A standard explanation for exc_bad_access errors that are not detectable by the compiler is aiming to obtain introduced objects. In this sort of situations, enabling NSZombies in Xcode is often an effective debugging system. Enabling NSZombies keeps objects that will Usually be introduced alive as “zombies”.

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In addition to NSError, iOS enhancement also has NSException. Contrary to exceptions in other languages, NSException is intended for use for programming glitches only. Cocoa frameworks generally speaking will not be exception-safe, so in the event you make (or invoke code that generates) exceptions, care must be taken to employ test/capture as close as possible towards the area in which the exception is going on. In apply, NSException is never used in iOS codebases.

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Main Facts will not be hire ipad programmers thread Risk-free. The strategy for that reason proposed by Apple is to employ thread containment which involves developing a individually-managed item context for accessing Core Data objects on Each and every thread and aquiring a one shared persistent keep coordinator.

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