After PDDocSaveWithParams() the original PDDoc is not valid and API
Reference said that user can reacquire PDDoc from PDDocDidSave
notification,but i don't know how to reacquire a valid PDDoc.Ii
register the PDDocDidSave notification, but the parameter " doc" is
not a valid PDDoc.
I save the file immediatly after i added an annotation, then i want to
get the annot but the annot is not valid,so i
guess that the annot is not valid cause of doc saved.

Anyone can help me?