只需使用[self class]！当您在Objective-C中调用类方法时，self将指示正在调用哪个类.例如:

Just use [self class]! When you call a class method in Objective-C, self will indicate which class is calling. For example:

#import <Foundation/Foundation.h>
#import <stdio.h>

@interface A: NSObject
+ (void)foo;
@end

@implementation A
+ (void)foo {
  printf("%s called!", [[[self class] description] UTF8String]);
}
@end

@interface B: A @end
@implementation B @end

int main()
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    [A foo];
    [B foo];
    [pool release];
    return 0;
}

应打印

A called!
B called!