CocoaPods-单独修改Debug或者Release模式下的Build Settings

最近开发的时候遇到了一个问题，某些pod库在不同编译模式下所需要的编译选项或者 BuildSettings 不同，比如说 Release 模式下GCC_GENERATE_TEST_COVERAGE_FILES为NO，但是 Debug 模式下为YES。
我们不可能每次pod install完成之后手动去修改。
其实修改Podfile就可以达到想要的目的。

post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
              if (target.name == 'APAddressBook' || target.name == 'CocoaLumberjack')
                  if (config.name == 'Debug')
                    config.build_settings['GCC_GENERATE_TEST_COVERAGE_FILES'] = 'YES'
                    config.build_settings['GCC_INSTRUMENT_PROGRAM_FLOW_ARCS'] = 'YES'
                end
              end
          end
      end
  end
end

• 如果主工程有多个BuildConfiguration，并且把主工程对应的BuildSettings -> Preprosessor Macros 加入DEBUG=1，对于加入的pod库是不会起作用的。也就是说使用这个BuildConfiguration，只有主功程能进行debug调试，而加入的第三方库不能。需要对pod库进行单独设置。或者直接修改Podfiles，来执行脚本进行安装时自动设置。下面是脚本。

post_install do |installer_representation|
    installer_representation.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            if config.name != 'Release'
                config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)', 'DEBUG=1']
            end
        end
    end
end

• 关闭Pod库的编译优化

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
                if (config.name == 'Debug')
                    config.build_settings['GCC_OPTIMIZATION_LEVEL'] = '0'
                end
            end
        end
    end
end

• 禁止生成 dSYM 文件

config.build_settings['DEBUG_INFORMATION_FORMAT'] = 'dwarf'

• 如果要复制debug模式下的环境，推荐加上如下设置

# Code Coverage Start
config.build_settings['GCC_GENERATE_TEST_COVERAGE_FILES'] = 'YES'
config.build_settings['GCC_INSTRUMENT_PROGRAM_FLOW_ARCS'] = 'YES'
# Code Coverage End

config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)', 'DEBUG=1']
config.build_settings['GCC_OPTIMIZATION_LEVEL'] = '0'
config.build_settings['DEBUG_INFORMATION_FORMAT'] = 'dwarf'
config.build_settings['VALIDATE_PRODUCT'] = 'NO'