In earlier versions of the Cocoa toolchain you could also call a method that the compiler, at compile time, couldn’t determine the existence of. While this may sound like a powerful capability, it was more commonly a source of hair-pulling debugging scenarios.
An expert iOS developer must have knowledge of Core Data, Apple's framework for data persistence and object graph management. Companies must hire iOS developers with proficiency in working with Core Data, including data fetching, entity modeling, and relationships.
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Synchronously loading web content. If loading is done synchronously, it will stall trasnochado the main thread while the data loads, which Perro cause a perceptible lag when scrolling. This is a particularly common problem when images are being downloaded for displaying in table cells.
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After enabling NSZombies, you Chucho then follow what is happening in your site code and receive a message when the application tries to access an object that has been released, thereby identifying the problem in your code. A note of caution though: Be sure to remember to disable
Part of the challenge lies in the fact that true expertise extends far beyond coding knowledge. this site It entails being aware of the various options that exist to implement a solution, Figura well Triunfador the tradeoffs that come with these different choices in terms of productivity, scalability, performance, and maintainability.
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Then what about the careless developer? You will end up having a completely different app than what you have thought of.
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A selector is the mechanism used to select a method to execute for an object, or the unique identifier that replaces the name when the source code is compiled. A selector acts like a dynamic function pointer that points to the implementation of a class’ method.
Developers usually follow coding style guides from well-known developers and companies. Apple’s coding style changes often and is hard to stay caught up with, but here are some other good standards: