What is the concept of Inheritance in Objective-C? -

I'm new to Objective-C and want to know about heritage. I know about the concepts, but are confused by the ways in which the programmer uses the heirs of a class.

I have two classes: Class A and Class B, and B. want to make a child of A.

Sometimes the programmer uses the #import "class A" and sometimes uses the @ sign, which of which use Should be done and why? Is there any difference in their experiments?

I have another question about ": " which we write after the class declaration, for example @interface class_A: class_name

In the past, I was a student of Java and C #, and their heritage is similar to each other but what purpose-C (I am currently working for the iPhone) is the same?

There is a difference in those words, and I can see where your confusion is.

#import is used to load the definition of class H file. It is, in a way, to use the keyword of C #, but the objective is similar to C, we do not need to specify everything at the level of the class, rather than at the namespace level - namespace level There is no concept of encapsulation, Objective-C

Any time you need to declare that an object is valid - the keyword @class is used - but if you are going to use the interior of that object Ultimately, a class of #import should be added here.

With C # and Java, the heir is obtained using the operator in your H file. So in the declaration of class B, it should go:

  @interface Class_B: Class_A  

Hope it clears everything.

Update your comment:

Suppose I want to make the successor of Class B in Class B, and anywhere in the form of a C I want to use Class C You will need FF to work on it:

  #import "Class_A.h" @ class square_C; @ Interface class_b: class_a {class_c * heavy}} Now, let's say somewhere inside your file, which you can access to classgong members like  myvariable.Property1  You need to turn on "class_C.h"  when you change  @ class Class_C  to  #import.  
 I do not seem to declare it like this:  
  @ square class_a; @ Interface class_b: class_a  
 
 will work ... you will still need to  #import "Class_A.h" , which makes the class  @  Declaration is something unnecessary.