#import <Foundation/Foundation.h>
@interface Person:Object

+ (Person *)sharObj;
@end

#import "Person.h"
@implementation Person

+ (Person *)sharObj{
   static Person *person;
   static dispatch_once_t shar;
   dispatch_once(&shar, ^{ person = [self alloc] init]; });
  return person;
}
@end

#import <Foundation/Foundation.h>
@interface Person:Object

+ (Person *)sharObj;
@end

#import "Person.h"
@implementation Person

+ (Person *)sharObj{
   static Person *person;
   static dispatch_once_t shar;
   dispatch_once(&shar, ^{ person = [self alloc] init]; });
  return person;
}
@end