Editing an Existing Managed Object
On the Movies tab in the sample app, the user can tap a movie to see more detail about it. To change any of the information about the movie, tap the Edit button in the navigation bar, which will present an instance of ICFMovieEditViewController. When the view is loaded, it will load an instance of ICFMovie using the objectID passed in from the display view or list view, will save that instance into the property editMovie, and will configure the view using information from the movie managed object.
If the user decides to edit the year of the movie, for example, another view controller will be presented with a UIPickerView for the user to select a new year. The ICFMovieEditViewController is set up as a delegate ...
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