Pass Data from last ViewController to root ViewController

Question

I have 3 ViewControllers, A, B and C. My navigation stack is like A -> B and B-> C. Now I want to pass data back to controller A from Controller C. Is there any way to send data directly from ViewController C to ViewController A?

Thanks in advance

Use Notification Center. Or else find the view controller from navigation stack — Raja Kishan, May 21 '21 at 11:02
Does this answer your question? [Passing data between view controllers](https://stackoverflow.com/questions/5210535/passing-data-between-view-controllers) — El Tomato, May 21 '21 at 11:19
Feel free to run a search and find a topic that could answer your question. @FahadNazir — El Tomato, May 21 '21 at 11:58

score 0 · Accepted Answer · answered May 21 '21 at 14:24

For navigation stack , Your scenario is A->B->C so stack is [A,B,C] . You can reach expected ViewController with using

 let viewControllerA = self.navigationController!.viewControllers[0] as! AViewController // 0 is viewcontroller index which in stack.

then when you want to send data to this vc or changing some data in this vc you can reach it with

viewControllerA.changingVariable = "bla bla"

Pass Data from last ViewController to root ViewController

1 Answers1