This dependence can be convenient if you are caching smaller data sets in memory.

For example, suppose the context controls a temporary set of objects that may persist beyond a single event cycle, such as a sheet in an mac OS application or a modal view in an i OS application.

Previously, we gave you a brief introduction of Core Data and created a simple app to store all your device information.

However, we only showed you how to insert records into data store through Core Data API and left out the update & delete operations.

If the save fails, it is important to display the error condition so that it can be corrected.

The display of that error condition can be as simple as outputting the error to the console or as complicated as offering the error message to the user.

In this example we will see how to use it in our i OS application.

First we will see how to create our data model and then how to perform the following basic operations: A data model consist of a group of entities.

.row] let app = UIApplication.shared Application().delegate as!

To keep the example simple our data model will have one entity with two attributes.

A Person with name and age: Person -name: “Create NSManaged Object Subclass…”.

This post is part of my collection: Swift 2 – For Beginners.

Core Data is a persistence framework provided by Apple.