed(sender: uibutton) {          navigationcontroller!.dismissviewcontrolleranimated(false, completion: nil)         navigationcontroller!.dismissviewcontrolleranimated(true, completion: nil)         navigationcontroller!.poptorootviewcontrolleranimated(true)     } 

thanks lot.

if using navigationcontroller try push view controller remains previous view in stack.

self.navigationcontroller.pushviewcontroller(controllervc, animated: true)