问题
I have common files in several projects and I need to stop from compiling some lines and functions for project A, meanwhile it should be compiled for project B.
I know that I can use preprocessor. But it's not convenient for me. Is there any way to stop lines of code from compiling with condition like below?
#if PhotosModuleSettings.type == .documents
... do not commpile
#endif
回答1:
What's not convenient about using the preprocessor? You can specify the preprocessor macros in build settings of each target, or you can use .xcconfig files to specify them.
There's another simple way to do it, however. Separate the lines and functions that you want to conditionally compile into separate files. Maybe by using Swift extensions or subclassing or just separate global functions, etc..whatever. Then just choose which target(s) and/or project(s) you want those files added as membership.
Depending on your desire to refactor your code to make such a file separation, the preprocessor macros may be the better way to go, though.
回答2:
You will need to make use of pre processor macros.
Add a configuration for your project, and use that in the pre processor macros.
You can set the value for these configuration in the pre processor macros section for your targets based on your build configuration.
Here is a detailed blog related to the same concept
来源：https://stackoverflow.com/questions/55133043/xcode-stop-lines-of-code-functions-from-compiling