. When an item is in use by another item it’s retain count goes up; when It's not necessarily getting used by any objects, its keep count reverts to zero.
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A common cause of exc_bad_access faults that aren't detectable from the compiler is aiming to entry introduced objects. In these scenarios, enabling NSZombies in Xcode is usually an efficient debugging procedure. Enabling NSZombies keeps objects that could Commonly be produced alive as “zombies”.
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To ensure that a managed object context to absorb changes from Core Data objects on A different thread promptly, it ought to be observing the NSManagedObjectContextDidSaveNotification. As soon as this notification happens, the thing can merge the improvements utilizing the mergeChangesFromContextDidSaveNotification: technique.
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Get the job done with all your new iOS developer for a demo interval (pay back provided that contented), guaranteeing they're the correct in shape before starting the engagement.
This manual provides a sampling of efficient issues to aid Consider the breadth and depth of the candidate's mastery on the iOS platform.