xcode - #ifdef replacement in the Swift language -


in c/c++/objective-c can define macro using compiler preprocessors. moreover, can include/exclude parts of code using compiler preprocessors.

#ifdef debug     // debug-only code #endif

is there similar solution in swift?

yes can it.

in swift can still use "#if/#else/#endif" preprocessor macros (although more constrained), per apple docs. here's example:

#if debug     let = 2 #else     let = 3 #endif

now, must set "debug" symbol elsewhere, though. set in "swift compiler - custom flags" section, "other swift flags" line. add debug symbol -d debug entry.

as usual, can set different value when in debug or when in release.

i tested in real code , works; doesn't seem recognized in playground though.

you can read original post here.

important note: -ddebug=1 doesn't work. -d debug works. seems compiler ignoring flag specific value.


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