编译#include< cstdlib>在Xcode-编译期间错误:找不到文件

问题描述

我在项目中添加了一个框架，该框架用于获取我需要实现c ++代码的回调，为此我添加了来自.cpp的.mm的c ++类

I have added one framework in my project, where to get the callbacks of framework I need to implement c++ code,for which I have added c++ classes which are .mm from .cpp

根据此链接中给出的建议

我还遇到了StackOverflow的几篇文章，发现我要么必须使用C ++，要么必须使用Objective C源类型(这是少数成员的建议).

I also came across few posts of StackOverflow, where I found either I have to go for C++ or Objective C source type(as suggestion of few members).

我正在寻找将C ++代码与Objective C类一起编译的方法，但我却发现#include <cstdlib> and #include <string>的文件未找到错误(编译时)

I am looking to compile c++ code along with Objective C classes,but I am getting file not found error (compile time) for #include <cstdlib> and #include <string>

请让我知道有人在解决它，或者遇到了相同的问题.

Please let me know any one worked around it.or faced same Issue.

在此先感谢！！！

推荐答案

我认为问题是，您在其中添加了C ++的.h文件包含在其他.m文件中，而不仅仅是.mm.有几种方法可以解决此问题:

I think problem is that your's .h-file, where you have added C++ includes is included in other .m-files, not just in .mm.There is several ways to solve this problem:

1. 仅在.mm文件中使用C ++. (请勿在.h中使用它们)
2. 更改所有文件，这些文件会将您的标头导入到.mm

3. 将它们包括在

1. Use C++ includes only in .mm files. (don't use them in .h)
2. Change all files, that import yours header to .mm

3. Include them in

#ifdef __cplusplus
#endif

块.还将此块用于提及C ++类的方法.例如:

block. Also use this block for methods where C++ classes mentioned.For example:

#ifdef __cplusplus
#include <string>
using namespace std;
#endif

@interface SomeClass

#ifdef __cplusplus
- (void) setName:(const string&) name;
#endif

@end

还有一种方法可以通过使用扩展名和类别来避免#ifdef #endif阻塞:

Also there is way to avoid #ifdef #endif block by using extensions and categories:

1. 仅在扩展中声明C ++的实例变量.
2. 为使用C ++类型的方法和属性创建带有附加.h文件的类别.

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