iOS Copy

//遵守Copying, MutableCopying协议@interface Person : NSObject <NSCopying， NSMutableCopying>@property (nonatomic, copy) NSString *name;@end@implementation Person//实现方法- (id)copyWithZone:(NSZone *)zone{    Person *p = [[[self class] allocWithZone:zone] init];        p.name = self.name;        return p;}- (id)mutableCopyWithZone:(NSZone *)zone{    Person *p = [[[self class] allocWithZone:zone] init];        p.name = self.name;        return p;}@end