Then in several of the following sections you'll create the complete School data model by adding attributes to the classes you already created and creating new classes for the remaining entity types in the model.
For student enrollment dates, all of the web pages currently display the time along with the date, although all you care about for this field is the date.
By using data annotation attributes, you can make one code change that will fix the display format in every view that shows the data.
To see an example of how to do that, you'll add an attribute to the setting specifies that the formatting should also be applied when the value is displayed in a text box for editing.
However, we only showed you how to insert records into data store through Core Data API and left out the update & delete operations.
Note: If this is the first time you learn about Core Data, we recommend you to read the first tutorial.
Add the following code to the Device View Controller.m: - (BOOL)table View:(UITable View *)table View can Edit Row At Index Path:(NSIndex Path *)index Path - (void)table View:(UITable View *)table View commit Editing Style:(UITable View Cell Editing Style)editing Style for Row At Index Path:(NSIndex Path *)index Path We’ll not go into the details about how to remove a row from table view as we’ve already covered in our earlier tutorial.In your project navigator select the .xcdatamodeld container in which the 2 versions reside.Open the Utilities pane on the left and select the File Inspector.For information about the tutorial series, see the first tutorial in the series.In the previous tutorials, you worked with a simple data model that was composed of three entities.