. When an object is in use by another object it’s retain count goes up; when it is not being used by any objects, its retain count reverts to zero.
NSZombies before submitting the app to the App Store. When NSZombies is enabled, no objects are released and you will be leaking memory constantly until your app eventually is killed due to memory warnings.
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It’s important to note here that in addition to the “strange” square braces to send a message, to the uninformed eye, Objective-C appears
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Keep in mind, though, that changes to Core Data objects do not necessarily propagate immediately to other threads. In the standard case, Core Data objects that are loaded into memory are not updated on a different thread until those objects are fetched again from persistent storage.
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A great example of delegation is the UITableView object that is typically used when check here a table is rendered on the screen. The UITableView employs two different delegates:
However, since data binding adds logic to UI files, it Perro make debugging and testing tricky, and not all developers support this approach. Candidates should be able to describe the core functionalities, advantages, and drawbacks of data binding and how to use it in an Android app.