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Core Data Fundamentals

Exploring the NSFetchedResultsControllerDelegate Protocol

by Bart Jacobs | Nov 19, 2017 | Core Data

Swift 4 Xcode 9 iOS 11

Core Data Fundamentals

1	Welcome to Core Data Fundamentals 03:08
2	What Is Core Data 05:08
3	Building Notes 01:49
4	Exploring the Core Data Stack 06:46
5	Creating the Project Plus 01:06
6	Setting Up the Core Data Stack Plus 08:31
7	Core Data and Dependency Injection Plus 03:13
8	Data Model, Entities, and Attributes Plus 05:39
9	Data Model, Entities, and Relationships Plus 06:36
10	Configuring Relationships Plus 06:41
11	Working With Managed Objects Plus 08:44
12	Subclassing NSManagedObject Plus 03:53
13	Adding a Note Plus 04:00
14	Don't Forget to Save Plus 03:17
15	Fetch Those Notes 08:22
16	Fix That Mistake Plus 08:32
17	To the Trash Can Plus 01:38
18	Introducing the Fetched Results Controller Plus 07:03
19	Exploring the NSFetchedResultsControllerDelegate Protocol Plus 06:13
20	Adding Categories to the Mix Plus 08:16
21	Adding a Dash of Color Plus 06:17
22	Data Model Migrations 06:43
23	Versioning the Data Model Plus 06:54
24	Assigning Tags to a Note Plus 07:03
25	Working In a Multithreaded Environment Plus 08:37
26	Updating the Core Data Manager for Concurrency Plus 07:13
27	Using a Better Core Data Stack Plus 01:10
28	Replacing the Core Data Manager Class Plus 10:21
29	Understanding Faulting Plus 08:01
30	Where to Go From Here Plus 04:27

To update the table view, we listened for notifications sent by the managed object context of the Core Data manager. This is a perfectly fine solution. But it can be messy to sift through the managed objects contained in the userInfo dictionary of the notification. In a complex Core Data application, the NSManagedObjectContextObjectsDidChange notification is sent very frequently. It includes every change of every managed object, even the ones we may not be interested in. We need to make sure we only respond to the changes of the managed objects we are interested in.

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