How does one use namespaces in iOS objective-c code?

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How does one use namespaces in iOS objective-c code?

I’m writing an iOS app, “Best Korea”. My organization name is “”. I’m going to write re-usable “News” libraries that I’ll use across my apps.

Each iOS app will have its own app-wide constants in a .h file, and the library code will have its constants as well in header files. I’ll also have tests for each of these projects.

Is this the standard way of doing things?

In Ruby, Python, Java, etc., I’d set up namespaces along these lines:


As far as I can see, the Objective-C pattern is for each developer to choose two or three upper-case letters and prefix every class name with them.

So in my case, I’m thinking I’d choose BK as the app’s classname prefix and NL for the news lib code? Am I thinking about this the right way?

EDIT: I’m considering not using namespacing at all in my application code as discussed here.

Solution :

You’re correct that Objective-C doesn’t have built in support for namespaces, and the common solution is to use uppercase prefixes on each class. Note that Apple has stated that two letter prefixes are reserved for their use, so you should use three letter prefixes for your own classes. Otherwise, your suggested approach is the normal thing to do.

There is no NameSpace in Objective-C as you are expecting in Java.

Objective-C uses class Prefix like NS, UI, CG, CF etc to safely remove name space collision.

And it would be better to use 3 letter Prefix for your class.

You should read this : What is the best way to solve an Objective-C namespace collision?