I have a view with an Edit button on the right and a Back button on the left. When the user hits the Edit to enter the edit mode, I replace the back button with an Add button.
All works great up to this point.
I can’t figure out how to display the Back button back again after the Edit button is hit to leave edit mode.
When you replace your back button with the add button, I suggest you save the old button so that you can replace it.
If you are using a navigation bar, it might be better to put your add button on the right; as a user will expect the back button to remain where it is.