What is the difference between #import and #include in Objective-C?

Question

What are the differences between #import and #include in Objective-C and are there times where you should use one over the other? Is one deprecated?

I was reading th

Answer 1

I agree with Jason.

I got caught out doing this:

#import   // to use gettimeofday() function
#import       // to use time() function

For GNU gcc, it kept complaining that time() function was not defined.

So then I changed #import to #include and all went ok.

Reason:

You #import :
     includes only a part of by using #defines

You #import :
    No go. Even though only part of was already included, as
    far as #import is concerned, that file is now already completely included.

Bottom line:

C/C++ headers traditionally includes parts of other include files.
So for C/C++ headers, use #include.
For objc/objc++ headers, use #import.