What is the plus (+) symbol in Objective-c #import instructions?

objective-c

Solution

It is just file name : `NSArray+BBNSArrayAdditions.h` but in Objective C there is a 'standard' to name categories as: class name (class you want to write category for) plus sign and your custom category name, for example;

NSString+MyCategoryName.h

Problem

For example: ``` #import "NSArray+BBNSArrayAdditions.h" ``` I've tried googling it and looking on the apple developer documentation but I can't find an explanation. A link or explanation of any other import tokens would also be useful. Thanks.

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