24th: Spread the implementation code of the class into several categories that are manageable

category is a linguistic feature of Objective-c.

By using classification, you can add methods directly to the current class without inheriting subclasses . This feature can be supported because the OBJECTIVE-C runtime system is highly dynamic.

To split the. m File:

The basic elements of a class (such as attributes, initialization methods, and so on) are declared in the main implementation.

Performing different types of operations is categorized into individual categories.

Advantages :

Easy to manage and easy to debug.

The methods that should be considered " private " are grouped into categories called private to hide the implementation details.

24th: Spread the implementation code of the class into several categories that are manageable