Objective-C 对象深拷贝的另外一种方式

最新推荐文章于 2020-10-21 15:21:08 发布

_xuyanshan_

最新推荐文章于 2020-10-21 15:21:08 发布

阅读量497

点赞数

分类专栏：移动开发文章标签：深拷贝拷贝 copy NSCopy deepCopy

本文链接：https://blog.youkuaiyun.com/xuhen/article/details/81408364

版权

移动开发专栏收录该内容

9 篇文章

订阅专栏

1、NSObject+DeepCopy.h

//
//  NSObject+DeepCopy.h
//  xxx
//
//  Created by xys on 2018/8/4.
//  Copyright © 2018年 001. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSObject (DeepCopy)

- (id)deepCopy;

@end

2、NSObject+DeepCopy.m

注：对自定义对象的深拷贝则需其遵循NSCoding协议。

//
//  NSObject+DeepCopy.m
//  xxx
//
//  Created by xys on 2018/8/4.
//  Copyright © 2018年 001. All rights reserved.
//

#import "NSObject+DeepCopy.h"

@implementation NSObject (DeepCopy)

- (id)deepCopy
{
    NSData * objectData = [NSKeyedArchiver archivedDataWithRootObject:self];
    if (objectData)
    {
        return [NSKeyedUnarchiver unarchiveObjectWithData:objectData];
    }
    return self;
}
@end

3、使用示例

    NSString * src = @"12345";
    NSString * copy = [src deepCopy];
    NSLog(@"%p,%p",src,copy);

    id deepCopy = [self deepCopy];
    NSLog(@"%p,%p",self,deepCopy);

控制台输出

-[ViewController viewDidLoad] line:23 content:0x10f666f00,0xa000035343332315
-[ViewController viewDidLoad] line:26 content:0x7fd71351d730,0x7fd71351ea90