How to work with 2 ViewController(s)?

Question

iOS

I created 2 ViewControllerA and on the 1st I made a button, on the second a label. I wanted to make it so that when you click on the button in the label, a text prepared in advance appears, but when I entered the VievControllerA class, this class wanted to interact only with the first view controller, I don’t know what to do. I searched for a long time, but I could not find it, I hope for you. ?

Answer 1

I don't know what you were looking for.
https://www.youtube.com/watch?v=7fbTHFH3tl4