ios - 使用 ARC 进行内存管理

Question

ARC 会在释放时递归地释放 View Controller 中的所有属性吗？换句话说，什么时候“取消”一个属性是必要的(ARC 不会为你清理内存)？听起来循环依赖是一种情况，但我很好奇是否还有其他重要情况。

Answer 1

根据苹果文档

Instead of you having to remember when to use retain, release, and autorelease, ARC evaluates the lifetime requirements of your objects and automatically inserts appropriate memory management calls for you at compile time. The compiler also generates appropriate dealloc methods for you. In general, if you’re only using ARC the traditional Cocoa naming conventions are important only if you need to interoperate with code that uses manual reference counting.

问题的答案

Will ARC recursively free all properties in a view controller when freed? In other words, when is "nullifying" a property necessary (where ARC will not clean up the memory for you)?

根据 Apple 的文档，iOS 编译器将插入适当的版本/使属性变量为 nil。所以我们必须注意适本地声明属性变量，例如弱、强等的使用。

来自以下链接的更多引用

• > TransitioningToARC
• > MemoryMgmt