在Podfile中定义一个方法： 

def append_header_search_path(target,path)

    target.build_configurations.each do |config|

        # Note that there's a space character after `$(inherited)`.

        config.build_settings["HEADER_SEARCH_PATHS"] ||= "$(inherited) "

        config.build_settings["HEADER_SEARCH_PATHS"] << path

    end

end

然后在post_install中调用该方法：

installer.pods_project.targets.each do |target|

    if target.name == "Specta"

            append_header_search_path(target,"$(PLATFORM_DIR)/Developer/Library/Frameworks")

    end

end