To ensure that a managed object context to soak up changes from Core Information objects on Yet another thread instantly, it should be observing the NSManagedObjectContextDidSaveNotification. As soon as this notification occurs, the item can merge the modifications using the mergeChangesFromContextDidSaveNotification: system.
Understanding of databases is often considered being a pivotal prerequisite for software developers. The database is used to retail store, obtain and manipulate facts.
Bear in mind, nevertheless, that changes to Core Details objects never automatically propagate immediately to other threads. While in the standard situation, Main Knowledge objects that are loaded into memory are certainly not up to date on another thread until finally All those objects are fetched once again from persistent storage.
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In addition to NSError, iOS growth also has NSException. Unlike exceptions in other languages, NSException is intended to be used for programming errors only. Cocoa frameworks generally speaking usually are not exception-Harmless, so when you create (or invoke code that generates) exceptions, treatment needs to be taken to make use of try/capture as close as feasible towards the location where the exception is happening. In apply, NSException is never Employed in iOS codebases.
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NSError objects have an mistake domain, an error code, and person information dictionary For extra info. This extra info may possibly involve, for example, a localized description and recovery recommendation, so afterwards code can Screen that into the person.
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