Protocols with Navigation Controller

I have a project where I have set up a protocol to pass information back from one TableViewController to a ViewController. Everything worked fine and as expected, but I decided to embed in a Navigation Controller to the TableViewController so I could add a "DONE" barButtonItem to dismiss the Controller when the user is done. Since embedding in the navigation controller, the button works well, the TablieViewController looks identical, but none of its features and methods that use the Protocol and Delegate work, and if I remove the NavigationController everything works. Could someone explain how I can fix this issue? I am fairly new to iOS and objective c.