What are all the difference between categories and subclasses in iOS operating s

What are all the difference between categories and subclasses in iOS operating system?

Question Posted / mohd suhail

What are all the difference between categories and subclasses in iOS operating system?..

Answer / Asad Ali

Categories and Subclasses are two ways to extend or modify the behavior of existing classes in iOS. The main differences are as follows:
1. Subclass: A subclass is a new class that inherits properties and methods from an existing class, and can override those methods. It creates a new entity with its own identity.
2. Category: A category adds methods to an existing class without creating a new subclass. It doesn't create a new entity but extends the functionality of an existing class. Methods added through categories are compiled into the same binary as the original class, but they don't have their own instance variables.

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