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Classes

A new class is declared with the @interface directive. The interface file for its superclass must be imported:

#import "ItsSuperclass.h"

@interface ClassName : ItsSuperclass < protocol_list >

{

    instance variable declarations

}

method declarations

@end

Everything but the compiler directives and class name is optional. If the colon and superclass name are omitted, the class is declared to be a new root class. If any protocols are listed, the header files where they’re declared must also be imported.

A file containing a class definition imports its own interface:

#import "ClassName.h"

@implementation ClassName

method definitions

@end

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