Why isn't Swift compiler flag being set?

Question

I want some code to only be executed in a release build, but the code does not get executed when the scheme is configured to use the release configuration.

What am I missing?

I have the following in my app delegate's didFinishLaunchingWithOptions method:

#if RELEASE
    Countly.sharedInstance().startOnCloudWithAppKey(appKey)
    Crittercism.enableWithAppID(appID)
    NSLog("crash logging enabled")
#endif

The target build settings look like this:

And the scheme is configured to use the Release configuration when I run the app:

Answer 1

You will need to set the preprocessor flags explicitly in the "Swift Compiler - Custom Flags" section, "Other Swift Flags" line.

Please check-

In absence of preprocessor macros, is there a way to define practical scheme specific flags at project level in Xcode project

Answer 2

It looks like the Swift compiler ignores -D flags that assign a specific value. If you use -DDEBUG and -DRELEASE, it seems to work.

Answer 3

now you need to set

Active Compilation Conditions

under Swift Compiler - Custom Flags

e.g.

Active Compilation Conditions DEV

you can check

#if DEV
  print("DEV mode")
#else 
  print("PROD")
#endif