Parent/Child context model for using
Core Data with
multithreading, when should you be calling the
Should they be called only when saving the changes from the
Child context to the
Parent context? Thus, after you have already made the changes to the Core Data records (in the child context)?
Or would you call
performBlock while you are doing the actual changes to the Core Data records? As well as when saving the changes to the child then parent contexts?