What's the deffierence between 'isKindOfClass' and 'isMemberOfClass'?

[[NSMutableData data] isKindOfClass:[NSData class]]; // YES

[[NSMutableData data] isMemberOfClass:[NSData class]]; // NO

 

isKindOfClass: Returns a Boolean value that indicates whether the receiver is an instance of given class or an instance of any class that inherits from that class.

 

isMemberOfClass: Returns a Boolean value that indicates whether the receiver is an instance of a given class.