【xcode】Configurations/ Preprocessor Macros/ scheme

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why

In dev / release env, switch the default global variable :

  • url
  • other env variable

xcode setting

  1. PROJECT -> info -> Configurations，default only have “Debug” & “Release” tag
    • Use scheme to switch the tag
  2. goto Targets，choose the “Macros” from target
    • Build Setting -> Preprocessor Macros, you can find “Debug” & “Release” tag
    • In Macros, set your tag & value

scheme switch

Debug & Realese tags are set by xcode Configuration

  1. edit scheme.
  2. select Run tag, switch the “Build Configuration” tag to change your build setting.

coding example

you can create a config.h or .pch to set your info.

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#if DEBUG
#define a symbol
#elseif RELEASE
#define a symbol
#else
#define a symbol
#endif

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#if DEBUG==1
#define debug_only YES
#else
#define debug_only NO
#endif

Notice #if and #ifdef is diff.