How to extract information from MS project in Objective-C?

I have to extract some data from a .MPP file format in Object开发者_开发技巧ive-C.

I found nothing on internet to do so. any idea on how to read the file ?

well, might be indirectly helpful: http://mpxj.sourceforge.net/

Welcome to MPXJ! This library provides a set of facilities to allow project information to be manipulated in Java and .Net. MPXJ supports seven data formats, Microsoft Project Exchange (MPX), Microsoft Project (MPP,MPT), Microsoft Project Data Interchange (MSPDI XML), Microsoft Project Database (MPD), Planner (XML), and Primavera (XER and database).

The library is currently based around a set of structures modelled on the data described by the MPP file format. All manipulation of project data takes place using these data structures, which can be read from or written to the various supported file formats. The notes in the following paragraphs explain the facilities MPXJ offers for each file format.

So you might be able to take some of that code and port it to obj-c ... good luck!