执行浅拷贝后如何管理内存？(How the memory will be managed after doing shallow copy?)

 我试图了解内存管理概念，并开始从Apple文档和许多关于Objective-C内存管理的文章中挖掘。 当我开始从Apple文档搜索时，我被发送回对象复制和消息传递概念。 
 
 在阅读有关复制对象时，我遇到了一个问题，我试图找到解决方案，但未能得到满意的解决方案。 如果有人能帮助我，我们将感到荣幸。 问题是： 
 
 array1 = {obj1,obj2,obj3}
 array2 = {obj4,obj5,obj6}
 array2 = array1 -- Shallow Copy
 
 与array2相关的内存发生了什么变化？ 如果有泄漏怎么发布？ 在ARC和NonARC环境中执行此类浅拷贝的更好做法是什么？ 

I was trying to understand memory management concept, and start digging from Apple docs and many articles regarding Memory management in Objective-C. When I start searching from Apple docs I was send back to object copying and messaging concept.
 
While reading about copying object I hit one question and I was trying to find the solution but fail to get satisfactory solution. It will be honor if someone will help me out. Question is:
 
 array1 = {obj1,obj2,obj3}
 array2 = {obj4,obj5,obj6}
 array2 = array1 -- Shallow Copy
 
What happened to the memory which was associated with array2? How to release if there is a leak? What is better practice to perform such shallow copy in ARC and NonARC environment? 

原文：https://stackoverflow.com/questions/36645157