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
