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Core Data in Objective-C, 3rd Edition
book

Core Data in Objective-C, 3rd Edition

by Marcus S. Zarra
June 2016
Beginner to intermediate content levelBeginner to intermediate
240 pages
6h 17m
English
Pragmatic Bookshelf
Content preview from Core Data in Objective-C, 3rd Edition

Interqueue Communication

Since objects created with or retrieved from a context can only be accessed on the queue associated with that context, the challenge becomes passing references to those objects between queues. This is arguably the biggest area where multiple threads with Core Data cause people the most issues.

If a reference to an object must be passed between queues, the best way to handle that hand-off is via the object’s -objectID property. This property is designed to be safe to access from multiple queues and is a unique identifier to the object.

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Publisher Resources

ISBN: 9781680502022Errata Page