Passing data back and forth between VCs?

Question

iOS

Could you help with the transfer of data back. There is a Navigation Controller, I want that when a button is pressed on 2 VC, a transition is made, and text is displayed on 1. I read the article ( https://swiftbook.ru/post/tutorials/pass-data/#pas... but I didn't understand why the button on the first VC is needed. In short. Need help!

Answer 1

The button is needed to initiate the transition to the next. controller. To pass data between two controllers you need to split the task into passing it to the new controller, and displaying the new data in the second controller. Which of the two subtasks is the problem?
I see you are a complete beginner, here it is not customary to write questions in the spirit of "I don't know what the problem is, and in general, do it, I'll figure it out." State the problem , show what you did and what behavior you expected.
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