objective c - How to determine whether class B is a subclass of class A? -

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It seems that if you develop for Mac OS, then NSObject in SubclassOfClass method but when I check the reference of the IOS class for the same class, there is no way in it (and complains about the Xcode method).

My current solution is to put a method - (zero) iAmClassB there, and execute a responses: iAmClassB , but it sounds like a contractor is. Am I missing something?

This is the version of iOS 2.0 and later SDK 

  if ([ Classby Hashbys of Class: [Classes Class]]) {NSLog ("Yes Class of Class" is class of sub-class "); }   
:  
 
   isSubclassOfClass:    
 returns a Boolean value It indicates that the received class is similar to the subclass or same class of a given class.       
  / P> 
 A class object.  
  Return value   
  Yes  If the received class is a subclass or is similar, then  aclass , Otherwise  not .  
  Availability   
 Available in iOS 2.0 and later.

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