Changes

The implementation of the MyDocument class is now complete and it is time to begin implementing the application functionality.

The ultimate goal of the application is to save any text in the text view to a document on the local file system of the device. When the application is launched it needs to check if the document exists and, if so, load the contents into the text view object. If, on the other hand, the document does not yet exist it will need to be created. As is usually the case, the best place to perform these tasks is the viewDidLoad method of the view controller.