How can the current Uiviewcontroller know which "Called" button?

Question

I have a doubt and the scenario of the question is as follows:

I am on the main screen of my app and have 2 buttons (UIButton), each takes to another screen.

After the user has chosen a button and the new screen appears, in case a new UIViewController, the new current screen, which is another UIViewController, would you know which button on the previous screen made the call? That is, there is a way to know which of the two buttons made the push or modal transiction... now in Xcode 6 is called show?

I believe using UINavigationController may have a way of knowing, but someone knows exactly how to do it?

In case the question has become confused or complex just let me know that I can try to explain otherwise.

Answer 1

The @Paulorodrigues helped me a lot with your reply to another question, and still answered this. I will leave the link to anyone with the same problem.

Link to Reply: Determine content to fill Uitableview based on a Uibutton tag