xcode -DNDEBUG 和 -DNS_BLOCK_ASSERTIONS 标志有什么区别
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What is the difference between -DNDEBUG and -DNS_BLOCK_ASSERTIONS flags
提问by Ossir
I've tried FauxPassource code analyzer and it showed me that I am missing -DNDEBUGflag, with next description:
我试过FauxPas源代码分析器，它告诉我我缺少-DNDEBUG标志，下一个描述：
This argument disables the C standard library assertion macro (as defined in assert.h).
此参数禁用 C 标准库断言宏（如 assert.h 中所定义）。
Though, when I check my build settings I found very similar by description flag -DNS_BLOCK_ASSERTIONS=1.
但是，当我检查我的构建设置时，我发现 description flag 非常相似-DNS_BLOCK_ASSERTIONS=1。
So I wonder now. Do I really need the flag that FauxPassuggests or I am fine with the one I have?
所以我现在想知道。我真的需要FauxPas建议的标志还是我对我拥有的标志很好？
回答by Rob Napier
NDEBUGdisables assert(), which is part of the C standard library. NS_BLOCK_ASSERTIONSdisables NSAssert()which is part of Foundation. You generally will require both if you have both kinds of assertions in your code.
NDEBUGdisables assert()，它是 C 标准库的一部分。NS_BLOCK_ASSERTIONS禁用NSAssert()它是 Foundation 的一部分。如果您的代码中有两种断言，您通常会同时需要两者。
