copy与mutableCopy

一、对系统自带类的copy与mutableCopy

总结：

	是否深度拷贝
imutable的copy	否
imutable的mutableCopy	是
mutable的copy	是
mutable的mutableCopy	是

对NSString

	地址	类	是否深度拷贝
str	0x100003088	__NSCFConstantString
str Copy	0x100003088	__NSCFConstantString	否
str MutableCopy	0x100102f60	__NSCFString	是

对NSMutableString

	地址	类	是否深度拷贝
mutableStr	0x100100910	__NSCFString
mutableStr Copy	0x100400240	NSTaggedPointerString	是
mutableStr MutableCopy	0x100400440	__NSCFString	是

对NSArray

	地址	类	是否深度拷贝
array	0x100400960	__NSArrayI
array Copy	0x100400960	__NSArrayI	否
array MutableCopy	0x100400f30	__NSArrayM	是

对NSMutableArray

	地址	类	是否深度拷贝
mutableArray	0x100100280	__NSArrayM
mutableArray Copy	0x100100370	__NSArrayI	是
mutableArray MutableCopy	0x100106060	__NSArrayM	是

对NSDictionary

	地址	类	是否深度拷贝
dictionary	0x100106be0	__NSDictionaryI
dictionary Copy	0x100106be0	__NSDictionaryI	否
dictionary MutableCopy	0x100106d90	__NSDictionaryM		是

对NSMutableDictionary

	地址	类	是否深度拷贝
mutableDictionary	0x100503470	__NSDictionaryM
mutableDictionary Copy	0x1005038d0	__NSDictionaryI	是
mutableDictionary MutableCopy	0x100503910	__NSDictionaryM	是

对NSSet

	地址	类	是否深度拷贝
set	0x1003039c0	__NSSetI
set Copy	0x1003039c0	__NSSetI	否
mutableSetMutableCopy	0x100303c20	__NSSetM	是

对NSMutableSet

	地址	类	是否深度拷贝
set	0x103000140	__NSSetM
set Copy	0x100202680	__NSSetI	是
mutableSetMutableCopy	0x100202b50	__NSSetM	是

二、自定义类的copy与mutableCopy

// Person.h

typedef NS_ENUM(NSInteger,PersonSex) {
    PersonSexMan,
    PersonSexWomen
};

@interface Person : NSObject
@property (nonatomic,copy,readonly) NSString *name;
@property (nonatomic,assign) NSInteger age;
@property (nonatomic,assign)  PersonSex sex;


- (instancetype)initWithName:(NSString *)name age:(NSInteger)age sex:(PersonSex)sex;
+ (instancetype)personWithName:(NSString *)name age:(NSInteger)age sex:(PersonSex)sex;

// Person.m

@implementation Person
- (instancetype)initWithName:(NSString *)name age:(NSInteger)age sex:(PersonSex)sex{
    if (self = [super init]) {
        _name = [name copy];
        _age = age;
        _sex = sex;
    }
    return self;
}

+ (instancetype)personWithName:(NSString *)name age:(NSInteger)age sex:(PersonSex)sex{
    return [[self alloc]initWithName:name age:age sex:sex];
}`
- (id)copyWithZone:(NSZone *)zone{
    Person *person = [[[self class] allocWithZone:zone] initWithName:_name age:_age sex:_sex];
    return person;
}
- (id)mutableCopyWithZone:(NSZone *)zone{
    Person *person = [[[self class] allocWithZone:zone] initWithName:_name age:_age sex:_sex];
    return person;
}
@end

对person进行copy和mutableCopy

        Person *person = [[Person alloc] initWithName:@"hao" age:23 sex:PersonSexMan];
        Person *personCopy = [person copy];
        Person *personMutableCopy = [person mutableCopy];
        
        NSLog(@"person: %p",person);
        NSLog(@"personCopy: %p",personCopy);
        NSLog(@"personMutableCopy: %p",personMutableCopy);

输出：

person: 0103200050
personCopy: 0x103200140
personMutableCopy: 0x103200200

copy与mutableCopy都进行了深拷贝。