Right now, all you have to do is modify your root element as you wish, and then call the reloadData on the tableView. That will show the new table automatically, although it won't show a nice animation that somebody would expect. Adding this functionality is in my todo list, and should be fairly simple to do.

What you're saying though is not really related to adding/removing cells. I'm not saying you shouldn't create UIViewControllers for specific things, actually its quite the oposite, I think you should have as many controllers as possible, so that they're really small. Funny your example is a login screen, bcse that's the example in my samples on the project. Take a look at the code: it's very simple, and it mostly has to do with the actions that will happen as a result of the form, instead of cell creation: https://github.com/escoz/QuickDialog/blob/master/sample/Logi...

I see this as a much cleaner approach to do exactly the same thing, with the benefit that a lot of the code can be reusable. As a developer, you can spend a lot less time implementing plumbing code to get the cells and fields displayed, and instead focus on how they're used.