PCH File Tips

• The supporting files folder under the project has a "project name-prefix.pch" file, and also a header file pch the contents of the header file can be shared and accessed by all other source files in the project • Generally define some global macros in PCH files · Add the following preprocessing directives in the PCH file, and then use the log (...) in your project. To output the log information, the NSLog statement can be removed at once when the application is published (debug mode is defined)

#ifdef DEBUG

General project Development will customize the printing function, easy to debug

#define LOG (...) NSLog (__va_args__)

#else

#define LOG (...)/* */

#endif

PCH File Tips