I had a hard time following the accepted answer so here is more detail.

Given the photo below on view controller C you can "exit" back to any view controller in the segue path.

enter image description here

ViewController A you can write:

- (IBAction)done:(UIStoryboardSegue *)segue {
    // Optional place to read data from closing controller
}

ViewController B you can write:

- (IBAction)back:(UIStoryboardSegue *)segue {
    // Optional place to read data from closing controller
}

ViewController C you control drag from "back" button to the green exit option and select back: ViewController C you control drag from "done" button to the green exit option and select done: enter image description here

Note: Even though the methods are on other view controllers they show up for the ViewController C 's exit. Control dragging and selecting a method defines which ViewController to unwind to.