Tutorial: A Guide To Objective-C Attribute Directives And A Listing Of The Most Useful Ones

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Earlier this month I mentioned a tutorial on using compiler directives to create useful warnings and error messages that mentions the unused attribute which can be used to generate warnings when a variable is unused.

There are many other attribute directives available in Objective-C and the engineering team has put together a nice guide to using the attribute directive in Objective-C.

The post goes in-depth with error directives providing:

an explanation of the attribute directive and why you’d use it
a listing of many useful attribute directives and how and when to use them
Some of the dangers that can arise when using the attribute directive and how to avoid them

You can find the tutorial over on the Twitter Engineering Blog.

A very nice guide to attribute directives that provides a nice alternative that provides a nice read when compared to the highly technical compiler documentation available on the attribute directive.


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