#include< string>在iOS中找不到C ++文件中的文件 [英] #include <string> file not found in iOS in C++ file
问题描述
我在iOS下有一个客观的c/c ++项目，将其从OS/X中移出，并且出现找不到文件"错误
I have a objective c/c++ project under iOS, moving it from OS/X and I get a 'file not found' error on
#include <string>
这是一个干净的项目，我刚刚添加了旧项目中的文件.是否在XCode中设置了STL?查找会产生多种可能性，例如
It's a clean project, and I've just added the files from the old project. Are the STL includes set up in XCode? A find produces a number of possibilities e.g.
/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/usr/include/c++/4.2.1/debug/
，但是将其添加到搜索路径中只会引发更多错误.有什么建议? (除了不使用字符串-它在我要移植的内部代码中)
but adding this to the search path just threw up more errors. Any suggestions? (apart from don't use string - it's in house code I'm porting)
xcode 4.2.1，在OS/X 10.7.3上运行的ios5.0，它位于.cpp文件中，该代码在OS/X上正常工作
xcode 4.2.1, ios5.0 running on OS/X 10.7.3 and it's in a .cpp file, the code works fine on OS/X
推荐答案
您真的确定<string>仅包含在.cpp文件中吗?
Are you really sure <string> is included only from a .cpp file?
我刚刚通过添加一个.cpp文件并包含<string>在一个新项目上进行了测试，并且它可以按预期工作(相同的Xcode版本，相同的SDK版本).
I just tested on a fresh project, by adding a .cpp file and including <string>, and it works, just as expected (same Xcode version, same SDK version).
但是，如果我在.m文件中包含<string>，那么我当然会遇到找不到文件"编译器错误.
But if I include <string> in a .m file, then of course I got a «file not found» compiler error.
因此请仔细检查，因为错误可能来自此处.
So double-check this, as the error may come from here.
您是要仅包含.cpp文件还是要包含供.cpp实现使用的.h文件中的<string>?
然后，它也可能包含在.m文件中，因此会出现错误.
Do you include <string> from a .cpp file only, or from a .h file, intended to be used by a .cpp implementation?
Then maybe it's also included by a .m file, hence the error.
还要检查您的预编译头(如果有)，以查看是否在其中包含一些C ++内容...
Also check your precompiled headers, if any, to see if you include some C++ stuff there...
还请记住，在以后的情况下，可以在需要时依赖__cplusplus宏.
Also remember, in that later case, that you can rely on the __cplusplus macro, when needed.
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