How can I detect when a card is being flipped?

[Sweeper777]

I am writing an app where the user can write notes on the back of the cards. I am using a database to store the notes, so I need to update the values in the database when the card gets flipped back (i.e. the user ends editing).

I tried to look for a delegate method called willFlipCard or something like that, but realised that there is no such method. I tried doing the update in willUnrevealCard but apparently by the time that is called, it is too late. The text view instance is already gone.

How can I do something just before the card gets flipped back?