Podfileに以下を追加すればよい。
post_install do |installer_representation| installer_representation.project.targets.each do |target| if target.name == 'Pods-AFNetworking' target.build_configurations.each do |config| config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)'] config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] << '_AFNETWORKING_ALLOW_INVALID_SSL_CERTIFICATES_=1' end end end end
参考:objective c - I want to allow invalid SSL certificates with AFNetworking - Stack Overflow