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iOS Build a Simple iPhone App (iOS7) Refactoring into a Model Readonly Attribute

Soojin Ro
Soojin Ro
13,331 Points
Posted by Soojin Ro
Soojin Ro
13,331 Points

Why do we use @class?

Amit says "It's not a good practice to import in local interface". Why? What's the difference between importing in .h file and .m file?

1 Answer

Amit Bijlani
STAFF
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Header files (or .h files) are a quick way of instructing a compiler the basic structure of your app. The compiler gets an understanding of the classes and frameworks needed by your app. If you import a local header file inside another header files then it creates unnecessary overhead. With a small application you will not notice much difference but as you application grows so will your compile time. Keeping in mind this basic rule will help you when creating a real world application.