To ensure that a managed item context to absorb changes from Main Details objects on An additional thread quickly, it should be observing the NSManagedObjectContextDidSaveNotification. After this notification occurs, the item can merge the adjustments using the mergeChangesFromContextDidSaveNotification: process.
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Have in mind, though, that improvements to Core Info objects usually do not necessarily propagate instantly to other threads. From the typical case, Main Info objects which might be loaded into memory are certainly not up to date on another thread right until Individuals objects are fetched once more from persistent storage.
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. When an object is in use by another object it’s retain count goes up; when It isn't getting used by any objects, its retain rely reverts to zero.
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Q: What is a selector and what's its goal? Offer an illustration of the place And exactly how it'd be applied.
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A category is a means to extend an existing course and is also a substitute for the use of subclasses. The principle difference in between subclassing and classes is usually that a class adds performance to an current course itself which can be then readily available anywhere with your code that uses that course or its subclasses.