Some are designed for you to customize with your own code to behave in the way you require. Some of these objects are immediately usable, such as basic data types like strings and numbers, or user interface elements like buttons and table views. For OS X or iOS development, you don’t need to create objects from scratch to solve every conceivable problem instead you have a large library of existing objects available for your use, provided by Cocoa (for OS X) and Cocoa Touch (for iOS). Objects in Objective-C are just like objects in other object-oriented programming languages: they package data with related behavior.Īn app is built as a large ecosystem of interconnected objects that communicate with each other to solve specific problems, such as displaying a visual interface, responding to user input, or storing information. When you write software for OS X or iOS, most of your time is spent working with objects.
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