ios - Access Variables of ViewController Before Popping To It -

i have home button triggers code when pressed. need change variable within viewcontroller popping before pop it. there way this?

func gohome(){          let switchviewcontroller = self.navigationcontroller?.viewcontrollers[1] as! uiviewcontroller         self.navigationcontroller?.poptoviewcontroller(switchviewcontroller, animated: true)      } 

this how thought go no variables of viewcontroller appear in autocomplete window.

switchviewcontroller.x = 5 

any information on how go and/or why isn't working appreciated.

you're setting switchviewcontroller generic uiviewcontroller, has no variable .x.

you should set correct class, in case whatever named class has 'x' variable:

let switchviewcontroller = self.navigationcontroller?.viewcontrollers[1] as! switchviewcontroller switchviewcontroller.x = 5 

in case i've used class name switchviewcontroller, means you'd need .swift class file so:

import uikit  class switchviewcontroller: uiviewcontroller {      var x: int!      override func viewdidload() {         super.viewdidload()     }      override func didreceivememorywarning() {         super.didreceivememorywarning()     } }