The Interface File (.h)

The interface file (.h) of a class holds a list of all of the instance variables and methods.

Example 1:

#import <UIKit/UIKit.h>

@interface MyClassName
    {
     // instance variables go here
     IBOutlet UITextField *theText;
     int x;
     double z;
    }
    
     // method headers go here
    -(IBAction) respondToTap:(id) sender;
    -(void) convertTemperature;
@end



Example 2:
#import <UIKit/UIKit.h>

@interface MyClassName : UIImageView
    {
     // instance variables go here
     NSString *image;
     float x;
     float y;
    }
    
     // method headers go here
@end