swift - Change cell title in TableViewController in another ViewController -

i'm trying change title in tableviewcontroller viewcontroller. (see image)

the second viewcontroller 1 3 cells , third 1 one textfield (inputtext in code), button (changetext) , label (outputlabel). app remember put in text field when go table view , viewcontroller. happens is:
- change text, hit button , label changes.
- go tableviewcontroller , go viewcontroller in changed label
- label before...

how can make app 'remember' put in in text field , label like? code (viewcontroller.swift, linked 3rd controller file, haven't linked 2nd controller (yet?)):

import uikit  class viewcontroller: uiviewcontroller {  @iboutlet weak var outputlabel: uilabel! @iboutlet weak var inputtext: uitextfield! @ibaction func changetext(_ sender: uibutton) {     outputlabel.text = inputtext.text }  override func viewdidload() {     super.viewdidload()      // additional setup after loading view. }  override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. } 

thanks in advance!

you can reference viewcontroller in first controller (tableviewcontroller), make public inputtext

@iboutlet public  weak var inputtext: uitextfield! 

and in viewdidappear text

override func viewdidappear(_ animated: bool) {     super.viewdidappear(animated)     let text = viewcontrollervar.inputtext.text //your text }