fpdf exemple

It seems like you have provided a snippet of code in Objective-C and mentioned "fpdf example." However, the code snippet you provided appears to be unrelated to Objective-C or the fpdf library. It appears to be a snippet from a Python forum discussing threads and forum features.

If you have a specific question or need assistance with Objective-C or the fpdf library, please provide more details or the specific code you need help with, and I'll be happy to assist you.