Unwind segue doesn't work in Swift 3 and iOS 10

Question

I\'m trying to test unwind segue in iOS 10 and Swift 3.

I made a simple app like this:

I add code for segue in TableViewController cl

Answer 1

As can be seen in the comments above the problem was this:

I add code for segue in TableViewController class

The unwind segue has to be in your "outer" ViewController, not the TableViewController.

This article gives a very nice introduction to unwind segues.