companyontheworld/coredatamultiplecontexts

A sample project showing how to use multiple contexts in a Core Data application.

CoreDataMultipleContexts

A sample project showing how to use multiple contexts in a Core Data application.

This example shows how to do these things:

• Create a private writer context, which sits above all other contexts, and performs effective background saving.
• Create a main queue context, which is used by the UI for display (but not edit) purposes.
• Create a temporary context from the main queue context, and add an object.
• Save this temporary context, and see the changes trickle up.

When doing this, all saves, fetches, etc. should be performed in a performBlock or performBlockAndWait call to ensure the operations happen on the correct queues.

See [http://www.cocoanetics.com/2012/07/multi-context-coredata/](Multi-Context CoreData) for more information on this technique, but beware their typos.