@interface and @protocol explanation?

Question

I would like to know what the @interface in objective C is? is it just where the programmer want to declare the variables, class name or method names...? I am not sure wheth

Answer 1

probably good if you take a look at this + I thought it was great help to understand

From the article:

@interface

C++

Foo.h

#ifndef __FOO_H__
#define __FOO_H__
class Foo
{
...
};

Foo.cpp

#include "Foo.h"
...

Objective-C

Foo.h

@interface Foo : NSObject
{
...
}
@end

Foo.m

#import "Foo.h"

@implementation Foo
...
@end

@protocol

C++

struct MyInterface
{
  void foo() = 0;
}

class A : MyInterface
{
public:
  void override foo() { ... }
}

Objective-C

@protocol MyInterface
-(void) foo;
@end

@interface Foo : NSObject 
{
 -(void) foo {...}
...
}
@end