Here is the layout for a header (interface) file. For this example, we will assume that the name of your class is Foo.
//First put in any import statements
// Then forward-declare any non-Cocoa classes // (Except those being inherited from) // (See AdviceOnImportingHeaders)
// Next, put in this line which declares the name of the class // and gives the name of the superclass it derives from. In this // case the name of the class is Foo and the name of the // superclass is NSObject.
@interface Foo: NSObject
// Next, in braces, declare your instance variables and your outlets.
NSMutableArray foo; NSString *personName; float expectedRaise; BossMan bossApprovingRaise;
IBOutlet id textField; IBOutlet id customView; IBOutlet NSTextField *staticText; }
// Next, declare your actions…
// and your instance methods.
// Last, end your header with the following line…
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For how to use forward declarations in a header file see AdviceOnImportingHeaders (you should not need to import header files directly into your header file except for importing the requisite super-class header). In the case of category headers, you need to import the header for the class on which you are adding the category.
forward-declaring your class names via the @class declaration is far-preferable when you need a reference to them in a header file.