Pod子模块工程编译宏设置

在Swift项目的模块化项目开发中，有个独立的网络子模块，采用了宏定义的方式来隔离服务器环境。在主工程(后续均称为A工程)的Configurations设置了多个config，分别是Debug、Alpha、Beta、Release。 A工程配Target配置如下图：

截屏2022-03-15 下午5.41.09.png

但是，现在遇到了一个问题，在采用不同config进行编译，项目始终读取的是DEBUG状态下的网络地址。开始时，以为是子项目中没有相关的配置，于是在Podfile中添加了如下脚本：

  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.name == 'Alpha'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','ALPHA=2']
      elsif config.name == 'Beta'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','BETA=3']
      elsif config.name == 'Release'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','RELEASE=4']
      end
    end
  end
end

但是，在做了此工作之后，才发现改方法仍然不起作用。后来查询资料说是Swift是不支持宏的，需要在Other Swift Flags中添加定义。于是修改如下：

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.name == 'Alpha'
        config.build_settings['OTHER_SWIFT_FLAGS'] = '$(inherited) -D ALPHA'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','ALPHA=2']
      elsif config.name == 'Beta'
        config.build_settings['OTHER_SWIFT_FLAGS'] = '$(inherited) -D BETA'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','BETA=3']
      elsif config.name == 'Release' 
        config.build_settings['OTHER_SWIFT_FLAGS'] = '$(inherited) -D RELEASE'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','RELEASE=4']
      else        
        config.build_settings['OTHER_SWIFT_FLAGS'] = '$(inherited) -D DEBUG'
      end
    end
  end
end

但是，运行到最后发现仍不生效。而在网络溜达了一圈，发现没有其他跟后的思路，索性回到项目本省的主工程。于是想着，主工程保持与主工程相同的配置方式应该可以吧。于是，有了如下的配置修改：

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'].to_f < 11.0
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '11.0'
      end
      if config.name == 'Alpha'
        config.build_settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = 'ALPHA'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','ALPHA=2']
      elsif config.name == 'Beta'
        config.build_settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = 'BETA'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','BETA=3']
      elsif config.name == 'Release'
        config.build_settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = 'RELEASE'
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)','RELEASE=4']
      else
        config.build_settings['SWIFT_ACTIVE_COMPILATION_CONDITIONS'] = 'DEBUG'
      end
    end
  end
end

好家伙，成功了。回过头来，看看配置。
SWIFT_ACTIVE_COMPILATION_CONDITIONS本身表示的是激活SWIFT条件编译。所以，改方法能成功也是预料之中的。