isKindOfClass,isMemberOfClassの違い

この2つの方法はよく私たちを困惑させますが、どんな違いがありますか?

定義＃テイギ＃

まず、それらの定義を見てみましょう.
isKindOfClass:
公式解釈: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:
公式解釈:Returns a Boolean value that indicates whether the receiver is an instance of a given class.

使用

の使用については、ネット上でイメージ的な例を見て、ここで直接使ってみました.
NSObjectに引き継がれたPerson,PersonのTeacherの2つのクラスがある

#import <Foundation/Foundation.h>   
  
@interface Person : NSObject  
{  
    NSString *name;  
}  
-(void)setName:(NSString*)n;  
  
@end  

 
#import "Person.h"   
  
@implementation Person  
-(void)setName:(NSString *)n  
{  
    name = n;  
}  
  
@end  

#import "Person.h"   
  
@interface Teacher : Person  
  
-(void)teach;  
  
@end  
 
#import "Teacher.h"   
  
@implementation Teacher  
-(void)teach  
{  
    NSLog(@" ");  
}  
@end  

isKindOfClassを使用する例:

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];  
Person *person = [[Person alloc] init];  
Teacher *teacher = [[Teacher alloc] init];  
  
//YES   
if ([teacher isKindOfClass:[Teacher class]]) {  
    NSLog(@"teacher   Teacher Teacher ");  
}  
//YES   
if ([teacher isKindOfClass:[Person class]]) {  
    NSLog(@"teacher   Person Person ");  
}  
//YES   
if ([teacher isKindOfClass:[NSObject class]]) {  
    NSLog(@"teacher   NSObject NSObject ");  
}  
[person release];  
[teacher release];  
[pool release];  

出力結果:

2012-07-04 14:34:17.315 ObjectiveCTest[2595:f803] teacher   Teacher Teacher 

2012-07-04 14:34:17.316 ObjectiveCTest[2595:f803] teacher   Person Person 

2012-07-04 14:34:17.316 ObjectiveCTest[2595:f803] teacher   NSObject NSObject 

isMemberOfClassを使用する例:

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];  
   Person *person = [[Person alloc] init];  
   Teacher *teacher = [[Teacher alloc] init];  
     
   //YES   
   if ([teacher isMemberOfClass:[Teacher class]]) {  
        NSLog(@"teacher Teacher ");  
   }  
   //NO   
   if ([teacher isMemberOfClass:[Person class]]) {  
       NSLog(@"teacher Person ");  
   }  
   //NO   
   if ([teacher isMemberOfClass:[NSObject class]]) {  
       NSLog(@"teacher NSObject ");  
   }  
   [person release];  
   [teacher release];  
   [pool release];  

出力結果:

2012-07-04 14:23:07.965 ObjectiveCTest[2460:f803] teacher Teacher 

この二つの例を見れば分かるはずだ.