对象拷贝有两种方式：浅复制和深复制。顾名思义，浅复制，并不拷贝对象本身，仅仅是拷贝指向对象的指针；深复制是直接拷贝整个对象内存到另一块内存中。

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一图以蔽之

再简单些说：浅复制就是指针拷贝；深复制就是内容拷贝。

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集合的浅复制(shallow copy)

集合的浅复制有非常多种方法。当你进行浅复制时，会向原始的集合发送retain消息，引用计数加1，同时指针被拷贝到新的集合。

现在让我们看一些浅复制的例子：

1 本文标题：iOS集合的深复制与浅复制 网页URL：http://www.tsicrk.com/article/gggsph.html 其他资讯 怎么查看电脑域名解析 如何查看域名解析 sap系统下载发票的简单介绍 java代码转jar java代码转js 阿里云服务器主机重置系统 阿里云服务器如何重置系统 c语言读入字符串的库函数 c语言怎么读取字符串的字符 网站建设专属方案 网站定制化设计 7X24小时服务 N对管家服务 让你的专属顾问为你服务 立即联系 首页 电话 微信 联系 基本 文件 流程 错误 SQL 调试 请求信息 : 2026-06-04 12:45:19 HTTP/1.1 GET : /article/gggsph.html 运行时间 : 3.1404s ( Load:0.0065s Init:1.5186s Exec:1.6063s Template:0.0090s ) 吞吐率 : 0.32req/s 内存开销 : 2,214.45 kb 查询信息 : 12 queries 5 writes 文件加载 : 36 缓存信息 : 0 gets 0 writes 配置加载 : 130 会话信息 : SESSION_ID=3rdckk64ik07sauktti2ri5il1 /www/wwwroot/tsicrk.com/index.php ( 1.09 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/ThinkPHP.php ( 4.61 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Think.class.php ( 12.26 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage.class.php ( 1.37 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Storage/Driver/File.class.php ( 3.52 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Mode/common.php ( 2.82 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Common/functions.php ( 53.56 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Hook.class.php ( 4.01 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/App.class.php ( 13.49 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Dispatcher.class.php ( 14.79 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Route.class.php ( 13.36 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Controller.class.php ( 11.23 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/View.class.php ( 7.59 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/BuildLiteBehavior.class.php ( 3.68 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ParseTemplateBehavior.class.php ( 3.88 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ContentReplaceBehavior.class.php ( 1.91 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Conf/convention.php ( 11.15 KB ) /www/wwwroot/tsicrk.com/App/Common/Conf/config.php ( 2.14 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Lang/zh-cn.php ( 2.55 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Conf/debug.php ( 1.49 KB ) /www/wwwroot/tsicrk.com/App/Home/Conf/config.php ( 0.31 KB ) /www/wwwroot/tsicrk.com/App/Home/Common/function.php ( 3.33 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ReadHtmlCacheBehavior.class.php ( 5.62 KB ) /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php ( 6.02 KB ) /www/wwwroot/tsicrk.com/App/Home/Controller/CommController.class.php ( 1.60 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Model.class.php ( 60.11 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php ( 32.43 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db/Driver/Pdo.class.php ( 16.74 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache.class.php ( 3.83 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php ( 5.87 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template.class.php ( 28.16 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib/Cx.class.php ( 22.40 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Template/TagLib.class.php ( 9.16 KB ) /www/wwwroot/tsicrk.com/App/Runtime/Cache/Home/7540f392f42b28b481b30614275e4e55.php ( 17.71 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/WriteHtmlCacheBehavior.class.php ( 0.97 KB ) /www/wwwroot/tsicrk.com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.24 KB ) [ app_init ] --START-- Run Behavior\BuildLiteBehavior [ RunTime:0.000005s ] [ app_init ] --END-- [ RunTime:0.000029s ] [ app_begin ] --START-- Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000311s ] [ app_begin ] --END-- [ RunTime:0.000336s ] [ view_parse ] --START-- [ template_filter ] --START-- Run Behavior\ContentReplaceBehavior [ RunTime:0.000060s ] [ template_filter ] --END-- [ RunTime:0.000079s ] Run Behavior\ParseTemplateBehavior [ RunTime:0.006173s ] [ view_parse ] --END-- [ RunTime:0.006199s ] [ view_filter ] --START-- Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000155s ] [ view_filter ] --END-- [ RunTime:0.000170s ] [ app_end ] --START-- 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1 [ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= ) [8] Undefined index: pid /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php 第 47 行. [8] Undefined index: db_host /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 120 行. [8] Undefined index: db_port /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 121 行. [8] Undefined index: db_name /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 122 行. 3.1404s