Here are a few additional iPad developer job interview issues which you could request to evaluate a developer’s caliber.
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a technique (from its superclass) by sending respondsToSelector: to the object utilizing the super search phrase. Sending respondsToSelector: to super is comparable to sending it to self. Rather, you need to utilize the instancesRespondToSelector: approach on the object’s superclass, such as:
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Concurrency indicates two or even more duties are outlined independently. 3 ways to accomplish concurrency in iOS are - Threads, Dispatch queues and Operation queues.
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Just after enabling NSZombies, you are able to then observe what is occurring inside your code and get a information when the appliance tries to entry an item which has been produced, thus identifying the issue with your code. A Observe of caution though: Be sure to make sure to disable
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Have in mind, even though, that variations to Core Information objects will not automatically propagate right away to other threads. During the normal scenario, Main Information objects which are loaded into memory usually are not up-to-date on another thread until Individuals objects are fetched yet again from persistent storage.
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