Objective-C：如何防止抽象泄漏 [英] Objective-C: how to prevent abstraction leaks

问题描述

我认为在Objective-C中我必须将实例变量声明为类接口的一部分，即使这些变量是实现细节并具有私有访问权限。

I gather that in Objective-C I must declare instance variables as part of the interface of my class even if these variables are implementation details and have private access.

在主观 C语言中，我可以在.c文件中声明一个变量，该变量在该编译单元之外不可见。我可以在相应的.h文件中声明它，然后在该编译单元中链接的任何人都可以看到该变量。

In "subjective" C, I can declare a variable in my .c file and it is not visible outside of that compilation unit. I can declare it in the corresponding .h file, and then anyone who links in that compilation unit can see the variable.

我想知道在Objective中是否有一个等效的选择-C，或者是否必须为类声明.h中的每个ivar。

I wonder if there is an equivalent choice in Objective-C, or if I must indeed declare every ivar in the .h for my class.

Ari。

推荐答案

Ari

关于如何完成不可见实例变量声明的很好的参考可以在此处找到，并谨向Matt Gallagher致谢。

A good reference to how to accomplish "invisible" instance variable declarations can be found here with credit respectfully given to Matt Gallagher.

希望有帮助，
弗兰克

Hope it helps, Frank

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