Objective-C Fundamentals

Summary
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and its ease of use and visual nature permitting exploration and interpretation of captured
data is unrivaled.
Debugging applications that you’ve deployed via the iTunes App Store requires
additional forethought if you want to maximize your ability to diagnose crashes that
you yourself can’t replicate. At a minimum, you should archive a copy of your source
code and debugging symbols (*.dsym files) for each update of the application you
submit. Doing so increases your chances of being able to quickly zero in on probable
causes of crashes that occur “out in the wild.”