.h
#import <Foundation/Foundation.h>
@interface Person : NSObject<NSCopying>
@property (nonatomic, assign) NSInteger age;
@property (nonatomic, copy) NSString *name;
@end
.m
#import "Person.h"
@implementation Person
- (id)copyWithZone:(NSZone *)zone {
Person *person = [[[self class] allocWithZone:zone] init];
person.age = self.age;
person.name = self.name;
return person;
}
@end
调用
Person *person = [[Person alloc] init];
person.age = 10;
person.name = @"name";
Person *person1 = [person copy];
person1.age = 11;
person1.name = @"name1";
NSLog(@"person.age==%ld", person.age);//person.age==10
NSLog(@"person.name==%@", person.name);//person.name==name
NSLog(@"person1.age==%ld", person1.age);//person1.age==11
NSLog(@"person1.name==%@", person1.name);//person1.name==name1
